WACKER® GM - Glazing and Metal

1 of 217 products in this brand
WACKER® GM - Glazing and Metal is a one-part, neutral-curing, low modulus silicone sealant with excellent adhesion and a long shelf life. It is designed for sealing, bonding, and repairing various tasks. WACKER® GM - Glazing and Metal cures at room temperature when exposed to atmospheric moisture, forming a durable and flexible silicone rubber.

Product Type: 1K (1 component) Sealant

Application Area: Sanitary Wares

Compatible Substrates & Surfaces: Metal

Cure Method: Chemical Cure

Chemical Family: Silicones

Technical Data Sheet

Knowde Enhanced TDS

Identification & Functionality

Chemical Family

Features & Benefits

Applications & Uses

Application Area
Compatible Substrates & Surfaces
Cure Method
Applications
  • General Purpose, Sanitary & Natural Stone
  • Perimeter Sealing
Application Details
  • WACKER® GM - GLAZING AND METAL is supplied as a paste-like, one-component, ready-to-use material. It may be gunned at temperatures ranging from +5 °C to +40 °C and can thus be used in any climate.
  • WACKER® GM - GLAZING AND METAL is readily applied to most types of glass (laminated, coated, uncoated), ceramic tiles, glazed tiles, enamel, to metals such as steel, copper, zinc, lead, brass and impregnated, varnished or painted wood, and to plastics such as PVC, epoxies, polyester and many other materials. However, as surfaces vary greatly from application to application, it is best to carry out preliminary adhesion and compatibility tests before use.
  • WACKER® GM - GLAZING AND METAL is compatible with all cured one-component silicone sealants. Where two or more different sealants are used, allow the first to cure completely before applying the next. Joint design and dimensions Window glazing regulations are given in DIN 18 545. In the construction field, the minimum joint width is 10 mm so as to allow proper application and tooling of the sealant. The sealant bead should be no thicker than 15 mm and the ideal ratio of joint width to depth is 2:1 . In any case, the minimum joint width must be four times the expected movement. For deep joints, it is best to use polyethylene or polyurethane foam backing material (backer rods). If joints are too shallow for backing material to be employed, we recommend using a polyethylene tape (see Fig. 2). This acts as a release film (bond breaker), allowing the joint to move and the silicone to stretch freely. Surface preparation WACKER® GM - GLAZING AND METAL should only be applied to surfaces which are clean, dry, free of all loose material, dirt, rust, or oil and other contaminants.
  • Cleaning: Contaminated surfaces may be cleaned mechanically, if porous, or with a solvent if nonporous. Glass may be cleaned with water containing a surfactant or with a solvent. In the latter case, apply the solvent with a clean, oilfree, lintfree cloth. Remove residual solvent with a fresh, clean dry cloth before it evaporates.
  • Caution: Always follow the recommendations and instructions provided by the solvent manufacturer. As solvents are usually flammable, keep them away from heat, naked flames or sparks. Ensure adequate ventilation. Do not inhale solvent fumes or allow solvent to remain in contact with the skin for prolonged periods.
  • Primers: Ceramic tiles, enamels and glass do not usually require priming. To determine if priming is necessary, apply a bead of WACKER® GM - GLAZING AND METAL to the substrate and test its adhesion.
  • Masking and Tooling: Masking tape affords a simple means of protecting critical areas beside joints from contact with the sealant. Do not allow the masking tape to touch the clean faces of the joint. Tool the sealant immediately after application and remove the tape before a skin forms.
  • WACKER® GM - GLAZING AND METAL is a sealant designed for low stress connection, expansion joints in the building industry and for low stress perimeter joints. It is especialy suitable for sealing and mending tasks in case of contact with metals, plastics or alkaline substrates. The sealant can be applied by either hand or machine to seal expansion joints and connecting joints in a wide variety of materials, such as glass, coated glass, ceramic tiles, enamel, painted surfaces (wood and others), aluminum, steel and many plastics.

Properties

Cured Properties
ValueUnitsTest Method / Conditions
Elongation (at break)250%ISO 8339
Modulus (at 100 % elongation)0.37N/mm²
Movement Capability20%ISO 11600
Shore Hardness A24ISO 868
Tear Strength3N/mmISO 34, Method C
Tensile Strength0.5N/mm²ISO 8339
Uncured Properties
ValueUnitsTest Method / Conditions
Consistency (at 23°C)Non-sag
Curing Rate (at 23°C, 50% r.h)2mm/day
Extrusion Mass Flow Rate (at 6 bar, 23°C)400g/min
Skin Formating Time (at 23°C, 50% r.h)35minutes
Properties

WACKER® GM - GLAZING AND METAL cures at room temperature under the action of atmospheric moisture to give a permanently flexible silicone rubber.

  • Non-sag
  • Ready gunnability at low (+ 5 °C) and high (+ 40 °C) temperatures
  • Flexible at low (-40 °C) and high temperatures (+120 °C)
  • Good weatherability
  • Low odor
  • Good tooling properties
  • Non-corrosive to metals
  • Suitable for alkaline substrates such as concrete, mortar, fibrous cement.

Regulatory & Compliance

Certifications & Compliance
Restrictions on Use
  • WACKER® GM - GLAZING AND METAL is not suitable for use on natural stones, such as marble, granite, quartzite, as it can cause staining.
  • WACKER® GM - GLAZING AND METAL must not be used for sealing of aquaria.
  • WACKER® GM - GLAZING AND METAL is not suitable for food contact applications.
  • WACKER® GM - GLAZING AND METAL is not suitable for mirror mounting. The curing time can be extended at lower temperature, lower humidity or by low volume of air exchange. Adhesion WACKER® GM - GLAZING AND METAL exhibits good primerless adhesion to many non-porous siliceous materials, e.g. glass, tiles, ceramics, enamel, glazed tiles and clinker varnished or painted wood substrates such as concrete mortar and fibrous cement. Users must carry out their own tests due to the great variety of substances. The adhesion can be improved in many cases by pretreatment of the substrates with a primer.
  • Weather and heat resistance WACKER® GM - GLAZING AND METAL has excellent weatherability and is virtually unaffected by UV, radiation, ozone, rain, snow, sunlight, and extremes of temperature. Its mechanical and physical properties do not change appreciably on aging or exposure to weather. Even after many years in service, seals remain fully functional.
  • Cured WACKER® GM - GLAZING AND METAL stays elastic at temperatures from as low as -40 °C to as high as +120 °C. It will even withstand brief exposure to lower and higher temperatures.

Packaging & Availability

Packaging Type
Regional Availability
  • Africa
  • Asia
  • Middle East
Packaging Information

WACKER® GM - GLAZING AND METAL is usually supplied in standard size cartridges that fit all standard caulking guns.