4 Lb. Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Soundproofing, Filling Voids, and Insulation (2 Gallon Kit)

worked just as it says it does

It's messy but that's to be expected , follow directions and it will do what you want it to .

This product is labor intensive to use. You can not reuse whatever you mix %26 pour with. I suggest going to a dollar store and buying cheap pitchers with measurements showing and only mixing what will fit in them for each pour. Then toss the pitcher and go to next one. Wait 5 minutes if you need to overlap. Don't try and mix it all in one pour because you won't have time to finish and this stuff expands/explodes upward out of the container like crazy. Also, pay attention to the temperature if you are using outside on a hot day. You only have about 10 seconds to mix and start pouring or product starts expanding in the pitcher. Use double or triple nitrile gloves, it will melt vinyl type. Also, use heavy cardboard under all of your containers and seperate measuring items. You have to keep it all separate and can't even reuse the paint stirrers. Once the stuff is mixed together and touches something, you can't reuse that to mix again. Just use disposable stuff and throw it all away. The stuff works well but very messy and quick reaction time. Have it all laid out and count your seconds. Go with half time if it's over 90° in outside application.