BISSELL wash & protect 2x concentrated carpet cleaning formula with Scotch Gard protection is a dual action formula that deep cleans and protects in one easy step. The BISSELL Wash & protect carpet shampoo is universal, having been laboratory tested and found safe to use in BISSELL, Vax and all other brand full size carpet cleaners, even rental machines. If you want to get the best possible results from your carpet cleaning machine, you owe it to yourself to try our best ever carpet shampoo ever.