Need help? Ask an expert

01540 673 648

My lightbox (0)
Add products to lightbox to review choices & request samples

If on-site application of a fire retardant solution is preferred, Russwood would recommend usage of HR Prof, a clear fire retardant treatment for timber cladding available to buy from our online shop.

The Treatment

HR-Prof has non-flammable properties which restrict ignition and the spread of flame. It will not wash out once dry, it is not converted into smoke when exposed to high temperatures, and carbon char is restricted to the immediate area.

Materials treated with HR-Prof, when exposed to temperatures of up to 1700°C, are subject to charcoal forming, restricting the spread of flame.

The Benefits

  • Leach-resistant

    The treatment is leach-resistant, meaning that it can be used without a protective coating, allowing the cladding to weather naturally over time

  • No re-application

    Reapplication of the treatment will not be required during the life of the timber

  • Non-corrosive

    Timber treated with HR-Prof does not react with stainless steel nails

  • Colourless, odourless, non-toxic and solvent free

    This is a water-based solution which can quickly and easily be applied on-site and will not affect the look of the timber once dry

  • Fire protection

    Dramatically slows down fire spread and reduces heat and smoke generation, saving lives and restricting fire damage costs

Timber Suitability

With the exception of Accoya®wood and Thermopine, all other Russwood timber cladding species are suitable for treatment with HR-Prof. In general, HR-Prof should not be used on any modified wood, although this is primarily due to the fact that test data on this does not exist yet, as opposed to the treatment being ineffective in these instances.

HR-Prof & Painting

It is possible to paint and fire-retardant coat a building, but it should be noted that the HR-Prof fire retardant should always be applied first. The timber can then be painted, but only with a compatible paint that does not compromise the fire retardant’s properties - please speak to us for further information about painting. 

Due to the fact that HR-Prof is an on-site treatment which should be applied before the paint, it is not possible to combine this treatment with our vacuum coated cladding range.

European Standards

HR-Prof is suitable for timber substrates that require Euroclass B or C Spread of Flame (equivalent to UK Class 0) but please note that it does not meet a time-based rating.

The Product

To purchase HR-Prof, and for usage information, please visit our online shop.

PDF Download

Download the Fire Retardant UK HR-Prof factsheet.