So if you are looking for a strong insulation, a closed-cell spray foam is what you want to grab. As for smaller fill-ins, an ...

Polyisocyanurate is the third type of foam board. It's made of a closed-cell sheet of foam enveloped in aluminum foils, giving it a high insulation R-value of R-7.7. It contains recycled materials and ...

Half a gallon of wood glue, a pile of random, scattered resistors, or in [Ken]’s case, closed-cell silicone foam. Wanting to avoid this situation he set about trying to make his own silicone ...