Safewalls Drywall Plaster Primer is a specialist water-based primer designed to seal bare drywall and unsealed plaster ahead of fire protection systems. It ensures a sound, clean base for Thermoguard Safewalls and Wallcoat systems, helping achieve BS EN Class B and legacy Class O fire ratings. Ideal for educational, healthcare, commercial and residential environments where fire safety is critical.

With over 1,400 shades available from RAL, BS, NCS and the Thermoguard Select range (with Light Reflectance Values), it supports colour-contrast planning under the Equality Act 2010.

Surface Preparation

• Ensure surfaces are dry, clean and well adhered.

• Good ventilation is essential.

• Avoid applying if condensation is likely during drying.

• Do not apply below 8°C or above 30°C. Surface temperature must be 3°C above dew point.

• Max RH: 75%.

Technical Data

• Type: Water-based emulsion

• VOC: Low – 16 g/l (EU limit: 140 g/l, Cat A/i)

• Finish: Matt

• Drying Time: Touch dry in 1 hour; fully dry after 4 hours (at 20°C)

• Pack Sizes: 50m² & 125m² kits

• Coverage: 10–12.5m² per litre

Directions for Use

• Application Tools: Short-pile roller or synthetic brush. For spray: Airless (e.g. Graco 1500/3500) or conventional pressure pot system. Thin with 5% water for spray.

• Coats Required: 1 full coat

• Cleaning: Clean tools immediately with water. Avoid letting product dry on equipment.

• Storage: Store between 5°C and 30°C in a dry, secure space. Do not allow to freeze

Data sheets / Downloads

Thermoguard Safewalls Drywall Plaster Primer - TDS

Thermoguard Safewalls Drywall Plaster Primer - Brochure