Cracked Glass Bong Repair: Simple 5-Step UV Resin Fix

Here’s the exact bong crack repair guide Fordee followed in the video:

Step 1: Locate and Assess the Crack

Hold the bong up to a bright light and rotate it slowly. The crack near the perc was visible as a thin line running a couple of inches. Mark the endpoints lightly with a felt-tip marker so you don’t miss them when applying resin.

Step 2: Clean and Dry the Surface

Use isopropyl alcohol on a paper towel to clean the cracked area thoroughly. Let it dry completely — this usually takes 2–3 minutes. Any moisture will weaken the bond and your UV resin glass repair won’t last.

Step 3: Apply the First Coat of UV Resin

Using a disposable brush, apply a thin coat of UV resin over the crack. Work slowly and make sure the resin gets into the crack itself, not just over the surface. Keep the bong still so the resin doesn’t run.

Step 4: Cure with UV Light

Shine your UV flashlight directly over the resin for 60–90 seconds. You’ll notice the resin turn from tacky and translucent to firm and clear. Once cured, run your finger over it — it should feel hard and smooth, not sticky.

Step 5: Add Additional Layers and Test

Fordee added a total of 4 layers, curing each one before adding the next. After the final coat, he filled the bong with water and checked for leaks. The result? The crack held up, and the bong passed the water test. He even took a couple of hits to confirm airflow was unaffected.

Bong Repair Epoxy vs Resin — Which Is Better?

People often debate bong repair epoxy vs resin when faced with a cracked glass water pipe. Here’s a quick comparison:

UV resin wins on speed and clarity. Epoxy wins on heat resistance. For a water bong (no direct flame on the repaired area), UV resin is the better practical choice for a cracked glass bong repair.

Is UV Resin Safe to Smoke Through?

This is the big question with any glass water pipe repair. Once UV resin is fully cured, it is generally considered inert and non-toxic. However, Fordee’s approach — applying it on the exterior of the glass only, not the interior — is the safest method. The crack was on the outside surface, so the resin never makes contact with smoke or water inside the chamber.

Important safety note: Always wash your bong thoroughly after any repair before using it. Let the repair cure for at least 24 hours even after UV curing is complete, to ensure full off-gassing. If the crack is on an interior surface, consider replacing the piece instead.

Did the Cracked Bong Repair Actually Work?

Short answer: yes, for now. The cracked glass bong repair held up through the water test and a few sessions. Whether it will hold long-term under repeated thermal stress remains to be seen. Fordee’s honest take: it’s a temporary fix that bought the bong some extra life, not a permanent solution. If the crack reappears or spreads, it’s time to retire the piece.