420 Science RezBlock Concentrate Resin Preventer, 30ml

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Resin Blocker

There’s something about a water pipe coated with resin that just makes us feel dirty. That’s why we change our water every day. But that’s not all. Not by a long shot. We also use RezBlock. Just a few drops help prevent the resin from building up. It keeps our pieces clean, and our hits fresh and delicious.

When you add RezBlock 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. RezBlock is completely organic, which means you'll need to change your water out regularly. With RezBlock and regular water changes, you'll see drastically less buildup in your bong.


  • Up to 120 uses per bottle
  • Contains fruit extracts, vegetable glycerin, purified water, citric acid
  • Won't affect the taste
  • Just a few drops needed with every water change

3 Reviews

  • 5
    Amazing with ash/dry catcher

    I have a dry catcher on my Sheldon black and I use this for the beaker's water. I literally never have to clean the piece because the rezblock prevents any resin buildup and all the ash stays in the dry catch. Would strongly recommend

  • 5
    Keeping all my glass clean!

    Just grow a few drops in your freshly filled glass piece and expect no more res! Say bye to your best friends, alcohol and salt!

  • 3
    Does block resin, does have a weird taste

    I tried using this stuff for my dab rig and while it does stop resin for coating the inside of the rig it made my dabs taste funny. It's sort of a citrus taste, it was off putting enough for me that I stopped using this stuff, but some people don't seem to mind it at all.

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