Profoam spray-in-place, closed-cell polyurethane insulation can be applied to the exterior side of basement walls to provide both insulation and damp proofing. Additionally, closed cell spray polyurethane insulation may be applied to a bed of gravel prior to pouring a concrete slab.
What to do when your spray hose is partially blocked with Isocyanate crystals
![6-Working with MDI & Polymeric MDI- What you should know[AX205] Sept2012](http://3.14.93.248/photos/document-covers/main/88fc3074abf5108724f1767d0737c6533655d719.png)
