Sika
Sikaflex 291 Marine Sealant Adhesive
Sikaflex 291 Marine Sealant Adhesive
$12.97In StockSee Product Details
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Product Details
Sika 291 is a fast-cure marine adhesive/sealant that bonds well to wood, metals, painted surfaces, and most plastics. Boat builders and marine technicians use this all-purpose adhesive for a variety of marine applications. Safe to use above and below the waterline. Use the marine-grade sealant to bond structural boat components, create waterproof seals, and reduce vibration impact.
Polyurethane sealant comes with a nozzle to easily apply. Cure times depend on caulk thickness and ambient weather, but typically cures within 1 to 4 days for watertight seal. The fast strength build-up can then be painted and sanded for final touches. Available in black and white.
NOTE: SIK-291201W is a 20oz. Sausage Pack, which is NOT compatible with standard caulking guns.
Info & Guides 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
- Technical Specifications
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.
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Reviews
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1 to 10 of 29 Reviews
1 – 10 of 29 Reviews
Most Recent
Maumelle, AR
5 out of 5 stars.
yes
6 months ago
Sealed hull to deck joint on sailboat. It was a little hard to get it out of the tube. Good price and I appreciated the free shipping. I'll be back
Helpful?
Vermont
5 out of 5 stars.
Great stuff!
6 months ago
Been using Sikaflex for years as a professional carpenter and boatbuilder. Hope the guy who invented it got well paid. Great stuff!
Helpful?
CA
5 out of 5 stars.
Yes , I would definitely buy 291 again it is a favorite.
2 years ago
I use 291 for bedding and sealing around passthroughs for wire harnesses that are openings that might leak.
Helpful?
Moriches, Long Island, NY
4 out of 5 stars.
Excellent Caulk
2 years ago
This is an excellent caulk, and a light duty adhesive. I like that it's not permanent like other 3M caulks. However, this stuff makes a great seal between surfaces, and really keeps out the water. Quite sticky though, and you need mineral spirits to clean up. The only thing I don't like is using half the 10 oz tube, because by the time I need it again, it hardens up in the tube and the nozzle within a few days. Fortunately they do sell this in 3 oz tubes, that have a screw cap, since I use this in small quantities.
Helpful?
Peconic, NY
5 out of 5 stars.
I will use it again!
2 years ago
Using it on below water-line seams on a1936 Chris Craft cruiser. Easy to work with but MUST use latex or vinyl gloves, long sleeves, etc. It can get quite messy! Found it to be sandable after curing, very helpful in fairing rough bottom areas.
Helpful?
Dover, NH
5 out of 5 stars.
Great to use when building a wooden boat
4 years ago
I used this while building a 16' skiff. It's easy to work with and flexible. Highly recommend.
Helpful?
Cleveland, ohio
5 out of 5 stars.
Stuff sticks to everything
4 years ago
Used this for sealing thru hull bolts and other fittings. Seals great. Wear gloves.
Helpful?
Tiverton RI
5 out of 5 stars.
Good sealant with many applications
4 years ago
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.
Helpful?
Punta Gorda FL
5 out of 5 stars.
GREAT STUFF..... EASY TO APPLY.....
4 years ago
GREAT STUFF..... EASY TO APPLY.....HIGHLY RECOMMENDED
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Cranberry Lake, NY
5 out of 5 stars.
It worked
6 years ago
Sealed my instrument panel from the weather. Waiting to see when I remove the panel will it be easy to remove
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1 – 10 of 29 Reviews