Wacker 121 Aquarium Silicone - Black or Clear 300g

Wacker 121 Aquarium Silicone – Black & Clear 300g

Wacker 121 Aquarium Silicone is a high-quality, aquarium-safe sealing silicone designed for constructing, repairing, and sealing glass aquariums and aquatic systems. Trusted by tank builders and serious aquarists worldwide, it delivers strong, flexible, and long-lasting bonds without harmful additives — making it safe for freshwater and marine environments once cured.

Available in black and clear, Wacker 121 allows clean, professional silicone joints for both discreet structural seams and visually refined aquarium builds. Its reliable adhesion to glass and excellent durability make it ideal for aquarium construction, sump assembly, baffles, overflows, and filtration projects.

Suitable for both hobbyist and professional use, Wacker 121 is the preferred silicone for precision aquarium work and long-term aquatic reliability.

Key Features

• Aquarium-safe neutral cure silicone

• Strong, flexible, long-lasting glass bonds

• Suitable for freshwater and marine systems

• Ideal for tank construction and repairs

• Excellent adhesion to glass surfaces

• Professional-grade sealing performance

• Available in black and clear

• 300g cartridge size

Ideal For

• Aquarium construction and resealing

• Sump and baffle installation

• Overflow and filtration builds

• Glass-to-glass bonding

• Custom aquarium projects

• Fishroom fabrication work

Wacker 121 Aquarium Silicone provides trusted, professional-grade sealing performance for aquarium construction and aquatic system builds — delivering clean joints, structural strength, and long-term reliability.