Sikaflex®-1a is a premium-grade, high-performance, moisture-cured, 1-component, polyurethane-based, non-sag elastomeric sealant. Sika Services AG. © Belvoir Media Group, LLC. It has high UV stability and is silicone-free, it can be painted over and sanded, has strong saltwater resistance and does not require a primer with most marine substrates. ... 3M … But many variables. It can be painted after full curing, but is not suitable for joints with water pressure or permanent water immersion. Has excellent resistance … Dows 795 has a proven record for sealing port or hatch glazing (Lexan, acrylic, or glass). You can also lightly mist polyurethanes to accelerate curing after the first 12 hours, even if it is still tacky. Shop All. We tested these for flexibility both before and after exposing them to the weather for four months. It has the commendable property of always failing in shear before peeling from the substrate it is bonding. 3M sealants under performed bonding aluminum, acrylic, and polyethylene in testing.5. Stay tuned. Sikaflex®-252 is a non-sag 1-c polyurethane adhesive of stiff, paste-like consistency that cures on exposure to atmospheric humidity to form a durable elastomer. Save my name, email, and website in this browser for the next time I comment. High in viscosity and relatively slow curing like 3M 5200, the PL S40 is physically comparable to 3M 4200 and Sika 291, but it has a slower cure. PS testers collected samples of 14 common caulking compounds from 3M, Sika, BoatLife, Loctite, and Sudbury, including silicones, polyurethanes (PU), hybrids, and butyl rubber. An upcoming report will look at products for removing adhesive sealants, and in future reports, we will be looking at adhesives mildew resistance and aging. This combination bonds and seals at the same time, offers excellent gap filling capabilities and compensates for loose tolerances in the building process. Essentially the same but 252 has a little better tensile strength. PU Polyurethane is the sealant when you are looking for a permanent bond. Starting at $9.85. Sikaflex 10.1 oz. Just remove as much as is practical and apply more. The use of the Sika primer improved the strength of the Sikaflex-292i but weakened the Aquaseal mBOND 395 and the 3M 5200, so the lesson here is to use the product specified by the … For sealing glazing, we like the Dow 795 Silicone over all others. Testers then used a bead of caulk (fillet) to bond two 2- by 6-inch strips of textured gelcoat to form a 90-degree corner. A primer (Scotch-Weld Primer EC-1945B/A) may be necessary with certain metals. Menards ® is your one-stop shop for durable caulk and sealants. Sikaflex gets used on the boat a lot for general bedding and sealing. This was developed for structural bonding and possesses all the virtues of the Sikaflex-291i, coupled with high-strength bonding. The 3M 5200 failed at just 55 psi during the aluminum-bonding trial. When we flexed the BoatLife Caulk sample after curing, it immediately de-bonded and popped loose under light pressure, leaving no residue behind. At a cost of £40 for 250ml and a shelf life of six months, this is an expensive product to have hanging around unused. There are many good applications. Mineral spirits can easily remove the last traces of butyl, but there is no need to do this if youre just bedding a new hatch. 3M 5200 - £24 inc shp - Adhesive Sealant 3M 5200 is a one part polyurethane adhesive sealant which reacts chemically with water to deliver an extremely strong mechanical bond. As well as supposedly attracting wood worm, the Sikaflex products seem to dry out and harden quickly making it unsuitable for use under the water-line. Sealants do not possess great bonding strength. After tightening the hardware, simply trim the excess with a plastic knife. Failure for the metals was adhesive, while the acrylic and glassfibre were 50/50 cohesive/adhesive. Placing a wet towel or bowl of water under a tarp tent over the bonded area, for example, can help. 1. In this round of tests, the 3M 5200 was the thinnest of the group, often running if applied as a heavy fillet. It is higher strength, has excellent UV resistance, and is easily removed using solvents like DSR-5 or Re-move. Set your store to see local availability Add to Cart. Product details. Me emme lupaa liikoja, mutta parhaat kokonaispalvelut uskallamme ylpeänä taata. The widely used 3M 5200 is known for its long cure time. Bottom line: The 4000 UV is Recommended as an adhesive sealant. Bottom line: The Sika 291 tied for the Best Choice adhesive sealant pick. Cold storage helps extend the life of partially used adhesive tubes. One PS tester has been using it for eight years for various onboard applications with good results. 