TotalBoat Flotation Foam - 2 Part Expanding Polyurethane Marine Pour Foam for Boat Floatation, Insulation and Soundproofing (2 LB Density, 2 Gallon Kit)

Excellent product, works as advertised. Easy to mix and pour. Not a lot of time to mix and pour but enough. Plan ahead and have everything ready and it’s a breeze. Would and have bought again.

Applying concoction into sit on top kayak Started out not liking it much. It's early November in Central Texas and the outside temperature was around 80 degrees, the sun was out and warm. The cans were stored in my shed, and the temperature of the resin and activator were probably around 50 degrees. I mixed up a little bit of this stuff into a wash basin and put it in my kayak. The stuff didn't really foam up. Realization: Just because the outside temperature is 80 degrees still does not mean that the foam will work. I found a pot large enough to put one can in at a time (wife was watching TV at the time :). Light up the stove top and bring the temperature of the resin and activator to around 80 degrees (shake in a circular motion to mix hot and cold, I had to put on the stove 3 times per can). I used my hands to measure the temperature. Nothing scientific. I screwed off the top of the foam can and had to poor it quick... It was trying to foam up. I used a wash basin to mix the 2 together. Don gloves, this stuff adheres to everything and is difficult to remove. Ensure that the hole that you are putting this stuff into is fairly large (Mine is almost the size of my head and still got this stuff all over my kayak.) It worked ok at first, but after the first batch started to heat up the inside of my kayak the rest of the stuff worked like a charm. It filled up the whole back end of my 2 person kayak. After it's done foaming it turns hard. I can still scrape it with my fingernail. But, for filling the void and stabilizing the outside hull, it did a superb job. I just bought a second batch to fill up the front end of my boat. I hope this helps.... happy foaming :) Second purchase I didn't have to heat up since I left it out in the sun. Kayak was in the sun as well and this stuff worked great. I mixed up a little at a time, and then pour it in. This time after the pouring in 2-3 batches I took the kayak off the shed it was leaned up against and turned it topside down to spread the foam all over. It still worked great but got some on my hands this time... they turned black. I rubbed them against a brick wall and the blackness deteriorated. Not completely gone but it's not as prevalent.

Absolutely fantastic, it really does what they claim. The photo is a 18” tube 55” long. One set filled it for me. Great flotation!

We bought a small boat found out after the purchase. the deck and stringers were rotten. It was covered with a board and carpet. Well after doing some research, we decided to make new stringers and deck. Used this foam to fill the hull. Easy to work with just follow directions in make small batches

Roped in by artists to provide a 4 foot diameter paintable sphere that could be dismantled for transport. Poured two 24" cubes of foam - which expanded exactly to spec, sawed into 2.5"x8" square tiles, and hot glued together on a moveable template to form a sphere. Glassed with 1 layer csm and polyester inside and out to form a very rigid sandwich. This foam performs just as specified, but when glassing, allow double resin to compensate for soak up into the foam. This foam is good stuff, though the savage shrinkage of polyester resin will selectively compress any less dense areas to form low spots. If form is important, use epoxy with woven glass cloth.