Professional Intumescent Wood Filler – Natural Finish

The Envirograph Intumescent Wood Filler is a specialist fire-protection filler formulated for use in timber door and frame assemblies. Designed to expand under heat, it seals gaps and voids to maintain the fire integrity of the assembly — while blending seamlessly with natural wood tones for a clean, professional finish.

Key Benefits

• Intumescent action — expands when exposed to heat, sealing gaps to prevent the spread of fire and smoke
• Natural colour — blends with unfinished or light timber, minimising visible repair lines on finished joinery
• Easy application — smooth, workable consistency suitable for filling screw holes, gaps, and surface imperfections. Use a putty knife or scraper to apply.
• Paintable & Sandable — accepts stain, paint, or varnish once cured for a seamless finish
• 250ml tub — practical size for on-site use and small-batch joinery work

Typical Applications

• Filling screw holes and fixing points in fire-rated timber doors
• Sealing gaps in door frames and linings
• Remedial fire-stopping in timber joinery assemblies
• General intumescent repair work on interior woodwork

Supplied by Envirograph, specialists in passive fire protection products. Suitable for use by joiners, fire door installers, and maintenance contractors.