The HW04 undercoat is a white water based undercoat for use over HW01 White Intumescent Coating before applying any proprietary top coat or HW Acrylic white coating.
For internal use only.
HW04 Undercoat is supplied ready for use and does not need thinning. However when applied by spray up to 10% water may be added. Can be applied using brush, roller or spray.
Apply 1 coat at 10 – 12m² per litre. Coating is touch dry in 2 hours.
- Perfect for upgrading existing wooden doors to 30 or 60-minute fire doors – no need to replace them!
- With the use of our primer, coatings can be applied on painted or varnished surfaces with no need to strip them beforehand
- Provides UV protection for external timber surfaces