Preferred Solutions, Inc. (PSI)
Staycell One Step - Model 504 - Intumescent Spray Foam Insulation (HYBRID SYSTEM)
The HYBRID System consists of two separate layers of closed-cell foam: Staycell® 504 spray polyurethane foam as the base layer covered with the Staycell ONE STEP® 502 intumescent spray polyurethane foam as the exposed surface layer. It is used to insulate building components such as roof decks, ceilings, walls, siding, structural steel or tanks to provide an integral air barrier / insulation / vapor retarder for building envelope assemblies.
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This system has Class A/Class 1 flame spread and smoke developed ratings and qualifies as an Alternative Thermal Barrier Assembly when installed exposed without thermal barriers, ignition barriers or other fire protective surfaces in accordance with QAI Listing Report No. B1020-1.