BioBased Insulation.
Derived from American soy oil, BioBased 501 spray foam insulation is installed in liquid form and, the maker says, expands to 100 times its original size in seconds. It has a Class 1 fire rating, does not support mold growth, will not shrink, and emits no VOCs. 800.803.5189.

Sealection 500 is a nontoxic spray foam insulation that has a Class 1 fire rating and reduces heating and cooling costs by as much as 50%, the maker says. The product also limits airborne noise and dust, improving indoor air quality. 877.336.4532.