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Some say ... We are the polymer-free choice for fire-retardant wood.
At WOODSAFE® we say ... Too bad for you. We do this because we know that polymer-based fire retardant wood has proven for decades to be by far the safest choice on the world market. 

WOODSAFE® WFXTM is unique and the only fire retardant system in Europe with approved properties for outdoor use without the need for surface treatment according to EN16755 EXT. We have worked for over 30 years with fire retardant treatment and we know what works and what doesn't.


Let yourself be inspired by WOODSAFE® WFX™



Protecting your next project with WOODSAFE® WFX natural ageing

This unique fire retardant treatment is available for several different species, including red cedar, yellow thuja, shingles, thermally modified pine, spruce, radiata pine, ash, accoya, abodo, nobelwood, ayous, frake, spruce, douglas fir, core pine, larch and more.

WOODSAFE® WFX fire retardant manufacturing is covered by a type approval certificate according to the Swedish Housing Agency's building regulations, Plan and Building Act (SFS 2010:900) and construction product regulation 305/2011, EN14915 with associated continuous manufacturing control by RISE (0402). Document reference TG0263-08, CPR-0402-SC0260-15.

WOODSAFE® Exterior WFX™ fire retardant treatment is the only FR-product on the market certified according to EN16755 EXT and ASTM D2898, which is directly decisive for the suitability of installing fire-impregnated wood in an exterior environment without a protective paint layer, making the product an excellent choice for facade cladding to age naturally without maintenance


Technical characteristics

Technical characteristics

  • Unique polymeric formula for long lasting performance in exterior and high humidity environment.
  • Reaction to fire: B-s1,d0. (-s2)
  • Facade cladding: SP-Fire 105
  • Durability of Fire Performance EN16755 INT1, INT2, EXT
  • LR-resistance (Wood Protection Association, UK) 
  • Approved facade cladding* with Rockwool, Isover, Kooltherm, Finnfoam
  • Approved substrate* such as; Euroclass D CLT, 3-layer CLT board, Spruce plywood
  • Meets the requirements for E1 (EN717)

*Contact us for more information

General information

General information

In our impregnation process, the wood and the wood product are wetted in their entirety, and depending on the product, 2-15% by weight of fire retardant is pressed deep into the cell structure of the wood, where it is fixed.

The combination of moisture and drying means that an initially finished planed, sawn or processed wood product can become slightly crooked and warped compared to untreated wood. The better the quality of the wood product, the better the final product.

In the fire impregnation process, the wood is soaked with water mixed with fire impregnation agent, and then dried. The impregnation process also means that dimensional changes depending on the type of wood and plywood can occur, even within the framework of the same quality grading, which can result in the wood material's dimensions changing differently.

Dimensional change may deviate from planing tolerance and plywood tolerance, which is considered ok because the impregnation process takes place after planing and the production of plywood. It is the responsibility of the client/customer to take these conditions into account when ordering Woodsafe's contractor impregnation services through partners.


The market's No. 1 fire retardant impregnation for exterior "Durable Fire Protection" natural aging


Is WOODSAFE® Exterior WFX™ organic fire protection?

Is WOODSAFE® Exterior WFX™ toxic?

Can WOODSAFE® Exterior WFX™ be used indoors?

Can WOODSAFE® Exterior WFX™ be surface treated?

Does WOODSAFE® Exterior WFX™ contain substances included in the REACH CLP list?

Can I treat with silicon such as Organowood, Sioox, iron vitriol?

Can fire retardants based on iron phosphate, di-ammonium, ammonium phosphate be compared to WFXTM's maintenance-free properties?

Is WOODSAFE® Exterior WFX™ type-approved?

Is WOODSAFE® Exterior WFX™ CE certified?

Can I buy the product directly from you?

Does WOODSAFE® Exterior WFX™ have fire resistant properties?

Does WOODSAFE® Exterior WFX™ contain hygroscopic substances such as ammonium phosphate?

What sets WOODSAFE® Exterior WFX™ apart from other fire retardants?

Some operators claim that their product is maintenance-free because the type of wood is impregnated, is that correct?

About WOODSAFE® Exterior WFXTM

See this short video presenting more information about the WOODSAFE® Exterior WFX™ product.