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Thermoguard Fire Varnish Overcoat (Interior)

excl tax

Thermoguard Fire Varnish Overcoat (Interior) is a water based, clear UV and wear resistant varnish:

  • The final coat of a 2 coat Thermoguard system
  • For the decorative Fire Protection of timber and timber derived substrates to Class 1, Class 0, EN Class B s2 d0.
  • See Thermoguard Fire Varnish 30 & 60 Minute System for 30 or 60 minutes Fire Resistance
  • Clear or coloured stain options available

Please Select An Option


Product Description

Intended Use – Clear Fire Protection Overcoat for Fire Varnish System for Interior Wood

Thermoguard Fire Varnish is a clear varnish system for the Fire Protection of timber and timber derived substrates to BS Class 1 and Class 0 Surface Spread of Flame as well as BS EN Class B s2 d0 (For 30 or 60 minutes Fire Resistance see Thermoguard Fire Varnish 30 & 60 Minute System). The special formula provides a tough, durable finish to internal wood (for exterior surfaces see Thermoguard Fire Varnish Overcoat (Exterior)). The clear finish enhances the natural beauty of the wood while providing protection against UV and wear as well as fire protecting new and previously varnished surfaces.

The Thermoguard Fire Varnish System is made up of Thermoguard Fire Varnish Basecoat which is a clear, intumescent varnish to be finished with Thermoguard Fire Varnish Overcoat (Interior) or Thermoguard Fire Varnish Overcoat (Exterior) in a clear matt or satin finish (a gloss finish is available in both interior and exterior versions in batch quantities for large projects). The Thermoguard Fire Varnish Overcoats provide protection against UV, weathering (exterior grade) and wear whilst Thermoguard Fire Varnish Basecoat provides the Fire Protection.

Intumescent Fire Protection

When exposed to fire, the Thermoguard Fire Varnish System expands to create an insulating barrier, protecting timber surfaces from flames, heat and oxygen and suppressing emission of deadly smoke & gasses.

Specification and Application

Prepare and apply – (INTERIOR)

1 coat of Thermoguard Fire Varnish Basecoat1 coat of Thermoguard Fire Varnish Overcoat (Interior) Matt or Satin



1 coat of Thermoguard Fire Varnish Basecoat2 coats of Thermoguard Fire Varnish Overcoat (Exterior) Matt or Satin


Available Pack Sizes

Thermoguard Fire Varnish Basecoat is available in 20m² packsThermoguard Fire Varnish Overcoat (Interior) is available in 20m² and 80m² packsThermoguard Fire Varnish Overcoat (Exterior) is available in 20m² and 40m² packs


Applicators should also refer to instructions on product containers.

Previously Varnished and Stained Surfaces or Wood Preservers

The Thermoguard Fire Varnish System can be applied over firmly adhered standard clear varnish. For existing stained varnishes, stain coatings, old fire coatings or if in doubt, contact our Technical Department on 0113 2455450.

If preservatives are required, use rapid drying clear non waterrepellent grades**.For tanalised or other preservative treatments, contact our Technical Department.


**Allow adequate time for stain or preservative fluids to escape before applying the Thermoguard Fire Varnish System.

Product Performance

Fire Test Standards and Certification

BS EN Class B s2 d0Class 1 and Class 0

Popular Categories

Fire Retardant Coatings
Passive Fire Protection for Electrical
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