Liquid Urethane Pour Foam - 4 Lb Density

  • LIQUID FOAM INSULATION- Use it to fill dock floats or boat parts for soundproofing and insulating!
  • IMPRESSIVE STRENGTH-After curing, our foam boasts 95%-98% closed-cell structure with a 2-lb density!
  • EASY TO USE-Great even for novice boat owners! Mix at 1:1 resin to hardener ratio for best results!!
  • QUICK SETTING-Our expanding foam with short curing time & minimal shrinkage hardens in place within 10 minutes.
  • LONG LASTING- Once cured, urethane is unaffected by gasoline, oil, fresh or saltwater, or solvents!

Can’t hear yourself think while on your boat? Being out on the water gives you a sense of freedom & relaxation unlike any other… but you have to admit that it’s somewhat ruined by the constant noise of the engines. Fortunately, soundproofing your craft is easier than you think, & it has other benefits too. We offer a product that not only cuts down on the ambient noise produced by your boat but also improves thermal insulation & adds buoyancy to give you greater peace of mind. Enjoy better safety & comfort with this Liquid Urethane foam kit by True Composites!

Our liquid urethane foam kit is the ideal choice for marine applications, & you can easily shape it to fill any void in your ship. It is a lightweight, powerful substance that adds extra buoyancy to your boat's floatation chambers or even your docks, keeping them afloat no matter what. Block sounds & maintain a comfortable temperature inside your boat with this insulating flotation foam! Our urethane also has a 95 to 98% closed-cell structure once it has finished curing, making it immune to damage from gasoline, oil, fresh or saltwater, or solvents, making it one of the most dependable & enduring materials for boating needs. This pourable urethane foam cures rapidly, after expanding, through sculpting you can carve or s& it into a moldable shape. It can even be coated with any type of polyester, epoxy, or vinyl ester resin without melting. To avoid waste, please follow the recommended temperature range & pour in small batches. <b><br><br>What else should you know about our foam kit?

✅ Flotation range of 100-120 lbs per quart

✅ Ideal working temperature is 75-80°F or above

✅ Allows twenty seconds for mixing & pouring

Use on a clean surface to ensure proper bonding. Enhance your boat’s feel, durability & performance. Add this Liquid Urethane foam kit by True Composites to your cart today! 


Items Description Price Qty
0330040704040084 Half Gallon Half Gallon $39.97
0330040704040094 1 Gallon 1 Gallon $79.97
0330040704040104 2 Gallon 2 Gallon $109.97
0330002 4 Gallon 4 Gallon $209.97
0330004 6 Gallon 6 Gallon $299.97
0330006 8 Gallon 8 Gallon $379.97
0330040704040106 10 Gallon (Comes in 5 Gallon Pail) 10 Gallon (Comes in 5 Gallon Pail) $459.97

Buy 4+ to get 10% off and 10+ to get 15% off

Customer Reviews

Based on 59 reviews
Michael Combes

We are satisfied with the foam itself.
But the way you ship it, is not a safe way.
Every time we receive it the cans are badly dented, and they are leaking.
We have asked to please label it, this end up, fragile.
We have also asked to please put it in a sturdy box with packing around it.
Our UPS contact had to drive a can over to our building because it leaked pretty badly.
The foam works great for us.
Thank you

Joe B.
I totally love

Worked perfect. Cost was cheap shipping was fast.

Kate A.
very satisfied with my purchase.

Easy to use if you follow directions. Must mix fast and pour quickly.

Very cute!

worked great as described. expands a lot , something close to 1:4 . Better if thin layers.

Denise C.
Absolutely perfect!

Really sturdy, strong foam with even rise. Can be messy even when you follow the instructions carefully. Heavier density is perfect for the dock floats we are building.