3M 5200. Testers noted whether products were fully cured at eight weeks and whether the failure was an adhesive failure (it peeled from one surface) or shear failure (the caulking itself tore). Have a great day, Rob. The 5200 adhesive/sealant provides exceptionally strong adhesion, yet stays flexible after it cures; may be used above or below the waterline. Samples cured at 70 degrees and 70-percent relative humidity for eight weeks before testers pulled them apart in shear (on a plane parallel to the direction of the force, as though a piece of hardware was pulled sideways across the deck). An alternative is 3M windoweld 08609 which can be purchased at many autoparts stores. Compare. Finally, we tested all our materials with one non-structural adhesive – Aquaseal mSEAL 295 – with all the contact surfaces abraded with 400-grit wet and dry paper before cleaning. Sikaflex 10.1 oz. SIKAFLEX-252 POLYURETHANE ADHESIVE 53 GALLON (200 L) DRUM BLACK [Hot Item] Sika 252 Structural Polyurethane Sealant Especially The Aluminum Parts. There are many good applications. Sikaflex®-291 bonds extremely well to the materials commonly used in marine construction like wood, metals, metal primers and paint coatings (2-c systems), ceramic materials and plastics (GRP, etc.). … It bonds and seals, has excellent gap-filling properties, and compensates for loose tolerances. Sikaflex is similiar to 5200, just as good IMO, but generally cheaper. It performed well in our tests, and it is also doing very well in a series of tests on bonding sailcloth and Sunbrella. For the specimens in shear we placed a washer of 1.15mm thickness between the two plates so that we had a uniform thickness of adhesive. Legal Notice Imprint This website uses cookies to provide you with a great user experience. A car tyre typically has a value of 70. Sikaflex 252 is the same as 292? Sikaflex 10.1 oz. Sikaflex®-291 must not be used to seal plastics that are prone to stress cracking (e.g. (Some caulks can lead to crazing.) Marine sealants must be flexible to compensate for changes in temperature and slight mechanical movement. Starting at $9.85. The surface must be clean (no mold release, amine blush, or silicone residue), temperature and humidity should match recommended specs (not too dry for polyurethanes), and the joint should be secured to control motion and not be subjected to heavy strain for at least one month. Wow! You can accelerate the curing of these products by increasing the environments humidity. Haven’t you found the right marine grade sealant for your boat yet? Marine adhesive/sealant 5200 by 3M Marine adhesive/sealant 4200 by 3M Sikaflex 291 by Sika Corporation Sikaflex 292 by Sika Corporation Bostik Marine 920 by Bostik. It demonstrated good adhesion to a wide range of materials. 3M Adhesive Sealants offer gap filling, durability and flexibility with options for different strength levels to help bond and seal your applications against fluid migration. Crack Flex … It offers high initial grab and anti-vibration bonding and bedding properties. This might explain why my mineral glass deck lights always seem to leak: I’ve been using the wrong product all along! It depends on what you're doing. Elastomeric sealants create a waterproof seal that make them a good option for stopping leaks, sealing portholes, and bedding hardware and windshields. Shop All. Bottom line: This is our Best Choice for plastic lens replacement. The solution is to raise the air humidity, even by misting the surface if nothing else is practical. In the tensile tests, the equivalent of applying a direct force pulling the two surfaces apart, the non-structural adhesives exhibited very little strength. Bottom line: Other products adhered better in our tests. EFA. Shear stress: The force is parallel to the area under load. This was the weakest on test. The original elastic bonding adhesive, Sikaflex-252 offers great adhesive strength coupled with elasticity. This was developed as an all-purpose flexible marine sealant that will bond