before using dulux trade weathershield undercoat
To get the best results, ensure surfaces to be painted are sound, clean and dry (new surfaces particularly must be fully dry).
Remove all loose and defective coatings, if necessary stripping back to bare wood. Special precautions should be taken during surface preparation of pre-1960s paint surfaces over wood and metal as they may contain harmful lead.
Remove and treat any mould, algae, lichen or moss with Weathershield Multi-Surface Fungicidal Wash*. Remove defective glazing material, clean the rebates and any loose or open joints. Replace any rotten wood and troublesome knots with new timber.
Thoroughly rub down all surfaces to remove any grey, weathered wood and surface sheen from remaining coatings, and then dust off (refer to your COSHH Assessment). Avoid the inhalation of dust. Wear a suitable face mask if dry sanding.
Apply 1 or 2 coats of an appropriate knotting solution to any remaining knots in the wood.
Prime all bare wood with 1 coat of Weathershield Preservative Primer+ (BP)**, including any new or bare replacement beading. Excess primer should be wiped off surrounding paintwork.