Wolfsteins Tonneau Cover Cleaner is a safe yet strong cleaner formulated for fabric and vinyl tonneau covers. This nontoxic, biodegradable cleaner safely removes the toughest stains and soils from your truck's tonneau cover with minimal scrubbing and absolutely no bleach. Tonneau covers of any color will clean up beautifully with Wolfsteins Tonneau Cover Cleaner. Wolfsteins is the company behind RaggTopp convertible top cleaner and protectants. Now they've turned their innovative eye towards tonneau covers with Wolfsteins Tonneau Cover Cleaner. This low-pH cleaner is recommended by Roll-N-Lock, the leader in retractable truck cover technology, and Haartz, the world's leading manufacturer of engineered coated fabrics. Tonneau covers are susceptible to all the oil, dirt, and grease the road has to offer, plus pollen and dust may collect on the cover. Since it's a horizontal surface, the cover may retain dirt more so than the slick sides of your truck. Regular cleaning and protection is vital to the long-term beauty of the tonneau. Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.