Starbrite Sail and Canvas Cleaner Biodegradable formula safely cleans and brightens all types of white and colored sailsfabrics. Concentrated formula removes dirt, grease and light mildew stains from all types fabric. Will not weaken fabric or threads. Great for Boat Covers, bimini tops, and nylondacron sails. Cleans and brightens whites and colors Concentrated formula Safe and easy to use Removes dirt, grease and mildew stains Does not weaken fabric or thread Also cleans nylon or dacron sails H