TotalBoat 2 Lb Density Expanding Foam Kit, 2 Part Closed Cell Pourable Polyurethane for Boat Flotation, Insulation, Reinforcement and Void Filling (2 Gallon Kit)

Nice product

Applying concoction into sit on top kayakStarted 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.

This expanding foam is really useful for me in multiple jobs / hobbies. I build molds and use it to pour faux stone / rock panels which I then use in home remodels, building, etc... It can actually be used to create molds as well. I also build fiberglass / carbon fiber panels for automotive projects and use this foam to pull positives off of simple parts like fenders and other flat-ish stuff.The key to working with this product is to be prepared. Use acetone to clean. Have mixing cups, rags, gloves, tape, painter's plastic, mold release, etc... When it is in liquid form it's very thin and will easily escape through small cracks, so be sure to seal molds up well to minimize loss and mess. Caulking works well.As everyone says, it works very quickly once mixed. Heating the product up will make it take off even quicker, and it will also increase the yield significantly. I, personally use a heat gun on low from a distance to heat each cup before mixing.Lastly, don't disturb it when it is beginning to harden and take shape. Doing so will cause it to "deflate" in that area, kind of stunting its growth.Follow directions and read some other reviews for insights and tips. You'll be pro in no time.

Want to feel like a scientist!? For real, this floatation foam blew away my expectations. I was building a custom boat, and so I decided to use flotation foam for the bow of the boat. I was shocked at how much it expanded and how easy it was to use and pour. Now it's got me thinking of what else I could use it for! Great product, great company!

Floation in hull of boat. Thats what its designed for .

Good value for the your money

Awful. Does not expand like they say it will. Waste of money.

I used this foam in my 1974 Meyers Aluminum boat while I was replacing the floor. The foam worked better than I had imagined. It filled every nook and cranny and once I got the floor in it doesn't make a sound.Tips; Get the room your working in as hot as possible or if outside wait for a hot day. The hotter the area the more the foam rises and the more area you can fill per pour. Warning, try to measure the portions as close as you can because once this stuff gets going you will not be able to stop it and you will have a lot of waste from overflow. (I wasted about a quart in overflow) Make sure the foam has plenty of room to grow and has an escape for overflow. It bowed a metal plate I had riveted in the floor because it couldn't get out and I had to drill a hole quickly to give it room. Also this stuff is extremely sticky so clean your measuring cups and tools after each pour. Also purchase a drill mixer, you will not have enough time to properly mix the two parts by hand before it starts rising, which happens about 35 seconds after mixing starts.I have to say this is the most fun I have ever had during a project. I felt like a kid in science class watching the two chemicals mix and then start growing. I would recommend this product to anyone who is looking to fill space under a boat floor.