Dulux Trade Weathershield Undercoat Dark Grey 5 Litres

Amazon

Flexes with the wood to prevent cracking. Provides good build and excellent opacity. Can be used on primed metal such as garage doors. Coverage:Up to 16m² per litre on most surfaces Colour: Dark Grey, Weight: 15.211896078 Pounds, Manufacturer: Dulux Trade

Freshlick

?A solvent-based undercoat for exterior wood and wood trimUp to 8 years weather protectionIncreases opacity and sheen