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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.
- 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.
Reviews for Sikaflex 291
June 28, 2023
Verified Purchase
Worked great on boat
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February 23, 2023
Verified Purchase
I use 291 for bedding and sealing around passthroughs for wire harnesses that are openings that might leak.
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July 12, 2022
Verified Purchase
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.
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May 9, 2022
Verified Purchase
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.
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September 28, 2020
Verified Purchase
I used this while building a 16' skiff. It's easy to work with and flexible. Highly recommend.
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June 26, 2020
Verified Purchase
Used this for sealing thru hull bolts and other fittings. Seals great. Wear gloves.
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June 17, 2020
Verified Purchase
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.
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May 22, 2020
Verified Purchase
GREAT STUFF..... EASY TO APPLY.....HIGHLY RECOMMENDED
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July 30, 2018
Verified Purchase
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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July 16, 2018
Verified Purchase
I wish JD offered the option of shaking the paints they sell.
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