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Product Specs & Information

Click on the titles below to find the PDFs with information on each subject. All of the files below are PDFs.

Additionally, see our products in action here:

Staycell ONE STEP® 502 HFO Intumescent Spray Foam Insulation 

Staycell ONE STEP® 502 HFO is a two-part, intumescent, closed-cell, spray polyurethane foam insulation used to insulate roof decks, ceilings, walls, siding, structural steel or tanks and provides an integral air barrier/insulation/vapor retarder for building envelope assemblies.

This product 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.

Staycell ONE STEP® 502 HFO Intumescent Spray Foam Insulation

Staycell ONE STEP® 502 HFO is a two-part, intumescent, closed-cell, spray polyurethane foam insulation used to insulate roof decks, ceilings, walls, siding, structural steel or tanks and provides an integral air barrier/insulation/vapor retarder for building envelope assemblies.

This product 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.

Staycell® HYBRID HFO Intumescent Spray Foam Insulation System

The HYBRID System consists of two separate layers of closed-cell foam: Staycell® 504 HFO spray polyurethane foam as the base layer covered with the Staycell ONE STEP® 502 HFO 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.

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.

Base Layer: Staycell® 504 HFO Spray Foam Insulation

Top Layer: Staycell ONE STEP® 502 HFO Intumescent Spray Foam Insulation

Staycell® HYBRID HFO Intumescent Spray Foam Insulation 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.

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.

Base Layer: Staycell® 504 HFO

Top Layer: Staycell ONE STEP® 502 HFO 

Staycell® 504 HFO Spray Foam Insulation

Staycell® 504 HFO is a two-part, closed-cell, spray polyurethane foam insulation material having Class 1/Class A flame spread and smoke developed ratings and is used to insulate structural steel, ceilings, roof decks, walls or tanks and provides an integral air barrier/insulation/vapor retarder for building envelope assemblies.

Staycell® 504 HFO serves as the base layer for the Staycell® HYBRID HFO System. Other applications include stud wall cavity fill covered with ½” gypsum and exterior vertical wall insulating air barrier applications.

Fire Safety During Construction

From 2017 to 2021, fire departments responded to an estimated average of 4,440 fires in structures under construction per year. These fires caused an annual average of 5 civilian deaths, 59 civilian injuries, and $370 million in direct property damage*.


Accordingly, the greatest fire hazard of SPF is during the construction process when it is exposed prior to the installation of the fire protective covering (e.g. ½” gypsum board).


To learn more how Staycell ONE STEP® Systems improve fire safety during construction, see the files below.

*NFPA Fires in Structures Under Construction, October 2023

Staycell® 504 HFO Spray Foam Insulation

Staycell® 504 HFO is a two-part, closed-cell, spray polyurethane foam insulation material having Class 1/Class A flame spread and smoke developed ratings and is used to insulate structural steel, ceilings, roof decks, walls or tanks and provides an integral air barrier/insulation/vapor retarder for building envelope assemblies.

Staycell® 504 HFO serves as the base layer for the Staycell® HYBRID HFO System. Other applications include stud wall cavity fill covered with ½” gypsum and exterior vertical wall insulating air barrier applications.

Staycell® 504/Staycell ONE STEP® 502 Intumescent Spray Foam Insulation System (Two-Layer HYBRID System)

The Two-Layer 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.

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.

Base Layer: Staycell® 504 Spray Foam Insulation

Top Layer: Staycell ONE STEP® 502 Intumescent Spray Foam Insulation

Let's Connect

Get more information on how Staycell ONE STEP® Systems’ high quality, energy efficient solutions can make better buildings.

Let's Connect

Get more information on how Staycell ONE STEP® Systems’ high quality, energy efficient solutions can make better buildings.

Products in Action

Let's Connect

Get more information on how Staycell ONE STEP® Systems’ high quality, energy efficient solutions can make better buildings.

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