Sika Sikaflex 291 Fast Cure White 10.3 Oz. 300 Ml

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.

This is really good RTV! I didn't know Silksflex existed until I had to change out a pair of jet drives on a Zodiac Hurricane. Silksflex RTV was the recommended by the OEM manufacturer. I use Silkaflex on Motorhomes, trucks and around my house. Very strong and flexible and seawater resistant.

As advertised look forward to using in the spring.

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.

This stuff is amazing! After removing the old antenae from my rv, it left a massive hole in my roof membrane. I used 75% of 1 black tube to trowel over the 12" hole. Then I used a thin layer of white to make it match. After sealing the rest of the rv with white, I tested everything the next day with a garden hose. Where water had previously come in, it was bone dry! I waited 3 weeks and went on holiday. I tested it again after super hot weather and the garden hose. My 18ft rv trailer is still bone dry! Trailer is flexing under dry/wet conditions. Very happy with this amazing product!