PURPLE TUFF ® is the Most Powerful Degreaser & Multi-Purpose cleaner you can buy! Purple Tuff ® is a concentrated degreaser, you can custom dilute PURPLE TUFF ® to clean just about anything. It replaces most cleaners, detergents, degreasers and solvents you’re using now! It is non-toxic and biodegradable, making it safe for the environment.