Spray Polyurethane Foam (SPF) is a compound composed of two liquid chemicals known as isocyanate and polyol that allow the combined liquid solution to form a foam that creates a tough resistant barrier on roofs using a closed cell system to protect a structure from elements, leaks, cracks, and other potential structural damages.
It's a spray polyurethane foam 2 component. Materials on the rig not weight on roof and very light weight materials
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