Pirthane O
PIRTHANE® ‘O’ is an insulating system with excellent fire resistant properties. It complies with the requirements for a Class 0 surface as defined in Approved Document B ‘Fire Safety’, to the Building Regulations. It has a Class 1 surface spread of flame when tested to BS476 Part 7 1997; when tested to BS476 Part 6 1989 the material achieved a fire propagation index (I) of not more than 12 and subindex (i1) of not more than 6.
PIRTHANE® ‘O’ comprises of a low thermal conductivity insulating foam (PIRTHANE® HR) coated with a one component waterborne intumescent (PIRTHANE® FPC).
PIRTHANE® ‘O’ is used for thermal insulation and condensation control on:
- Underside of concrete soffitts or floor slabs.
- Interior of commercial buildings.
- Internal surfaces of marine craft.
Benefits
- Low thermal conductivity - reduced thickness - space saving.
- Lightweight - typically 2.5kg/m² for 0.45W/m²K U-Value.
- Excellent adhesive properties - withstands high wind speeds and vibration - can be used on single skin substrates.
- Zero Ozone Depletion Potential.
- Zero air erosion.
- Low cost maintenance.
PIRTHANE® FPC is a water based intumescent coating which gives exceptional fire retardancy to sprayed polyurethane foam. It does not contain asbestos in any form. The flame retarding intumescent properties are brought into action under heat exposure, when chemicals in the film decompose and swell (intumesce) to provide a carbonaceous foam layer acting as an insulating barrier between the source of heat and the substrate.
All BS476 fire test results relate to a 200 micron dry film thickness.
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