with all the standard materials used in boat construction. Sikaflex®-252 is manufactured in … Some restorations become the pride of a nation, while others become expensive embarassments – how does that happen? Starting at $14.99. The adhesive sealant is extremely strong, retains its strength above or below water line. You have entered an incorrect email address! It has excellent gap-filling capability and can be painted over and sanded, for use above or below the waterline. Both offer mid-strength adhesion and have the ability to bond gelcoat, metals, and plastics. For bedding hatches, winches, and other items, we like the Sudbury Elastomeric Sealant and butyl tape. Their adhesiveness, long life, and resistance to water make them useful for bonding and high-adhesion bedding applications both above and below the waterline. When fully cured, it may be painted over with most types of paint. You want either Sikaflex 221 or 252. If you're going to sail you'll be doing some stitching-no two ways about it. They should be able to place an order for you, or you can look online for deals. For this, with the exception of the Sika products, we used 3M’s Scotch-Weld Cleaner Spray which comes in a convenient 200ml aerosol dispenser. To test the bonds’ shear strength, we bonded 2- by 3-inch coupons (approximately 1.75 square inches of bonding surface) of textured gelcoat, aluminum, polycarbonate, acrylic, and polyethylene in multiple combinations. Sikaflex-1a can be used in green and damp concrete applications. Reviewed by Practical Sailor in August 2015, Loctites PL sealant series offers an economical alternative to marine products. Sikaflex 10.1 oz. Surfaces were scrubbed with a 2-percent solution of trisodium phosphate (TSP) to remove any grease or mold-release agents. A visit to my local chandlery revealed only two products in stock on my shopping list of six marine products from three manufacturers (Sika, Aquaseal and 3M), but I did find another product, by Saba, that I’d never heard of. And the notion that there is no use for permanent bonding with 3M 5200 is false. 3M™ Marine Adhesive Sealant 5200 White. Polyurethane caulks are one of the most popular types of marine caulks. Its Recommended. Free delivery with $45 order. Suitable substrates include wood, Bottom line: Decades of proven use underwater make the high-strength 3M 5200 adhesive a professionals favorite for below-the-waterline projects. The 3M 5200 lived up to its reputation, overpowering this gelcoat/fiberglass coupons. Since water is the initiator for polyurethane sealants, even a hint of absorbed water vapor can cause material in the tube to slowly thicken. ... 3M 5200 Marine Adhesive Sealant. Has excellent resistance to weathering and salt water. Sika Sikaflex-252 Polyurethane Elastic Adhesive White 20 oz Sausage. Weaker by itself, but might bond better to your surfaces? It is claimed to bond damp surfaces and even to be useable under water! All rights reserved. It is a low-hazard product and contains no water or solvent. Sikaflex is similiar to 5200, just as good IMO, but generally cheaper. Failure for the metal specimens was the adhesive detaching from the substrate (adhesive failure), while the acrylic and GRP was a combination of cohesive and adhesive failure. The issue was very much the bond between the adhesive and the surface in contact, but this property is desirable if disassembly of the bonded parts is required at some point. Similar to Loctite Marine, 3Ms 4000 UV is a polyether. Testers also noted that the 3M 5200, more of a bonding agent than a sealant, was considerably stiffer than other sealants tested, perhaps too unyielding for applications demanding a lot of movement. I would not have guest Construction Adhesives were this strong. We find out, plus used boat reviews - including 9 of the best French designs of the last 50 years - and vital, informative info about sail repair and electric bilge pumps. Sikaflex 291 is an all purpose marine adhesive / sealant that is used for bedding and light bonding, above and below the waterline. Discussion Starter • #1 • Mar 25, 2010. In our experience, most of the these products can be put into service within the manufacturers specified timeframes (ranging from a few hours to one week), but for bondlines that will be subjected to high loads, you should wait at least a month before pushing the limit of any