Thermoguard Fire Varnish 2K Basecoat

Thermoguard Fire Varnish 2K Basecoat a two-component base coat suitable for use under Thermoguard Fire Varnish Overcoat on interior and exterior wood for 30 - 60 minute protection against fire.

Best Uses

Thermoguard Fire Varnish 2K Basecoat can be specified as part of the Thermoguard Fire Varnish 30 & 60 Minute Systems.

All Thermoguard Fire Varnish Systems are made up of Thermoguard Fire Varnish Basecoat (a two component, waterbased product consisting of a base and activator mixed together before use which is a clear, intumescent varnish to be finished with the appropriate Fire Varnish System.
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

2023 compliant BS EN Class B s2 d0 as well as BS Class 1 and Class 0 Surface Spread of Flame.
Note for 30 or 60 minutes Fire Resistance contact Thermoguard and request a Thermoguard Fire Varnish 30 & 60 Minute System Specification.

Example Specification For Interior Use

Prepare and apply:

• 1 coat of Thermoguard Fire Varnish 2K Basecoat
• 1>4 days after Basecoat is dry, apply 1 coat of Thermoguard Fire Varnish Overcoat Matt or Satin Clear or 2 coats of Thermoguard Fire Varnish Overcoat Matt or Satin for Woodstain Colours

Example Specification For Exterior Use (DAMP ENVIROMENTS, HIGH WEAR AREAS or FRUITWOODS)

Prepare and apply:

• 1 coat of Thermoguard Fire Varnish 2K Basecoat
• 1>4 days after Basecoat is dry, apply 2 coats of Thermoguard Fire Varnish Overcoat Matt / Satin Clear or Woodstain Colours

Application

Timber must be clean and thoroughly dry prior to application. Ensure no surface contaminates are present ie: oils or wax’s including white spirit. Maximum 18% moisture content. Maximum relative humidity RH 75%. Ensure adequate ventilation. Minimum air temperature 6°C. Minimum surface temperature 3°C above dewpoint – avoid condensation. Gaps should be closed to prevented Fire from accessing unprotected wood surfaces. For external applications it is recommended wood has been sealed on the reverse face to stop water ingress. NOT suitable for the topside of floor surfaces that will be trafficked/walked on.

Cover, countersink & fill, or use non-ferrous, galvanized, stainless or sherardized fittings. Ensure surfaces are dry, clean and free of all contamination. Varnished, sealed or non-porous wood should be abraded thoroughly with medium grade silicon carbide abrasive when dry to provide a good key. Wipe down with a damp cloth to remove dust. For application to OSB/Sterling Board please contact our Technical Team for advice. Thermoguard Fire Varnish Basecoat should only be applied to dry wood, with dry conditions during application.

After mixing, allow to stand for 30 - 60mins before use.

Apply to a small test area before applying generally. Use within 4 hours of mixing. Apply 1 or 2 coats, ensuring the correct amount applied relative to the coated area. Ensure good air movement & ventilation with dry conditions before and during the application, until over-coated.

Minimum drying time 8 hrs. Ensure the basecoat is hard dry at the time you apply the overcoat. Drying time of the basecoat in good conditions is overnight. Once the basecoat has hard dried, it remains ideal to overcoat for a further 4 days. Thereafter, the basecoat becomes gradually harder, until it reaches a point where the overcoat may not obtain a good bond. Thermoguard therefore recommend overcoating when basecoat is dry, within the following 4 days in good conditions.
Note: The longer the delay beyond '4 days after basecoat has dried' (so typically 5 days after application), the greater the risk of overcoat delaminating.

If overcoating is delayed notably beyond 7 days after the basecoat was dry, it is advised; Basecoat is abraded to obtain a key with 120 grit abrasive. Apply a light coat of basecoat to replaced material removed during abrasion. Apply overcoat within the ideal window or as near to it as possible.

IMPORTANT INTUMESCENT PRODUCT NOTE: Always contact Promain’s technical team prior to purchase to obtain a tailored project specification and the advice necessary. The information displayed on this website should only be used as a guide. Promain UK Limited will not be held liable for any resulting damage to property, human life or monetary costs incurred due to incorrect specification, preparation, application or maintenance that has occurred due to negligence by either the purchaser or applicator. This includes your failure to have contacted us to obtain the relevant advice/specification.