2 Pack 420 Science RezBlock Concentrate Resin Preventer, 30ml (60ml)

It only protects the glass where the water is and keeps that part very clean

I've been using Rez block for over 10 years and plan on using it for many years to come. In the beginning it was green and not concentrated but worked as advertised cleaning my smoking glass. The newer upgraded concentrated solution works excellent also keeping my smoking glass sparkling clean.🛀

I like the fact it prevents with it. Rather than being a dirty water pipe, also that would become quickly Rez out. Wish the solution to get an update last more than three days. I use 10 drops in my water pipe. The bigger one gets 14

Only used for water pipes or other rigs that require water, works very well to keep resin off of the sides and instead floating on the surface of the water. 2 pack is convenient and affordable

Use this and some piece water bong is guaranteed to come out spotless

At the price it is I feel bad, using it in my bong because 3 to 4 days later, I end up dumping it out and putting more than I need into my b0ng

Excellent product! I've been using rez block for.over a year now and it really works in keeping you glass clean and usable with only a good rinse out.

Really pleased with the value & fast service. Everyone who uses a water pipe should use rezblock. Especially a nooks and crannies water pipe. Very helpful.