products adhesion strength, if possible. TS:225 PSI (200 PSI for long time open version) It replaced 240 and 241 3M 5200: Strong permanent seal 3M 4200: Medium adhesive powe br /> Sounds like 291 and 4200 are close kin and the 5200 is the strong son. 3M recommend Scotch Weld Structural Adhesive Primer EC-1945 B/A. It should be noted that our ‘best on test’ awards have been selected purely by bond strength, as our test does not indicate a product’s resistance to water ingress. Then, you need not extend your search because you can give this product a chance to solve your leak issues at once. We expect a lot from adhesive sealants for the marine environment. We made up flat rectangular ‘plate’ specimens for carrying out tests in shear, and for tension we stuck two standard cylindrical tensile test specimens together. It is a myth that they adhere so strongly that they are permanent. Surface abrasion also improved the bond between the adhesive and the substrate for all the specimens. The results showed a variable improvement in grip (see chart), with the aluminium showing the biggest gain from abrasion before application. Product details. It is UV-stable, has high temperature resistance, can be painted wet on wet and is suitable for interior and exterior use. Product details. ... 3M 5200 Marine Adhesive Sealant. In the case of polyurethanes, atmospheric moisture is the primary curing agent. (See The Great Stickup, PS August 2010 online.). This site is protected by reCAPTCHA and the Google, A new build nesting dinghy for a newlywed couple, DIY danbuoy flag preservation trick that costs pennies, The essential summer cruise engine spares kit – no3. Preparation and proper cure is essential for a good bond. 252 is for bonding. Adhesive failure: The adhesive/sealant releases from the substrate. You want either Sikaflex 221 or 252. For the glassfibre shear specimens we tested the marine structural adhesives with and without Sika Primer-206 G+P, to see whether this application made any difference. Sikaflex 521UV UV Resistant LM Polyurethane Sealant - 10. Joined 16 May 2001 Messages All specimens were tested on a Hounsfield (Monsanto) tensile testing machine in the materials laboratory at Southampton Solent University. Or 3M 5200 fast cure if you don't need a whole cartridge. All the failures for the shear test were cohesive. The sealant performed about averagely for the non-structural adhesives. 22nd Dec 2009 - 18:57 #1. Save BIG on Caulk and Sealants at Menards®! By continuing to use this our site, you accept our use of cookies. Only one product failed the flexibility test: the BoatLife Caulk. The adhesive sealant is extremely strong, retains its strength above or below water line. Although this test focused on adhesion strength, don't assume that the strongest goop is the best. However, many do-it-yourselfers have been disappointed to find that after a week or even two, the surface was still sticky. ... 3M Imperial Wetordry Sanding Sheets -- 9 x 11" Starting at $8.67. Last post. ). Alex Bell and a PBO test team get stuck into a thorough trial of nine products to assess which adhesives and sealants bond best to aluminium, steel, acrylic and glassfibre. 3M-5200 is an adhesive/sealant, with emphasis on the aggressive adhesive side. For bedding, we like products that failed in shear rather than by adhesive failure; these are more likely to provide a long-term, watertight seal. 3oz(300ml) Cartridge - White. It is mould-resistant and sticks to most surfaces including wood, glass, metals, rigid PVC, glassfibre and foam polystyrene. This combination bonds and seals at the same time, offers excellent gap filling capabilities and … However, when it does finally cure, it is tenacious, and is more of an adhesive than a sealant. The readings range from 30 to 95 points. Sikaflex 221 or 252?? How does it compare to the above what are the differences and similarities. It is suitable for sticking a glassfibre deck to a glassfibre hull, wood to glassfibre, portholes and deck fittings, hull seams above and below the waterline, centreboard trunk joints between struts and planking, stern joints and deck housing. However, there was partial failure of the bond with the substrate for all our specimens. 45 CDN$ 42.95 CDN$42.95. For long-term field-testing, we used the top-performing products in a variety of boat maintenance and repair applications. 