Wacker Primer AV® – Primer for Silicone Adhesion on Metal & Wood
Wacker Primer AV® – Primer for Silicone Adhesion on Metal & Wood
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Ordered and paid on a working day: usually ships the same day
Delivery to Netherlands: usually within 1 working day
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Premium Two-Component Primer for Professional Adhesion on Metal and Wood Applications
Wacker Primer AV is a two-component primer (mixing ratio 2:1 by weight) that promotes adhesion between silicone rubber and metal, aluminium or wood. The primer is colourless to light yellow, has a low solvent content and is specifically formulated for addition-cure (platinum-cure) RTV-2 silicones from, among others, the ELASTOSIL M and RT ranges. After mixing, the primer forms a rigid silicone resin film with which the catalysed silicone rubber forms a strong chemical bond during curing. Even silicone formulations with a high silicone fluid content, such as those used for printing pads, achieve excellent adhesion to aluminium or plywood carrier plates.
Key Benefits
- Mixing ratio 2:1 – components A and B are easily mixed by weight by shaking the closed mixing vessel.
- Pot life approximately 8 hours – ample working time; only mix the amount that can be processed within this period.
- Low solvent content – limited emission of volatile substances during processing.
- Reaction time from 15 minutes – the primer film reacts at a minimum of 40% relative humidity at ambient temperature.
- Excellent adhesion – also on silicone-fluid-modified rubbers and on smooth or porous substrates.
- Versatile – suitable for metal, aluminium, steel, lead, iron and wood.
Typical Applications
- Adhesion of addition-cure silicone rubber on aluminium carrier plates.
- Production of printing pads with silicone rubber on plywood or aluminium.
- Pre-treatment of metal parts embedded in silicone.
- Adhesion on wooden moulds and carrier structures.
- Industrial and technical applications requiring durable adhesion under stress.
Processing Instructions
- Clean the substrate so that it is dry and free from grease, oil and contaminants. First clean with a non-polar solvent such as mineral spirits (boiling range 80 to 140 degrees Celsius), then with a polar solvent, preferably acetone.
- Remove loose particles and roughen very smooth surfaces by grinding.
- Mix components A and B in a 2:1 ratio by weight by shaking the closed mixing vessel. Never seal the mixing vessel gas-tight, as hydrogen gas may be released.
- Only mix the amount that can be processed within the pot life of approximately 8 hours.
- Apply the primer thinly and bubble-free with a brush, by dipping or spraying. On smooth, non-absorbent surfaces as thinly as possible; on rough or porous surfaces apply generously.
- Allow the primer film to react for at least 15 minutes at a relative humidity of at least 40% (check with a hygrometer).
- Apply the catalysed silicone rubber preferably directly after drying, but at the latest within 24 hours, as otherwise the adhesive strength may decrease.
Safety Information
Wacker Primer AV (component A) is highly flammable with a flash point of 2 degrees Celsius. Keep the product away from heat, sparks and open flame and work only in a well-ventilated area. Hydrogen gas may be released when mixing A and B; therefore never seal the mixing vessel gas-tight. Wear protective gloves, tight-fitting safety goggles and suitable protective clothing. Consult the full safety data sheet before use.
About the manufacturer
Wacker Chemie AG is the world market leader in the development and production of silicones for industrial and technical applications.
Professional Support
Not sure which primer and adhesion method suit your substrate and silicone type? The choice depends on the chemistry and surface properties of the substrate and sometimes requires a preliminary test. Contact us for tailored advice.
Product Properties
- Mix ratio2:1Mixing ratio A : B
- Pot life480minutesWorking time after mixing
Physical Properties
- Flash point2°CMin. temperature at which the product ignites
Component Properties
- Color AYellowish clearColor of component A
- Color BColourless clearColor of component B
- Viscosity A5mPa·sViscosity of component A
- Viscosity B100mPa·sViscosity of component B
- Density A0.99g/cm³Density of component A
- Density B0.96g/cm³Density of component B
Application
- Use caseAdhesion primer for addition-cure RTV-2 silicones on metal, aluminium and woodIntended use
- Silicone type["Auxiliary material"]Type of silicone or polymer
- Cure conditionRoom temperatureCondition under which the material cures
- SolventLaag oplosmiddelgehalteSolvent used
- Dosage ratio2:1 (A:B op gewicht)Recommended dosage ratio
- Reaction timeMinimaal 15 minuten afluchten bij kamertemperatuur en minimaal 40% relatieve luchtvochtigheidRequired reaction/flash-off time
Safety Information
Wacker Primer AV (component A) is classified as a highly flammable liquid and vapour (H225) with a flash point of 2 degrees Celsius. It may be fatal if swallowed and enters the airways (H304), causes skin irritation (H315) and serious eye damage (H318), may cause drowsiness or dizziness (H336) and is toxic to aquatic life with long-lasting effects (H411). Hydrogen gas may be released on contact with moisture or when mixing A and B; therefore never seal the mixing vessel gas-tight. When using, wear protective gloves, tight-fitting safety goggles and suitable protective clothing. Work only in a well-ventilated area or with local exhaust and keep the product away from heat, sparks and open flame. Do not smoke during use. Consult the full safety data sheet of component A and component B before use.| Safety Pictograms | Safety Data Sheets (SDS) |
|---|---|
GHS hazard pictograms
    
Required protection (ISO 7010)
    |
| Signal Word | H‑code | Hazard Statement | P‑codes | P‑statements |
|---|---|---|---|---|
| Danger | H225 | Highly flammable liquid and vapour | P210 P233 P240 P241 P280 P303+P361+P353 P370+P378 |
|
| Danger | H304 | May be fatal if swallowed and enters airways | P301+P310 P331 P405 P501 |
|
| Warning | H315 | Causes skin irritation | P264 P280 P302+P352 P333+P313 |
|
| Danger | H318 | Causes serious eye damage | P280 P305+P351+P338 P310 |
|
| Warning | H336 | May cause drowsiness or dizziness | P261 P271 P312 |
|
| Warning | H411 | Toxic to aquatic life with long lasting effects | P273 P391 P501 |
|
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.