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
- 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
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
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.
Available in 1 Litre, 5 Litre and 20 Litre packs.
Download HR-Prof data sheet.