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Jamestown Distributors(800) 497-0010
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Sika 291 is a Professional grade Marine Adhesive/Sealant used by boat builders and yards to bond and bed boat components structurally. Fast strength build-up overnight. Use above and below the waterline. Comes with nozzle. All purpose adhesive sealant, bond to hull & structural members. Bedding Compound, light bonding, fast cure polyurethane sealant.
NOTE: SIK-291201W is a 20oz. Sausage Pack, which is NOT compatible with standard caulking guns.
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Density: 10.3 lbs per gal
Tack Free Time: 60 min.
Rate of Cure: 1/4-in x 1/4-in bead 9 days at 40F/30% R.H.
1/4-in x 1/4-in bead 4 days at 73F/50% R.H.
1/4-in x 1/4-in bead 3 days at 73F/70% R.H.
1/4-in x 1/4-in bead 1 day at 100F/75% R.H.
Shore A Hardness (ASTM D2240): 45-50
Elongation at Break (ASTM D412): >600%
Tensile Strength (ASTM D412): 221 PSI
Lap Shear Strength (ASTM D1002): 165 PSI
Peel Strength: 35 lbs/in on fiberglass, 25 lbs/in on gelcoat
Application Temperature: 40F to 110 F
Service Range: -40F to 190 F
Color: Black, White
Sandable, paintable and is waterproof
Below Water Line (yes/no):
Rate Of Cure:
We have aluminum framed bi-fold shower doors that were screwed and caulked to the teak frame of the shower opening. The original caulk appears to be silicone and it was beginning to leak between the frame and the wood.I've removed door, cleaned off the old caulk and am looking for a recommendation on what caulk to use for the reinstall. The caulk/sealant is not just a bead on the inside face of the frame to wood joint. It is also used as bedding between the frame and the wood.
Sika 291 would be a good adhesive for this application. You may also want to use Sika Akivator to clean the substrates, 215 primer for the wood and 206G+P for the aluminum.
Can I use this to seal my lapstrakes on my 57 Lyman as an added precaution, or what do you recommend. I bought you fairing compound and epoxy sealer. Thanks
I recently read an article suggesting that if the strakes are leaking, the rivets and clinch nails need to be tightened. There are some good videos on youtube showing the process. Sealant can be effective but it has to applied between the laps. Faring compound and epoxy are generally too brittle to use between the planks.
Is sikaflex-291 applicable to sealing gap between fibreglass manhole & upvc pipe? Any other product reccommended for this sealing application?
Hi---I'm sorry but I'm not sure. Reason--I don't deal in fiberglass--just wood! SorryDoug
I assume what you want to do is seal this gap so no moisture can enter through the gap. As long as there is no movement and the gap is somewhere around 1/4" or less this product should work well.
Yes it should work great and it is paintable.
What do you use for clean-up?
been using Sikaflex for 30 years now--IT IS THE BEST--best way to do a job is to tape out the area--push the edges down well--this will give you a professional look--if you smudge use lacquer thinner
THOMAS A. KREHL
masking tape...seriously, the virtue of this material is that it will seal (stick to) just about anything. The best way to address the cleanup problem is to avoid having to clean up.
how difficult is it to remove this product and does it remain flexible when cured ?
I did not try to remove it so cannot answer that question it is tough to remove from your hands so wear latex gloves. I found this to be a great product. It does stay flexible. I used it to repair long cracks in the bottom of my Coleman canoe. After the Sikaflex dried I went over that with construction adhesive to make the repair more durable. I have not had a leak since although you need to reapply the construction adhesive from time to time as it tends to start peeling off.
Sikaflex is good stuff. Although I'm not a big user, I plan on a fresh tube for each use, otherwise I use a 1/4 drill to clear out the tip plug. It also gives you a sample to stretch. Flexible and medium tenacious sums it up, sticks well to pre-cleaned surfaces. I've not removed any, but word has it that it comes away easier than the other more aggressive sealants. A sharp blade and soapy water helps in cutting a seam clear. Go goop! Paul
It is very difficult to remove when cured. In fact, it's difficult to remove when still fresh. Remains flexible when cured, but requires a high shear load to see the flex.
