Benjamin Moore Composite Deck Cleaner is a safe, low-VOC, biodegradable cleaner for composite and PVC decking, railings, furniture and fences. It can also be used as a general cleaner for most exterior surfaces to remove dirt, mold and mildew stains, algae, grease and oil. It is excellent for preparing decks, railings and fences for staining with ARBORCOAT solid stain (640). (Available in 3.5-lb. containers.)