|Extang's Tonno Tonic is a UV protectant and cleaner for specially formulated for vinyl tonneau covers. Not only does it protect the vinyl from harmful UV rays, it also cleans and beautifies in one step.
All vinyl covers will eventually dry out and crack if NOT periodically treated with some sort of vinyl protectant. Although ANY protectant is advisable, all protectants are not the same!!! Petroleum based ones will work, it can void your vinyl warranty if used. This non-petroleum based product is 100% safe for any and all vinyl tonneau materials.
This product is also great for boats and recreational vehicles as well!!