IF IT HAS NOT CURED--YOU CAN CLEAN UP WITH PAINT THINNER---IF IT IS CURED--IT IS VERY FLEXIBLE AND VERY HARD TO REMOVE--NEED A CHISAL AND HAMMER..GOOD LUCK
Very easy to remove and yes it stays flexible. We have to re-do joints on our City Waterslide at the pool and this is the product we use because it is easy to work with and easy to remove.
Can I paint 291?
I've had no problem painting any Sikaflex product.
Can this be used to seat and seal a forward deck window on a Hunter 295?
I would say yes. I used it to reseal the side ports on my boat and it's held up nice and watertight for several years now. 3m's 5200 makes a tighter seal, but the window could never be removed again. I found this product to make just as good a waterproof seal, but you can remove it if necessary. One thing I have to stress though, is make sure that all surfaces are good and clean and free from wax. I used lacquer thinner to get rid of any oil, etc...
If it has a metal frame, it should work fine. Don't know if it adheres to all plastic type materials.I used it to seal under rub rail on a '80 21 ft. Hammond Challenger. Still good after 5 yrs.
Sets up quickly it has very good sealing quality
Yes, that's what it's designed for. However, it's a 3 part process: you also have to purchase the activator and the primer solution and apply both to each surface prior to applying the 291 caulk which comes in black. I used this product to attach the plexi canopy of my plane to the canopy frame, thus eliminating rivets or screw fasteners thus reducing the possibility of stress cracks in the future. The plane is capable of 200 mph and I haven't lost the canopy (or my life) yet! Best of luck.
Can this be used to seal hull seams in an old wooden boat? I am looking to seal the oily, problem areas lower and near the stern. I would use 5200 but I am looking for something less expensive and less permanent.
Sikaflex is caulking, i.e. flexible to accommodate the wood planks swelling when immersed. I have used it on Beetle Cats to replace old fiber caulking, with good results. I have read that sealing seams tight before immersion can result in increasing the gaps, by preventing the wood planks from swelling. Pay attention to clean oil off any surface to ensure good adhesion.
sorry, I have no experience with wooden hulls.
I don't think any of these sealants work well in an oily environment.
Is it OK to use on SS drinking water tanks?
According to their data sheet that I found online: "NSF approved for potable water (black & white only)". And it will certainly stick well and seal.
I would say yes--after using this product in the marine business for 30 years it is the best caulk out there--I use it around the house for everything--it is a polyurethane and cures with no evident smell--I'd say use it in good health
THOMAS A. KREHL
The Silaflex 291 Product Data Sheet states"NSF approved for potable water (black and white colors only)
I have no idea. I used it to seal a hatch. However, I would like to know the answer if one is determined. I would imagine that there would be three places to go to get a decent answer: makers of stainless steel drinking water tanks (ask them how they seal the tanks) and Sikaflex manufacturer (ask them the question.) Third option would be makers of medical products involving stainless steel liquid reservoirs for use in hospitals.good luck
Thanks a lot. I wouldn't be afraid to drink water now.
will sikaflex -291 bond to lexan?
don't know - I used it on a wooden boat
I didn't use it on that
Stuff sticks to everything
Used this for sealing thru hull bolts and other fittings. Seals great. Wear gloves.
Good sealant with many applications
Great product for bedding and sealing hardware above and below the waterline. A good medium strength polyurethane and comes in colors. It doesn't have any UV propertiesand if that's a requirement pay to exposed aera with a UV sealant.
GREAT STUFF..... EASY TO APPLY.....
GREAT STUFF..... EASY TO APPLY.....HIGHLY RECOMMENDED
Punta Gorda FL
Sealed my instrument panel from the weather. Waiting to see when I remove the panel will it be easy to remove
Cranberry Lake, NY
Like the product
I wish JD offered the option of shaking the paints they sell.
Used this on underwater seams where the plank ends meet the transom. Really good adhesion, very flexible. I'll use this wherever I used to use Life- Caulk, much better. I fully recommend this for bedding fixtures and hardware also. Good stuff!
Great for sealing deck fuel hatches.
Orange Beach, AL
the product is what it is, easy to workwith and works as lis
On ordering these items, I have always ordered white from every vendor. When I ordered these I made sure I noted white as color of choice. When I got order they were black in color. Product was coded incorrectly and now I have a case of a product I cant use.
Rebeding Deck Screws
Was not packaged well by Jamestown , almost not usable!!!
Toms River, NJ
Use this sealant to install thru hulls and seacocks.