⚓ Seal the deal with speed and strength—your boat’s best ally!
SIKA Sikaflex-291 is a fast-curing polyurethane adhesive and sealant designed for marine use. It bonds strongly to gelcoat, fiberglass, metal, and wood, performing reliably above and below the waterline. Resistant to fresh and sea water, chemicals, and temporarily to fuels and oils, it offers a paintable finish and is NSF and USDA approved for incidental food contact, making it ideal for professional boat builders and marine repairs.
J**N
#1
They don't make a better quality sealant
R**T
Better than what you get at lowes or homedepot
Ordered multiple tube's only one came the wrong color. I sealed the cracks in a torched hardwood floor and it's beautiful. Perfect and sands smooth
R**T
My go to!
I swear by this product on my marine applications! Great product for the price point!
J**F
Holds well, good gap filler.
Used this to fill the seam between the hull and deck. Used an electric calking gun allowing for controlled flow into the seams which were 22ft runs from stern to bow. took two tubes of Silkaflex. While fresh it was easy to use a scraper to push this material deeper into the seam and simple to remove excess leaving a smooth seam level with the deck. It took several days to harden to my satisfaction and in the meantime collected a layer of dust onto its surface. Once painted there is a subtle but clear discoloration showing through the paint. It's a good product but as this was a restoration job on a classic wooden boat I think epoxy would have been a better choice. But, no complaints with how this material works and I'm sure it will hold up for some time as the hull and deck flex a bit with movement and with the natural swelling and shrinking inherent in wood.
B**Y
Horrible packaging fell apart on use. Total waste.
Came in a ridiculous tube of thin cardboard tube. Have never seen any caulk -- even the cheap stuff -- come so poorly packaged. A little dampness was all it took for the tube to fall apart and burst when I tried to use the product. Total waste.
C**O
Great product if you have humidity
Wonderful, grippy, but gooey to apply - super great adhesion - but absolutely need humidity such as East or West coast, near water, Great Lakes or humid Georgia. I live in Colorado and it is still gooey on my sailboat - called the company - they said need 50-60% humidity or it won't dry. Used in my bathtub and I had to leave hot steaming water in the tube twice and it adhered perfectly. Otherwise would be 5 stars in a humid climate. 2 stars for Colorado - but it's not chemical reaction for drying - it's reactive to humidity.
L**E
The best marine caulk on the market!
I've purchased so many tubes of this, because it's just so great. I'm working on a campervan conversion and this is the only sealant I use to cover up holes and leaks on the body.
D**N
Perfect
Delivered as advertised.
Trustpilot
1 week ago
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