Wacker 121 Aquarium Professional Silicone Sealant Clear

Specifically designed for aquariums. Used by major aquarium manufacturers.

Product description

WACKER 121 - AQUARIUM 8 is a one-part, acetoxy high performance silicone sealant for construction of aquariums.

Properties

WACKER 121 - AQUARIUM 8 cures at room temperature in the presence of atmospheric moisture to give a permanent flexible silicone rubber.

Special features

• Long shelf life

• Non-sag

• Excellent tooling characteristics for professional

  use

• Readily gunnable both at low (+5 °C) and high

  (+40 °C) temperatures

• Rapid crosslinking: quickly becomes tack-free and

  crack resistant

• Flexible at low (-40 °C) and high temperatures

  (+150 °C) following cure

• Low shrinkage on curing

• Special high-viscosity paste

• Excellent mechanical properties

Application

• Sealing of joints exposed to high mechanical loads

• Sealing of joints which need to quickly build up

  mechanical strength

• Suitable for glazing and industrial applications

• Especially suitable for the construction of aquariums which meet the requirements of DIN 32 622. Ensure bond thickness is at least 1mm. For this specific application the temperature should be between +15 °C and +40 °C.

Adhesion

WACKER 121 - AQUARIUM 8 exhibits excellent primerless adhesion to most non-porous siliceous materials (e.g. glass, tiles, ceramics, enamel, glazed tiles); metals (e.g. aluminum, steel, zinc or copper); impregnated, varnished or painted wood; and some plastics.

Users must carry out own tests due to the great variety of substrates.

The adhesion can be improved in many cases by pretreatment of the substrate with a primer.

Processing

The substrate areas that will be in contact with the sealant must be clean, dry and free of all loose material such as dust, dirt, rust, oil and other contaminants. Non-porous substrates should be cleaned with a solvent and clean, lint-free, cotton cloth.

Remove residual solvent before it evaporates with a fresh clean, dry cloth. For application from cartridges cut thread open, fix nozzle on top and cut to required bead size. The sealant can be applied in beads or layers. It requires moisture in order to cure.

The curing time can take longer at lower temperatures, lower humidity or by low volume of air exchange.

Restrictions on use WACKER® 121 - AQUARIUM 8 should not be used on substrates such as marble, concrete, fibrous cement and mortar, as the product releases acetic acid during curing.

WACKER® 121 - AQUARIUM 8 should not be used in contact with metals such as lead, copper, brass or zinc
due to corrosion.

WACKER® 121 - AQUARIUM 8 may be discolored in contact with some organic elastomers, e.g. EPDM and
neoprene.

WACKER® 121 - AQUARIUM 8 is not suitable for applications involving contact with natural stone, such
as marble, granite, quartzite, as it can cause staining.

WACKER® 121 - AQUARIUM 8 is not suitable for insulating glass applications.
WACKER® 121 - AQUARIUM 8 should not be used on pre-stressed polyacrylate elements as it may cause
environmental stress cracking.

It is the responsibility of the user to test the compatibility of the sealant with the adjoining materials.

Incompatible substances like coatings or organic plasticizers can lead to discoloration of the sealant. Cleaning agents and gaseous emissions can damage the sealant in its function or change its appearance. WACKER  cannot make a general statement to the compatibility of all these varying materials with the sealant. In case of doubt the user shall conduct appropriate preliminary tests.

Storage

The 'Best use before end' date of each batch is shown on the product label. Storage beyond the date specified on the label does not necessarily mean that the product is no longer usable. In this case however, the properties required for the intended use must be checked for quality assurance reasons.

Packaging

WACKER® 121 - AQUARIUM 8 is usually supplied in standard size cartridges that fit all standard caulking
guns.

Safety notes

Comprehensive instructions are given in the corresponding Material Safety Data Sheets. 

During vulcanization acetic acid is released. These vapors should not be inhaled for long periods or in high
concentration. Hence, good ventilation of the work place is necessary. Should uncured silicone rubber
come into contact with eyes or mucous membranes, the affected area must be rinsed thoroughly with water
as irritation will otherwise be caused. Avoid prolonged contact of uncured sealant with the skin - use a dry
cloth or paper to remove it.

Keep out of reach of children.

Cured silicone rubber, however, can be handled without any risk to health.