Fiberglass Supply Depot 6 Lb. Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boats, Dock Flotation, Carving, Soundproofing, Filling Voids, and Insulation (1 Gallon Kit)

Drys and starts expanding pretty quickly so you’ve got to work fast once you mix them. I use it for art stuff. Pretty cool to work with, a little pricey, but what isn’t these days.

Good stuff, There's definitely a learning curve, but that's on me. Using between thin fiberglass sheets (Boston Whaler resto) I appreciate it's ability to maintain some density even when allowed to expand freely, without deforming the skin.

Glad I got this for rudder repair, it’s helped reshape the rudder so far a lot.

I bought this not for its intended purpose to be fair. I was running an experiment to make a DIY Archery Target. I made a 1.5ft cube as a mold. I followed the instructions at the desired temperature range and did this outside. It should have expanded to fill the box, it expanded to fill half of the box. It expanded but not at the desired rate or dimensions. I also mixed the entire contents of both containers. I have watched videos where people do a little at a time, but that was not the result I wanted. I double checked everything, before starting. I mixed the parts as instructed but did not get the expected outcome of expansion. It did expand and did turn into a dense floating foam though. For anyone wondering I did shoot arrows at it after the cure period and I had arrow snot on the arrows and had to cut them out, couldn't pull them out. That did not impact my rating though. The 3 stars is purely based on the product not expanding to the capacity it said it would so to get the 1.5 cubic feet I would have needed two kits not one.

Works well. Not good for foam filling tires though. It breaks down after a short time.

I used this product to pour through a small hole into an area that an animal was attempting to dig under my deck. It expands pretty rapidly and you need to get it poured as fast as you can after mixing it. You have maybe a 60 second working time before it takes off. It expands very rapidly and voluminously. It filled the area with decently hard cured material. Just don't put it someplace fragile and confined, it will very happily push out thin wood on its way to full expansion. The end material seems acceptably durable. It builds a thin skin on itself and it's not easy to rip apart or dislodge. The resultant material also sticks aggressively to anything, so make sure you are ok with that. Also, don't get the pre-cured material on your hands; it sticks extremely well to human skin and it will be a pain to get off. Overall a great product for filling spaces!

This is a great product and a good value for the money. It expands well when thoroughly mixed and sets very hard once cured. It worked well for foundation washouts, concrete pads, and walkways. Definitely wear gloves during application—it can get messy. Pros: expands well, cures very hard, good value, great for repairs Cons: can be messy to work with Would I recommend? Yes—solid option for concrete and foundation work

I use this often. Very strong, hard. Can add more. Plenty of time to mix with wand and pour if access to area is open/accessible. Best to set a cover over, plastic sheet between, and trap it right where you want it. Use lot of weight to hold until set because will “ push out/distort” just put what you need

Meet expectations.

Works great for my taxidermy molds Expands roughly 4 times liquid amount and is rock solid ( 6lb )

This is good stuff, not soft, squishy foam. Very high density and tough

Works extremely well!

mixing is important, better mix greater yeild better float. liked the shippers percautions adding insulation for candian weather!!