HR-Prof Fire Protection for Structural Timber and Porous Materials

HR-Prof is a fire retardant treatment for wood and other porous combustible materials

Specified and used extensively in the EU and now here in the UK for timber substrates that require Euro class B Spread of Flame (equivalent to UK class O), HR-Prof is water based ready to use solution that is absorbed into the surface of the substrate.

HR-Proof is a water based fire retardant treatment for wood and other porous combustible building materials. This product is non-hazardous, can be used both internally and externally. Tested to Euro-class B (equivalent to UK class “0”) for surface spread of flame.

The result of the treatment with HR-Prof? Natural, resistant and fireproof wood or porous material!

Trade / DIY benefits

• Water based
• Euro class B Spread of Flame (UK class O)
• Absorbs in to the surface
• Anti-fungicidal properties
• Makes a good fungicide
• No colour or odour
• Non-toxic
• Solvent Free
• Non harmful to the environment
• Internal and external use
• Once dry cannot be broken down by water or humidity
• Does not leach

Trade / DIY applications

• Wood fire retardant
• Porous material fire retardant
• Timber frame building fire retardant
• External wood cladding fire retardant
• Staircase fire retardant
• Truss fire retardant
• Door fire retardant
• Joist fire retardant
• Wooden floor fire retardant
• Stable fire retardant
• Log cabin fire retardant
• Thatch roof fire retardant
• Boat fire retardant
• Fence fire retardant
• Garage fire retardant

How to Step-by-Step

Coverage

HR Prof works on the basis of absorption, not on the number of coats, the absorption rate for HR
Prof on most wood species is 300 gms per m² (270 m/l) 3.7 m² per litre, in the case of Western
Red Cedar the absorption requirement is higher, 400 gms (360 m/l per m²) 2.75 m² per litre.
Application is by Brush, Roller, Spray, Dip or Vacuum.

The rate of absorption will vary dependent on a number of factors ie. wood species, rough sawn
wood, planed all round (PAR) wood, and moisture content, which should be below 20%.
Cut ends should have HR Prof re-applied with a minimum of two coats.

Example: 100 m² of Siberian Larch face area would require the application of 27 litres of HR Prof
plus 5% extra for overspray/spillage, if rough sawn wood, 1 or 2 coats should be sufficient to
absorb the full 27 litres – PAR wood may require 2, 3 or more coats to achieve the same amount of
absorption.

However many coats are applied ALL of the liquid must be used on a given m² face area.
In a factory-controlled environment, the application rate may be governed by weight to assess and
confirm the correct take-up of the liquid.

Product sizes

Available in 1 Litre, 5 Litre and 20 Litre packs.

Downloads

Download HR-Prof data sheet.