Wacker ELASTOSIL® E4 – RTV-1 Silicone Paste for FIPG Sealing & Glass Bonding

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Wacker

Wacker ELASTOSIL® E4 – RTV-1 Silicone Paste for FIPG Sealing & Glass Bonding

✔ Acetoxy-curing RTV-1 silicone
✔Low Shore A hardness
✔ Excellent adhesion without primer on many surfaces
✔ Good heat stability
✔ One component
✔ Immediately ready for use
✔ Also usable for FIPG/ CIPG Read more

€23,25 Incl. BTW

SKU: A11453

30-day return period

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93 grams

€23,25

Cartridge 310 ml.

€33,95

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93 grams
Cartridge 310 ml.

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✔ Acetoxy-curing RTV-1 silicone
✔Low Shore A hardness
✔ Excellent adhesion without primer on many surfaces
✔ Good heat stability
✔ One component
✔ Immediately ready for use
✔ Also usable for FIPG/ CIPG

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.

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)
	📥 EN SDS Elastosil e4

Signal Word	H‑code	Hazard Statement	P‑codes	P‑statements
Warning	H302		-	-
Danger	H314		-	-
Danger	H318	Causes serious eye damage	P305+P351+P338 P310	IF IN EYES; Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing Immediately call a POISON CENTER/doctor

More information about H and P statements can be found at UK HSE and ECHA.

Our story

Our story began with our father, the founder of Nedform BV. We— Roel, Rutger, and Rob Collaris —are his sons and wanted to bring his passion and knowledge to the online world. That's how SAM (Silicones and More) was born—a creative space for everyone.

Whether you're a beginner, an expert, or an enthusiastic DIYer looking for the right tools, materials, and some guidance, you've come to the right place. We've worked with silicones, resins, and casting materials ourselves for years. That's why we not only deliver quality but also genuine support—based on experience.

Small team with a great love for creating

Honest advice and reliable materials!

We help makers bring their ideas to life.

More about us

FAQs

What is the delivery time of my order?

Orders placed and paid for on business days will be shipped on the same day in most cases. Orders received on weekends will be processed on the next business day.

We always do our best to ship orders as quickly as possible, but actual shipping times may vary due to high volume, stock availability, or carrier circumstances.

Delivery time depends on the destination country and the carrier. Below is a general indication:

Netherlands: usually within 1 business day
Belgium & Germany: typically within 1–2 business days
Other countries: depends on the destination and the local carrier

Please note: these are guidelines, not guarantees. The final delivery time may differ due to factors beyond our control, such as sorting center delays, public holidays, or exceptionally high volume.

What is the return policy?

We offer a 30-day return policy as an added service. If you'd like to return an item or if there's something wrong with your order, please email us at info@siliconesandmore.com with your name and order number within 30 days of delivery. We'll help you quickly. The full terms and conditions can be found on our returns page.

How can I track my order?

Once your order has been processed and shipped, you'll receive a track and trace code by email, allowing you to easily track your package. Please note that it can sometimes take up to 24 hours after processing for the track and trace to be active.

I have a problem with my order, how can I reach you?

If you have any questions or run into any problems, please feel free to contact us via our contact page or email us at info@siliconesandmore.com . We'll be happy to help you quickly.

If you want an immediate answer, ask our chatbot. They have extensive knowledge of all our products and can often help you right away!

Can I also order for business purposes?

Yes, business orders are possible . Customers within the EU outside the Netherlands can order VAT-free with a valid EU VAT number (0 percent intra-Community supply).

Enter your VAT number on the shopping cart page , not at checkout.

Go to the shopping cart via the link below and enter your VAT number and email address, after which the VAT will be automatically removed.

https://siliconesandmore.com/cart

Please note that if you only enter your VAT number at checkout, it will not be processed correctly and VAT may still be charged.

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Wacker ELASTOSIL® E4 – RTV-1 Silicone Paste for FIPG Sealing & Glass Bonding

Wacker ELASTOSIL® E4 – RTV-1 Silicone Paste for FIPG Sealing & Glass Bonding

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