Firestone RESISTA consists of a closed-cell Polyisocyanurate foam core laminated on both sides to a heavy-duty, double-coated, non-organic fiberglass facer. RESISTA Polyiso uses Firestone’s proprietary IsoGard foam technology to create an impressive insulating value which can translate into significant energy savings. Firestone IsoGard foam technology incorporates a HCFC-free blowing agent that does not contribute to the depletion of the earth’s ozone layer (ODP-free). Firestone RESISTA contains between 5 and 10% recycled material, depending on the thickness of the board.

As part of a Firestone Total Roofing System, Firestone RESISTA demonstrates a series of features & benefits:

  • Compatible with all types of single-ply roofing systems: ballasted, fully adhered and mechanically attached.
  • Suited for direct application onto steel roof, concrete or wood deck.
  • Superior thermal resistance and compressive strength.
  • Firestone RESISTA offers exceptional protection against fire, wind and mold.
  • RESISTA Polyiso is the only 25 mm insulation board with a UL Class A rating for fire ressitance as well as a Euroclass E rating.
  • RESISTA boards are Factory Mutual (FM) approved.
  • The double coating of non-organic facing material on both sides of the insulation board also meets ASTM D3273 standards for mold resistance.

Product data

Firestone RESISTA insulation boards are available in flat boards of 1.22 x 2.25 m (4′ x 7’4.5″) and in thicknesses ranging from 25.4 mm to 101.6 mm (1″ to 4″).

For a detailed R- or U-value calculation, please contact Firestone Technical Department.

Physical properties

Property ASTM test Typical Value EN test Typical Value
Density D-1622 32 kg/m³ 823 32 kg/m³
Compressive strength D-1621 > 138 kPa 826 > 138 kPa
Dimensional stability D-2126 < 2%
Water absorption C-209 < 1% (by volume) 12087 < 3% (by volume)
Service temperature -73°C to 121°C

RESISTA Technical Information Sheet (TIS)
RESISTA Safety Data Sheet (SDS)

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