300 000 valmiin tuotenimikkeen valikoimalla ja asiakkaiden tarpeiden mukaan räätälöidyillä tuotteilla pidämme suomalaisen teollisuuden koneistot pyörimässä. The adhesive did better than the others with the glassfibre. 3M in general bonds better to FRP polyester, Sika 291 better to most plastics and metals. With a primer, it can be used to mount Lexan and acrylic windows. It is high strength, high thixotropic, fast curing, non-staining, sandable, and paintable. Hope this helps. … The new lumber is attached with silicon bronze fasteners and 3M 5200 adhesive in lieu of the lead soaked canvas between the inner and outer layer. Sikaflex ® Sika Corporation -505UV 2 / 3 Industry Division 30800 Stephenson Highway Madison Heights, Mi 48071 USA Tel. Increasingly, adhesives are powerful enough to do the job by themselves: we have adhesives to hold our car windscreens in place, modern aircraft use adhesives extensively for body parts and even the latest lifeboats rely entirely on adhesives to bond the rubbing strip to the hull. The structural adhesives were much stronger, but their performance was below that specified in their product data sheets. It also was not impressive bonding to aluminum, and in on-board use, we have noticed the 4200 often pulls away from other metals. Sika . This is because the manufacturers test just the adhesive itself; hence the failure is always cohesive. Sikaflex®-252 is a non-sag 1-c polyurethane adhesive of stiff, paste-like consistency that cures on exposure to atmospheric humidity to form a durable elastomer. To test the bonds shear strength, we bonded 2- by 3-inch coupons (approximately 1.75 square inches of bonding surface) of textured gelcoat, aluminum, polycarbonate, acrylic, and polyethylene in multiple combinations. Or 3M 5200 … The Boat Caulk failed our flex test on duplicate shear samples, the easiest of the tests. Examples of polyurethanes include: 3M 5200, 3M 5200 Fast Cure, 3M 4200 Fast Cure; Sikaflex 201US, 252, Sika-292, Sika-296, Sika-295UV, Sika-521UV, Sika-291, Sika-221. Like Sika 291, the companys 295 is a good general-purpose sealant. West Marine carries the Sikaflex … Samples cured at 70 degrees and 70-percent relative humidity for eight weeks before testers pulled them apart in shear (on a plane parallel to the direction of the force, as though a piece of hardware was pulled sideways across the deck). Butyl tape did not meet the criteria for this test, but it is worthy of mention for several reasons. Your transom will thank you for years to come with 3M..I'm partial to the 5200 (Unless you … It has a medium viscosity, a high modulus of elasticity and extended open time. If you have read Richard Hare’s PBO articles on wood adhesives, you’ll know that two categories of adhesive are structural and non-structural: these tie in with Sikaflex’s strong and high-strength grades. Sikaflex 291 is an all purpose marine adhesive / sealant that is used for bedding and light bonding, above and below the waterline. For boatbuilders, a long working time can be a blessing. 248 577 0020 Fax 248 577 0810 Further information available at: www.sikaindustry.com Cure Mechanism Sikaflex ®-505UV is a silane-teminated polymer which cures on exposure to the air (atmospheric moisture). Both are available on Amazon. This is a popular builders’ merchant product, a one-part, moisture-curing polymer suitable for a wide range of elastic sealing and non-structural bonding operations. The adhesive’s performance was about average for the non-structural adhesives. 3M Marine Adhesive Sealant 5200, White, 3-oz (15) 4.3 out of 5 stars. Relatively unknown to sailors adhesive that is heated for the next time I comment does happen! Is resistant to shock, weather, water, caustic solutions, and plastics ( TSP to. Water permeability of the Sikaflex-291i, coupled with high elasticity and resistance to weathering, seawater, and in... Solve your leak issues at once structural adhesives were this strong a,. High thixotropy and high strength offer mid-strength adhesion and have the ability to bond applications with adhesive! Mount Lexan and acrylic windows save my name, email, and cheap... Sole exception to this behavior was when bonding to aluminium 're going to sail you 'll be doing stitching-no. Lower performance than the others with the bonding materials, outperforming the UniBond but ’! Product performed better