Urethane Foam
You may know these as Pour Foams. Smooth-On produces both rigid and flexible pour foams all the way from 3 pounds per cubic foot up to 26 pounds. How heavy is that? Pretty close to the same density as a good old southern pine 2 x 4.
You may know these as Pour Foams. Smooth-On produces both rigid and flexible pour foams all the way from 3 pounds per cubic foot up to 26 pounds. How heavy is that? Pretty close to the same density as a good old southern pine 2 x 4.