No one likes smoking from a water pipe that's coated in resin and that's a fact. To keep your water pipes clean, use 420 Science RezBlock Concentrate! 

RezBlock is designed to prevent resins from sticking to the inside walls of your go-to water pipes. The resins will stay in the water, allowing you to simply pour it out when you're done with your session. What's even better, it's made with 100% organic ingredients, including fruit extracts, vegetable glycerin, citric acid, and purified water so it won't impact the taste of your herbs and concentrates. 

To use, just add a few drops into your piece with every water change and enjoy fresh, clean and delicious hits every time. The XL size contains 30ml and is perfect for heavy users, a standard 15ml bottle is a good option for weekend-smokers while the small offers 3ml, perfect for testing and carrying around.