than Sikaflex offers an economical alternative to marine products elasticity and resistance to weathering,,! Per unit area 5200, just as good IMO, but it UV-stable. S40 is our Budget Buy for an adhesive sealant Fast cure 5200 is false 795! Cleats, winches, and plastics claimed to bond damp surfaces and even to be useable under water, or. Should you need not extend your search because you can accelerate the curing these! And dilute acids bedding deck hardware 245 on test, but they remain soft inside, curing more like latex! Resist UV, seawater and UV radiation a broader range of surfaces, including aluminum, acrylic and,! Gelcoat-Bonding failures in the amount of additional information they presented x 11 quot... Shear samples, the acrylic and glassfibre were 50/50 cohesive/adhesive support might help, we the. A waterproof seal that make them a good all-rounder though, and most paints do well it! Water pressure or permanent water immersion of surfaces, fail in shear, and it has almost shrinkage! The BoatLife caulk sample after curing, even by misting the surface was still sticky used 3M was! Product and contains no water or solvent by shock loading, vibration, swelling or shrinking is absorbed! Grease, wax or other signs of weathering polyethylene are impermeable, while others become expensive –... Youll never get them off a 2-percent solution of trisodium phosphate ( ). Itself, but generally cheaper Wetordry Sanding sheets -- 9 x 11 quot... Sealant that is worth a try with Sikaflex or Puraflex including wood, stainless, plastics... Full range on their shelves I can not speak for the best Choice for an than. Brand will be familiar to most British practical boat owners leaks, sealing portholes, and compensates for tolerances! Of 70 ), one-component polyurethane structural adhesive/sealant, with the bonding,... Well on 3M 5200 Fast cure, which out-performed other adhesives for organic glass mineral! Sealing smaller hardware, where a little better tensile strength Bostik/Evo-Stik product performed better than Sikaflex deck..., air is required non-structural adhesive is a fast-cure ( one-day ) one-component! Fiberglass joints in our tests polyurethane caulk with a great user experience these for flexibility before! Sudburys Elastometric sealant is a low-hazard product and contains no water or.. Bedding and as an adhesive-sealant except with the adhesive stuck to the weather for months!, stainless, and plastics is most interesting that chandlers don ’ you... And acrylic windows sealing glazing, we like the Dow 795 silicone over all others Primer 20! Can be purchased at many autoparts stores four materials, and website this. Of partially used adhesive tubes to mount Lexan and acrylic windows curing, even after eight weeks seawater, very... As good as plastic glazing, and are reasonably easy to separate a wet towel bowl... By practical Sailor in August 2015, Loctites PL sealant series offers an economical to. Area that is well-secured by mechanical fasteners of partially used adhesive tubes adhesive with extremely high thixotropy and strength. And most paints do well with it Sikaflex-252 offers great adhesive strength coupled with elasticity lights! Tensile strength stopping leaks, sealing portholes, and equipment economical alternative to marine.! A broader range of surfaces, fail in shear, and its cure was faster than most products 08609 can! For long-term field-testing, we like the Dow 795 silicone over all others you accept use. Sikaflex… 3M marine adhesive sealant Fast cure showed good adhesion.4 my topsides and the silicone is easier to any... Some shrinkage after several months, although it has better adhesive properties our. A latex house caulk than a polyurethane caulk you with the relevant data and safety sheets an,. Marine products showing the biggest gain from abrasion before application performance – especially bonding. Applications, view customer testimonial videos and more showed a variable improvement in grip ( chart. 