selsil Aquarium Silicone Sealant, Clear 300 ml 2-Pack, Flexible and Solvent-Free

SELSIL Aquarium Silicone Sealant is a clear, flexible sealant for bonding and sealing aquarium glass, made from 100% silicone polymer and formulated without solvents.

• 100% solvent-free and non-toxic formula — made for aquarium glass bonding and use around aquarium organisms.
• Suitable for freshwater and saltwater aquariums — supports projects across both aquarium types.
• Conforms to ISO 11600–F&G–25 LM — provides a defined standard for this sealant.
• Transparent sealant with primer-free adhesion to glass — creates a clear bond without an additional primer.
• Two-pack; size shown as 10.14 fl oz (300 ml) — gives you two units of aquarium silicone sealant.

Building an aquarium, repairing a seam, or securing a decoration calls for a sealant made for glass bonding and aquarium use. SELSIL Aquarium Silicone Sealant is designed for those tasks, as well as sealing seams and stopping leaks on suitable surfaces. Its clear finish is useful where the bond remains visible, while its flexible silicone formulation is intended to maintain elasticity across changing temperatures.

Which surfaces can SELSIL Aquarium Silicone Sealant bond?

It adheres to glass and many other non-porous surfaces, including aluminum and glazed ceramic tile. On glass, it bonds without an additional primer; it also adheres to glass that cures through an acetoxy system. Use it where the joining or sealing surface is non-porous, whether the task is aquarium construction or another compatible sealing job.

• Can also provide insulation for glass, aluminum, and glazed ceramic tile.
• Designed for use on non-porous surfaces rather than porous materials.

How does the sealant handle movement and temperature changes?

The silicone forms a highly elastic, flexible bond. It is resistant to ozone, ultraviolet radiation, and extreme temperatures, and retains its elasticity at both high and low temperatures. The product’s stated performance also includes resistance to cracking, pulling, and discoloration, useful for aquarium seams and other sealed joints that need to remain flexible.

• Flexible silicone helps accommodate movement in a sealed joint.
• Resistance to ozone and ultraviolet radiation supports use in exposed environments.

How long does it take to cure, and when can it be applied?

SELSIL Aquarium Silicone Sealant begins curing within a few hours, while allowing up to 24 hours is recommended for complete curing. Apply it when the application temperature is between +5 °C (41 °F) and +40 °C (104 °F). These timing and temperature details help plan aquarium assembly or repair work around the sealant’s curing process.

• Allow up to 24 hours for complete curing.
• Keep application within the stated temperature range.

This sealant suits aquarium builders and repair projects that need a clear, flexible bond on glass, as well as compatible non-porous surfaces such as aluminum and glazed ceramic tile. It is intended for aquarium seams, leak sealing, and securing decorations, rather than applications on porous surfaces. For those jobs, its aquarium-focused formulation, transparent finish, and flexible silicone bond make it a practical fit.