Cabots Deck Clean is for exterior use on decking, pergolas, weatherboard and exposed outdoor timber. This essential preparation product cleans and rejuvenates new and old exterior timber surfaces prior to an application of a top coat of oil, stain, paint or exterior varnish. Its deep-cleaning formula removes dirt, grime, and weathered wood fibers, preparing the surface for recoating or staining. Designed to revitalise and clean grey, weathered and soiled timber, it also removes naturally occurring tannins from new timber while eliminating mould and other contaminants.