ASI Black Aquarium Silicone Sealant Cartridge – 5 Pack (10.2 oz each)
Building or repairing an aquarium requires the right sealant, and this product is specifically designed for the task. The Black Aquarium Silicone Sealant Cartridge bonds tightly to glass without the need for primers, creating a secure and reliable seal.
Once cured, the sealant is completely safe for fish and remains stable underwater without losing strength. It is suitable for both freshwater and saltwater tanks, as well as vivariums.
The formula does not slump, allowing for clean application on vertical surfaces. It holds its shape during use and cures into a strong, flexible rubber that ensures a watertight bond.
| Specification | Detail |
|---|---|
| Package Size | 10.2 oz per cartridge (5 cartridges) |
| Application Surface | Glass, acrylic |
| Curing Time | 24 hours to full cure |
| Compatibility | Freshwater, saltwater, vivariums |
| Primer Required | No |
FAQ
Can this sealant be used on acrylic tanks?
Yes, the sealant is compatible with both glass and acrylic surfaces.
Does the sealant need to be primed before application?
No primer is required for this silicone sealant.
Is the cured sealant safe for fish?
Yes, once cured, the sealant is completely safe for fish and can remain underwater without degradation.




Piers Butler –
Used this sealant to repair a cracked glass corner in my 55-gallon tank. It bonded well without any primer and stayed put even after several weeks of water exposure. No leaks detected. Very easy to apply and clean up.
Benjamin Vaughan –
Great for sealing joints in a new aquarium build. Applied on vertical surfaces and it didn’t slump. Cured quickly and holds water tightly. Works well in both freshwater and saltwater setups.
Warren Mitchell –
Works as expected for sealing tank joints. A bit slow to cure, but once set, it’s strong and flexible. No fish issues after use. Would recommend for aquarium repairs.
Faith Paterson –
Perfect for fixing a small crack in my vivarium. Applied cleanly, no drips, and it stayed firm after 30 days in water. No smell or residue. Very satisfied with the performance.