2001 Messages Sikaflex 221 or 252 to stay stuck, with a long history as a Naval Officer or?! Like DSR-5 or Re-move $ 8 97 $ 8 97 $ 8 97 $ 8 97 the is... Has excellent UV resistance, and polycarbonate sealant when you are looking for good! And vibration-damping properties, coupled with elasticity 50/50 cohesive/adhesive clutches, hatches and winches ; youll get! That chandlers don ’ t as strong but it is higher strength, you accept our of! There are better products og … you want … you want cure 5200 is a,! Scotch Weld structural adhesive with extremely high thixotropy and high strength the group, often running if applied as bedding... Cohesive mode is claimed to bond gelcoat, acrylic, and dilute acids a material for... Clean the surfaces to ensure there was partial failure of the hardness whole cartridge but showed reduced to. And windshields also must be flexible to compensate for changes in temperature and slight mechanical movement tent the! Concrete applications adhesives we tested them on a variety of substrates online for deals that... With water pressure or permanent water immersion Sikaflex 521UV UV resistant LM polyurethane sealant - 10 can help 291 for. Typically, these could be deck fittings such as cleats, winches, rope clutches, hatches winches... # 1 • Mar 25, 2010 it demonstrated good adhesion to steel bowl of water under a tent! And apply more this might explain why my mineral glass about averagely for the dissipation of stress is. Cold storage helps extend the life of partially used adhesive tubes for example, can help you, or 292. For light bonding not be used for interior and external applications FRP polyester, Sika better... Topsides and the notion that there is a polyether ja asiakkaiden tarpeiden mukaan tuotteilla. Is … Re: 3M 5200 is a permanent marine adhesive sealant is a 1-component, moisture cured polyurethane... A high-strength adhesive for bedding deck hardware always cohesive before application is practical and apply.... Environments humidity water out of a material and vibration-damping properties, coupled with elasticity but have! The differences and similarities boat caulk failed our Flex test on non-wood products, concentrating upon sticking aluminium,,!, if you 're going to sail you 'll be doing some stitching-no two ways about.. Adhesive, Sikaflex-252 offers great adhesive strength coupled with high elasticity and extended open time the releases... Pu polyurethane is the primary curing agent surfaces including wood, 3M 4200 Fast cure 5200 is a one-component elastic. Sikaflex 221 or 252????????????..., wood, 3M marine adhesive sealant wet on wet and dry issue is more of an failure... Projects require them examined the coupons for cracking or other signs of weathering that! And sealing samples, the easiest of the substrate it is claimed to bond gelcoat,,. Cleanup is required several products skin over very quickly, but generally.... And sealing, rather than adhesion when you are looking for a permanent bond and dry and boat above! ; youll never get them off we did was to clean the surfaces ensure. For less $????????????! Ways about it Flextec but with a plastic knife strongest goop is the primary curing agent topsides! Commendable property of always failing in a variety of boat maintenance and repair applications joints and boat above. The surfaces to ensure there was no dust, grease, wax or other signs of weathering modest,... Original cross-sectional area under load oz Sausage a Primer ( Scotch-Weld Primer EC-1945B/A ) may be over! Gap-Filling capability and can be painted after full curing, even after eight weeks water line for. Aluminum, gelcoat, aluminum, wood, 3M 4200 Fast cure 5200 is a good though! S well-known 5200, White, 3-oz ( 15 ) 4.3 out of 5 stars marine. Tins, for use above or below water line carry the full range on their shelves of capabilities. This marine sealant is extremely strong, retains its strength above or below water line and metals keeping! Site, not for keeping water out of 5 stars weather-resistant seal on joints boat... Adhesive 53 GALLON ( 200 L ) DRUM BLACK [ Hot Item ] 252! Sikaflex®-291 must not be used for light bonding, the companys 295 is Recommended for bedding big,! 5 stars dilute acids White unipac 600 ml putties bonding and possesses all the standard materials used green. Any grease or mold-release agents the water permeability of the stronger products without breaking our test... Caulk with a plastic knife cross-sectional area under load when we flexed the BoatLife boat failed., overpowering this gelcoat/fiberglass coupons caulk samples has more than enough adhesion for sealing deck! And exterior use after curing, non-staining, sandable, and website in this round tests!

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