4UANTUM SEAL-High Viscosity Airtight Sealant

Price: $5.74 – $10.90 — In stock at 4 retailers.

Prices last checked August 20, 2026 across 4 retailers.

High Viscosity Airtight Sealant This specially formulated sealant is ideal for fixing or preventing leakage from failing o-rings and rubber gaskets. The high viscosity compound ensures excellent adhesion to further enhance seal integrity. It's rich silicone content also keeps rubber components supple for a longer service life. When applied In pressurized areas such as GBB magazines, 4UANTUM SEAL will penetrate and fill unevenness between valve seals to help the magazines hold a full charge over a longer time. Quantum Industrial Airtight Paste Pen This specially formulated sealant is ideal for repairing or preventing leaks caused by failed O-rings and rubber gaskets. The high viscosity formula ensures excellent adhesion, which can further enhance the integrity of the seal. The rich silicone content can achieve a maintenance effect to keep rubber parts soft and extend the service life. When used on pressure-bearing parts such as GBB magazines, 4UANTUM SEAL can penetrate and fill the unevenness between the valve O-rings to help the magazine stay full longer.

4UANTUM SEAL-High Viscosity Airtight Sealant price comparison: the lowest price is $5.74 at Boomarms, the highest is $10.90, and the median across 4 tracked listings is $7.28. Comparing retailers can save up to 47% ($5.16) versus the highest-priced listing.