When a Quick Rinse Isn’t Enough.

Randy’s Black Label is the heavy-duty cleaner in the ZongGlass cleaning lineup — the one you reach for when regular maintenance hasn’t kept up with a heavily used piece, or when a new-to-you Zong needs a proper reset. Where shake-and-rinse cleaners handle fresh residue fast, Black Label is built for the stubborn stuff: thick resin build-up, darkened chambers, and the kind of grime that resists a standard clean.

The 2-Part Formula

Randy’s Black Label works through a two-component system. The first is a proprietary liquid solution that attacks resin build-up almost on contact. The second is scrubbing particles suspended in the solution — physical abrasion working alongside the chemical action to lift and remove residue that liquid alone would take much longer to dissolve. The two components work together: shake the bottle before use so the particles are fully distributed, apply to your piece, shake again to get the solution into every chamber and kink, let it soak for a few minutes, then rinse thoroughly with warm water.

What It Works On — and What It Doesn’t

Randy’s Black Label is safe and effective on glass, metal, and ceramic. It is not suitable for silicone, plastic, or acrylic — the formula is aggressive enough to damage those materials. It can also remove printed decals or surface art that has not been fully baked into the glass, so avoid prolonged contact with any decorated sections of your piece. Gloves are recommended during use as the formula is not intended for skin contact.

Where It Fits in the ZongGlass Cleaning Range

ZongGlass stocks several cleaners, each suited to a different cleaning job:

Randy’s Black Label sits at the heavy-duty end of the spectrum — faster acting than an overnight soak, more aggressive than a 1-minute maintenance clean. It’s the right choice when the piece needs a genuine reset rather than a routine refresh.

Stocked by the ZongGlass Team

Every cleaner ZongGlass carries has been selected by the same team that has been building Zong bongs in Phoenix, Arizona since 1992. They know what builds up in a Z-kink, what gets stuck in a downstem, and which cleaners actually do the job. Randy’s Black Label is on the shelf because it earns it.