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.

Good value for the your money

So I have used a ton of this for a few projects. This will hopefully help some of you guys.1: buy a couple just jugs of acetone. It really helps cleanup the sticky goo you will have to deal with.2. Invest in the cheap plastic mixing cups with the proportion lines. If you are doing semi enclosed areas don't poor to much in so the foam can full expand and you do not waste product.3. Buy one of those cheap rechargable milk froather mixers they have for coffee. It makes mixing things way easier and more consistent. It will likely be ruined after, but they are only like 12 bucks.4. Buy some small silicone scrapers like what you use for the kitchen. If you let them sit in acetone in a cup, you can use it to scrape the left overs from your mix cups after you pour and save some mess. You can usually get several Uses out of each cup doing this and reduce the mess.5. Nitrile gloves are must. This stuff gets every where.. You can use Acetone to clean up.6. Probably the most important part - chill the two parts in the refrigerator overnight. This slows the reaction and gives you time to actually mix it throuroughly and pour it without having to rush around. Once it warms. It will behave normally and start expanding.Lastly if you spill it on accident, left it dry completely before cleaning up. It's much easier to dea with dry.I'm working on an idea to hook this to a gun the auto mixes components and despenses it in a more controlled manner. If I have any success I will post and update.

I’m sure this product works well. I’m just not to happy about the hardener jug how it arrived really bloated. Better packaging next time.

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.