Wacker G 795 – Primer for Silicone for Metal & Plastic
Wacker G 795 – Primer for Silicone for Metal & Plastic
Temporarily sold out
Leave your email address and we will let you know as soon as this variant is back in stock.
Variant: 50 Gr.
You will only receive a message about this product, no newsletter.
- 30-day returns
- Over 100,000 happy customers
- Pay later with Klarna
- Personal advice from material experts
Question about this product? Our material experts are happy to help you choose the right product. Contact us
Premium silicone-resin primer for professional adhesion and embedding applications
Wacker G 795 is a one-component primer (bonding agent) based on reactive siloxanes and silicone resins, dissolved in a mixture of isoalkanes. After the solvent has evaporated, the primer forms a rigid silicone-resin film under the influence of atmospheric humidity that adheres firmly to the substrate. The catalysed silicone rubber applied on top forms a tight bond with this resin film during vulcanisation. The primer is yellowish and clear, has an active substance content of 18% and a density of approximately 0.79 g/cm³. It is preferably used with addition-curing RTV-2 silicones from, among others, the Elastosil M and RT ranges, and also gives silicones with a high oil content (such as pad-printing silicones) excellent adhesion to aluminium or plywood.
Key Benefits
- ✓ Active substance 18% – thin, even resin film that strongly improves adhesion between substrate and silicone rubber.
- ✓ Reaction time from 1 hour – at room temperature and at least 40% humidity, or 10 minutes at 100°C on metallic substrates.
- ✓ Density 0.79 g/cm³ – low-viscosity solution (approx. 2 mPa·s) that is easy to apply by brush, dipping or spraying.
- ✓ Processing window up to 5 hours – apply silicone rubber within 5 hours of drying to avoid loss of adhesive strength.
- ✓ Broad substrate suitability – adheres to metals, wood and various plastics, even under fluctuating temperatures, damp and mechanical stress.
- ✓ Maximum adhesive strength after 4 days – usually sufficient adhesion after 24 hours for trouble-free demoulding.
Typical Applications
- → Improving adhesion of RTV-2 addition silicones on aluminium and other metals
- → Bonding silicone rubber to wood and plywood carrier plates
- → Pre-treatment of plastics such as acrylate, polyamide, polyester and PVC
- → Pad-printing silicones with high oil content on metal or wooden carriers
- → Embedding and bonding metal parts in silicone rubber
- → Applications with fluctuating temperatures, damp or tensile and shear stress
Processing Instructions
- Make the surface to be primed dry, dust-free and grease-free. First clean with a non-polar solvent (e.g. white spirit, boiling range 80–140°C) followed by a polar solvent, preferably acetone.
- Remove loose particles; lightly roughen very smooth surfaces by grinding.
- Apply the primer very thinly and free of air bubbles by brush, dipping or spraying. On smooth, non-absorbent surfaces (such as aluminium) as thinly as possible; on rough or absorbent surfaces (such as plywood) more liberally.
- Allow to react for at least 1 hour at room temperature and at least 40% relative humidity (monitor with a hygrometer), or 10 minutes at 100°C (metals only).
- Apply the catalysed silicone rubber immediately after drying, at the latest within 5 hours, otherwise adhesive strength decreases.
- Maximum adhesive strength is reached after 4 days; usually sufficient adhesion has developed after 24 hours. Heating to 100–150°C can further improve adhesion.
Wacker Chemie AG is the world market leader in the development and production of silicones for industrial and technical applications.
Get started
Not sure which primer best suits your substrate and silicone type? The right choice depends on the chemistry and surface properties and sometimes requires preliminary testing. Contact our team for personal advice.
Safety and compliance: always consult the safety data sheet (SDS) for complete hazard, handling and processing information before using this product.
Product Properties
- ColorYellowColor of the finished product
- TransparencyTransparentDegree of transparency
- Viscosity2mPa·sViscosity of the uncured silicone
- Density0.79g/cm³Density of the cured material
Physical Properties
- Flash point25°CMin. temperature at which the product ignites
- Ignition temperature240°CTemperature at which the product self-ignites
- Boiling point183°CBoiling point at atmospheric pressure
Application
- Use casePrimer / bonding agent for silicone rubber on metal, wood and plasticIntended use
- Silicone type["Auxiliary material"]Type of silicone or polymer
- Cure conditionRoom temperature or heatCondition under which the material cures
- Active substance18.0%Proportion of active substance
- SolventIsoalkanenSolvent used
- Application method["Penseel","Dompelen","Spuiten"]How the product is applied
- Reaction timeVanaf 1 uur bij kamertemperatuur (min. 40% luchtvochtigheid) of 10 minuten bij 100°C op metaalRequired reaction/flash-off time
Safety Information
Wacker G 795 is classified as hazardous. It is a flammable liquid and vapour (flash point 25 degrees Celsius), may be fatal if swallowed and enters the airways, and causes serious eye damage. Avoid contact with eyes and skin, do not breathe vapours or mist, and keep the product away from heat, sparks and open flames. When using, wear protective gloves, tight-fitting safety goggles and suitable protective clothing. Ensure good ventilation and local extraction; use a respirator with an ABEK filter if ventilation is insufficient. Wash hands thoroughly after use and do not eat, drink or smoke while working with this product. Always consult the full safety data sheet (SDS) before using this product.| Safety Pictograms | Safety Data Sheets (SDS) |
|---|---|
GHS hazard pictograms
  
Required protection (ISO 7010)
    |
| Signal Word | H‑code | Hazard Statement | P‑codes | P‑statements |
|---|---|---|---|---|
| Warning | H226 | Flammable liquid and vapour | P210 P233 P280 P303+P361+P353 P370+P378 |
|
| Danger | H304 | May be fatal if swallowed and enters airways | P301+P310 P331 P405 P501 |
|
| Danger | H318 | Causes serious eye damage | P280 P305+P351+P338 P310 |
|
Frequently asked questions
What is the delivery time for my order?
Orders placed and paid on working days are in most cases shipped the same day. Weekend orders are processed on the next working day.
Indicative delivery times: Netherlands usually within 1 working day, Belgium and Germany typically 1–2 working days, other countries depending on destination and carrier. These are guidelines, not guarantees: peak periods, public holidays or carrier delays can have an effect.
What is the return policy?
You have 30 days to return after receipt. Email info@siliconesandmore.com within 30 days of delivery with your name and order number. The full conditions are in our return policy.
How can I track my order?
As soon as your order has shipped, you'll receive a track & trace code by email. It can take up to 24 hours before the code is active.
I have a problem with my order – how do I reach you?
Contact us via our contact page or email info@siliconesandmore.com. We're happy to help you quickly.
Can I order as a business?
Yes. Apply for a business account; we review your application within 3 working days. After that you order while logged in and pay on invoice, with payment terms of 14 days after delivery.
EU businesses outside the Netherlands with a valid VAT number order with VAT reverse-charged (0%, intra-community supply). The VAT number is stored in your business account; it cannot be added to an order after it has been placed.