Penetrating, clear fire-resistant fluid for exterior bare timber such as sleepers, cladding, fencing and decking. Water-based, non-flammable, weather-resistant and safe for use by non-professionals. Provides BS EN Class B s2 d0 and Class 0 fire protection by forming an insulating layer within the wood.

Surface Preparation

• Timber must be clean, dry (max 18% moisture) and bare (min. 12mm thick).

• Remove any stains, paints, varnishes, or waterproofing products that prevent penetration.

• Test a small patch before full application.

Technical Data

• Coverage: 3.5m² per litre total (3 coats @ 10.5m²/litre or 2 coats @ 7m²/litre for rough sawn wood)

• Application methods: Brush, roller or spray

• Drying time between coats: 2 hours minimum

• Fire Rating: BS EN Class B s2 d0, Class 0

• Suitable for: Bare, porous timber surfaces only

• Certificate of Supply available upon request

Directions for Use
Apply 2–3 liberal coats ensuring each fully soaks in before the next. Allow wood to fully dry before any subsequent coating. Do not apply in damp conditions or if rain is expected. Always apply to untreated wood for effective penetration.

Data Sheets

Thermoguard Thermaproof Exterior - TDS

Thermoguard Thermaproof Exterior - MSDS