Wacker ELASTOSIL® E4 – RTV-1 Silicone Paste for FIPG Sealing & Glass Bonding
Wacker ELASTOSIL® E4 – RTV-1 Silicone Paste for FIPG Sealing & Glass Bonding
In stock
Ordered and paid on a working day: usually ships the same day
Delivery to Netherlands: usually within 1 working day
- 30-day returns
- Over 100,000 happy customers
- Pay later with Klarna
- Personal advice from material experts
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Premium RTV-1 Silicone Paste for Professional FIPG and Industrial Sealing Applications
Wacker ELASTOSIL® E4 is a high-quality 1-component, acetoxy-curing (RTV-1) silicone paste with low Shore A hardness, specially developed for formed-in-place gaskets (FIPG), cast-in-place gaskets, and professional bonding on glass and technical substrates. This professional product combines excellent primerless adhesion to glass, metal, and ceramics with permanent heat resistance up to 180°C (peak 200°C) and immediate ready-to-use application without mixing. Please note: E4 is a paste and not self-leveling – for self-flowing applications, please see ELASTOSIL® E41.
Key Benefits
- Excellent adhesion to glass: Superior adhesion to glass without primer – ideal for glass enclosures, luminaires, and optical applications
- FIPG and CIPG suitable: Specially developed for formed-in-place and cast-in-place gaskets in automotive and industrial assembly
- Heat resistant up to 200°C: Permanent stability at 180°C, peak temperature 200°C – suitable for demanding thermal environments
- Low Shore A hardness: Soft, flexible seal that absorbs compression and vibrations for durable connections
- 1-component, ready to use: No mixing required – can be processed directly from tube or cartridge for efficient production
- Broad substrate compatibility: Adheres without primer to glass, metal, ceramics, and many plastics
Typical Applications
- FIPG (Formed-In-Place Gaskets) and CIPG (Cast-In-Place Gaskets) for automotive and industrial components
- Lighting (luminaires): sealing and bonding of glass and metal enclosures
- Electronics: sealing of components and enclosures in high-temperature environments
- Battery potting for e-bikes, drones, and electric vehicles
- Glass bonding in construction, automotive, and optical industries
- General industry: sealing of joints and seams where heat resistance is required
Processing Instructions:
- Clean, degrease, and allow the substrate to evaporate
- Apply E4 as a paste – the product is not self-leveling, so apply precisely
- Curing starts upon contact with atmospheric humidity; higher humidity accelerates the process
- Always perform a small test on the specific substrate first
Wacker Chemie is a global leader in silicone technologies for industrial sealing, automotive FIPG, and electronics, with over 100 years of expertise in RTV silicones.
Professional Support
Our technical specialists advise on substrate preparation, FIPG design, adhesion properties, and optimal results for your specific sealing or bonding application. Contact us for technical datasheets or the safety data sheet.
Product Properties
- Hardness15Shore AHardness of the silicone material
- ColorTransparentColor of the finished product
- TransparencyTransparentDegree of transparency
- Density1.01g/cm³Density of the cured material
- Tensile strength2.0MPaMaximum tensile force before breaking
- Tear strength7.3kN/mResistance against tearing
- Elongation at break750%Maximum stretch before breaking
Thermal Properties
- Max. temperature200°CMaximum service temperature
Application
- Use caseFIPG Sealing & Glass BondingIntended use
- Silicone type["RTV-1"]Type of silicone or polymer
- Cure conditionRoom temperature and atmospheric moistureCondition under which the material cures
Safety Information
The product is not classified as hazardous according to EU regulations, but contains <5% methyltriacetoxysilane, a substance that forms acetic acid upon contact with moisture. Therefore, avoid prolonged exposure to vapours and prevent contact with bases, alcohols, and water during storage.| Safety Pictograms | Safety Data Sheets (SDS) |
|---|---|
GHS hazard pictograms
 
Required protection (ISO 7010)
    |
| Signal Word | H‑code | Hazard Statement | P‑codes | P‑statements |
|---|---|---|---|---|
| Warning | H302 | Harmful if swallowed | P264 P270 P301+P310 |
|
| Danger | H314 | Causes severe skin burns and eye damage | P260 P264 P280 P303+P361+P353 P305+P351+P338 P310 |
|
| 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.