RezBlock Concentrate is an all-natural concentrate solution that you add to the water in your clean water pipe. RezBlock will prevent resin from sticking in all areas the mixture is touching. RezBlock is made from organic ingredients - all of which you can buy in a health food store. The complete ingredient list is not disclosed because it's a proprietary blend. Fruit and vegetable extracts make RezBlock along with salt, which acts as a preservative and food coloring to make it look pretty. There are no chemicals or other ingredients that would be unsafe for human consumption.