Wacker 121 Aquarium Silicone Sealant – Black (Professional Grade)

High-Strength Silicone Sealant for Aquarium Construction

The Wacker 121 Aquarium 8 is a one-part, acetoxy, high-performance silicone sealant designed specifically for building and sealing aquariums. Trusted by leading aquarium manufacturers, it delivers professional results and long-term durability in high-moisture environments.

Key Features & Benefits

• Premium Thin Film Composite (TFC) silicone formula

• Cures to a flexible rubber at room temperature with atmospheric moisture

• Non-sag, low shrinkage, and easy to tool

• Excellent adhesion to glass, tiles, metals, painted wood & more

• Performs in extreme temperatures (-40 °C to +150 °C)

• Rapid curing: tack-free and crack-resistant

• Black colour for seamless integration in aquarium frames

• Long shelf life and professional-grade mechanical strength

Application Areas

• Construction of aquariums (DIN 32 622 compliant)

• Sealing joints under high mechanical load

• Glazing and industrial sealing applications

• Suitable for both low (+5 °C) and high (+40 °C) working environments

Cartridge Details

• Standard 310ml cartridge

• Fits all standard caulking guns

• Colour: Black

Compatibility & Limitations

Wacker 121 adheres well to:

• Glass

• Tiles and ceramics

• Painted wood

• Select plastics and metals (aluminium, steel)

Avoid use on:

• Natural stone (marble, granite, quartzite)

• Copper, brass, zinc, lead (risk of corrosion)

• EPDM, neoprene, and other organic elastomers

• Concrete, mortar, fibrous cement

• Polyacrylate under stress or insulation glass applications

Always test for material compatibility before use.

Instructions for Use

• Surfaces must be clean, dry, and free of dust, oils, or rust

• Use solvent and lint-free cloth for cleaning

• Cut nozzle to desired bead size and apply in beads or layers

• Requires moisture to cure — curing time depends on temperature, humidity, and airflow

Safety Guidelines

• Use only in well-ventilated areas

• Avoid contact with skin and eyes before curing

• Keep away from children

• Refer to Material Safety Data Sheet for full handling instructions