Available in 3mL and 30mL.
420 Science Rez Block is a resin preventing water additive. When you add a few drops of Rez Block to your water, it prevents the resins from sticking to the glass and instead they float in the water, allowing you to pour out that gunk along with the ash and other particulates you don't want.
Rez Block is completely organic, which means you'll need to change your water out regularly. With Rez Block and regular water changes, you'll see drastically less buildup in your bong.
*NOTE: DUE TO COVID, PRICES FOR BONG WASHES MAY CHANGE AT ANY TIME AND MAY VARY FROM THE PRICE REFLECTED ONLINE (due to various reasons pertaining to the demand for alcohol). PLEASE CALL THE STORE TO VERIFY THE LATEST PRICE.