Weathershield Exterior Quick Drying Satin Water-based A trim product that has the flexibility and durability of the Weathershield system. Up to 6 years lasting protection. Contains fungicide to help protect against the disfiguring effect of mould growth on its film. Colour range Over 620 colours Pack sizes 1L, 2.5L Touch dry 1-2 hours. Recoatable After 2-4 hours. Coverage Up to 20mÃ‚Â² per litre on most surfaces. Thinning This product should not be thinned.