Thermoguard Thermoproof Exterior Fluid is a penetrating fire proof fluid for wood.
Fire protection for bare timber sleepers, fencing, cladding and decking.
Durable clear fire and flame resistant fluid for external and internal wood. Weather resistant. Water-based, non flammable formula enables safe application by untrained and inexperienced users.
How it Works
Penetrates deep into porous wood. When exposed to fire Thermoguard Thermoproof Exterior Fluid creates an inert layer within the wood’s surface which insulates the wood from fire, preventing flamespread.
UKAS Fire Test Standards
- BS EN Class B s2 dO
- Class O
For 30 or 60 mins contact Technical Dept.
- Apply at 3.5m² per litre. Normally applied in 3 coats @ 10.5m² per litre but can be applied in 2 coats at 7m² per litre on very porous rough sawn wood.
- Ensure each application has fully soaked in before applying the next. Allow a minimum of 2 hours between applications.
- Apply to small test patch prior to main application.
19m² per 5L / 76m² per 20L
Brush, Roller, Spray.
- Apply to dry wood (below 18% moisture) above 5°C in dry conditions prior to painting or waterproofing. Where possible wait until the wood has thoroughly dried out before fixing.
- Allow adequate time for the wood to dry out after treatment before applying any coating.*
*Contact the Technical Department.
Limitations (Stained, Varnished or Painted Wood)
- For treatment with Thermoguard Thermoproof Exterior Fluid to be effective it needs to be able to penetrate the wood.
- Remove any water resistant coating, sealer coat, waxy feel, glossy sheen, or waterproofing effect created by a previous treatment or preparation before application.
Project Fire Certification
Thermoguard issue a Certificate of Supply on request for projects for insurance, Fire and Building Control Authority and Client Records.
New Fire Regulations & Tests Explained
- The new fire standard BS EN test lasts 20 mins. with airflow replaces the old BS 476 tests which lasted 10 mins and strangely restricted airflow.
- The new standard for flamespread and heat release Class B replaces Class O.
The new BS EN tests also monitor -
- Smoke & Gas “s” – s1 + s2 are none or very low & compliant, s3 = moderate smoke, s4 = heavy smoke.
- Flaming Droplets or Airborne particulates – dO is none, d1 = low, d2 = moderate, d3 = high levels.