Wacker ELASTOSIL® E43 Black – Black RTV-1 Silicone for Sealing & Industry
Wacker ELASTOSIL® E43 Black – Black RTV-1 Silicone for Sealing & Industry
Temporarily sold out
Leave your email address and we will let you know as soon as this variant is back in stock.
Variant: Black - Cartridge 310 ml
You will only receive a message about this product, no newsletter.
In stock
Ordered and paid on a working day: usually ships the same day
Delivery to Netherlands: usually within 1 working day
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
Question about this product? Our material experts are happy to help you choose the right product. Contact us
Similar products
Need something slightly different? These alternatives are close to Wacker ELASTOSIL® E43 Black.
-
Most similar
Wacker ELASTOSIL® E43 Transparent
Shore A 30 · 250000 mPa·s
- Same hardness
- Similar price per kg
from €22,95 ≈ €114,14/kg
-
Cheaper per kg
Wacker ELASTOSIL® E10 RED
Shore A 25 · 9000 mPa·s
- 5 Shore A softer
- €33,20 per kg cheaper
- Thinner flowing
from €28,33 ≈ €80,94/kg
-
Slightly softer
Wacker ELASTOSIL® A07 Translucent
Shore A 20 · Pot life 5 min
- Out of stock – ask for lead time
- 10 Shore A softer
- €121,76 per kg more expensive
- Shorter pot life (5 min)
from €23,59 ≈ €235,90/kg
-
Slightly harder
Wacker ELASTOSIL® E41 Transparent
Shore A 40 · 100000 mPa·s
- 10 Shore A harder
- €13,26 per kg cheaper
- Thinner flowing
from €22,95 ≈ €100,88/kg
Premium Black RTV-1 Silicone for Professional Sealing and Bonding Applications
Wacker ELASTOSIL® E43 Black is a one-component, acetoxy-curing silicone rubber paste that cures at room temperature under the influence of atmospheric moisture. With a dynamic viscosity of 250,000 mPa·s, the product is moderately self-levelling and suitable for precise applications as an adhesive, sealant and FIPG (Formed-In-Place-Gasket). After full curing at 23°C and 50% relative humidity, it yields a Shore A 30 elastomer with a tensile strength of 6.5 N/mm² and an elongation of 500%. The recommended service temperature is -45°C to +220°C, with a short-term peak temperature of up to 250°C. ELASTOSIL® E43 Black adheres without primer to many substrates, including glass, metal, ceramics, plastics and powder coatings, and is ideally suited as an adhesive on cured silicone rubber and silicone-coated textiles.
Key Benefits
- Shore A 30 hardness: Flexible and elastic end product – absorbs vibrations and mechanical stresses in the joint without cracking.
- Tensile strength 6.5 N/mm² at 500% elongation: Excellent mechanical properties for an RTV-1 silicone – suitable for dynamically loaded joints in machine and equipment construction.
- Skin formation in 10 minutes at 23°C / 50% RH: Fast surface drying for precision applications – prevents contamination during curing.
- Service temperature -45°C to +220°C: Wide thermal range – stable under prolonged exposure to high temperatures in heating, cooling and electronics.
- Primerless adhesion to cured silicone rubber: Unique feature of the E43 series – ideal for repair, seam sealing and bonding of siliconised materials.
- Solvent-free and self-levelling: No shrinkage due to solvent evaporation – even filling of seams and joints without rework.
Typical Applications
- FIPG (Formed-In-Place-Gaskets) in machine and equipment construction – liquid-tight seals for flange connections and housings
- Bonding and sealing of cured silicone rubber and siliconised textiles – seam sealing, repair and bonding
- Electronics and e-mobility – potting, sealing of housings and connections in environments with thermal cycling
- Lighting fixtures and white goods – sealing of connections and feed-throughs
- Railway industry and small appliances – vibration-damping adhesive joints in dynamically loaded structures
- Heating & cooling systems – resistant to permanent exposure to heat and condensation
Processing instructions:
- Make sure the surface to be treated is clean, dry and free of grease. Remove dust and loose particles.
- Apply ELASTOSIL® E43 Black directly from the cartridge or tube onto the surface. The product is ready to use and requires no mixing.
- Smooth or position immediately after application – skin formation occurs after approx. 10 minutes at 23°C and 50% relative humidity.
- Curing rate is approx. 12 hours per mm of thickness at 23°C and 50% RH. Full curing of thick layers requires free access of humid air to the silicone surface.
- Elevated temperature has only a minimal effect on the curing rate. Heat treatment is only suitable for thin films (<0.5 mm) – with thicker layers, blistering may occur due to rapid release of acetic acid.
- Removal before full curing: use white spirit or a comparable non-polar solvent. Remove cured material mechanically, if necessary in combination with a silicone remover.
Technical Data
| Property | Value |
|---|---|
| Curing system | Acetoxy (acetic acid), 1-component, RTV-1 |
| Colour (uncured / cured) | Black / Black |
| Dynamic viscosity (25°C, 0.5 1/s) | 250,000 mPa·s |
| Density uncured (20°C) | 1.09 g/cm³ |
| Density cured | 1.10 g/cm³ |
| Skin formation time (23°C / 50% RH) | approx. 10 minutes |
| Curing rate (23°C / 50% RH) | approx. 12 hours per mm of thickness |
| Shore A hardness | 30 |
| Tensile strength | 6.5 N/mm² |
| Elongation at break | 500% |
| Service temperature | -45°C to +220°C (short-term peak 250°C) |
| Auto-ignition temperature | 450°C |
| RoHS compliant | Yes |
| Food-safe (food contact) | No – not compliant with BfR or FDA food safety regulations |
Manufactured by Wacker Chemie AG, world market leader in the development and production of silicones for industrial and technical applications.
Professional Support
Do you have questions about substrate compatibility, processing conditions or the suitability of ELASTOSIL® E43 Black for your specific application? Contact us for technical data sheets, processing guides or product advice.
Product Properties
- Hardness30Shore AHardness of the silicone material
- ColorBlackColor of the finished product
- TransparencyOpaqueDegree of transparency
- Viscosity250000mPa·sViscosity of the uncured silicone
- Density1.09g/cm³Density of the cured material
- Tensile strength6.5MPaMaximum tensile force before breaking
- Elongation at break500%Maximum stretch before breaking
- Pot life10minutesWorking time after mixing
- Cure time720minutesTime until full cure
Thermal Properties
- Max. temperature220°CMaximum service temperature
- Min. temperature-45°CMinimum service temperature
Electrical Properties
- Electrically insulatingYesPrevents electric current flow
Certification & Safety
- UV resistantYesResistant to UV radiation and discoloration
- Moisture resistantYesResistant to moisture and water absorption
Application
- Use caseBonding and sealing silicone rubber, FIPG, electronics, machine and appliance engineeringIntended use
- Silicone type["RTV-1"]Type of silicone or polymer
- Cure speedNormalHow quickly the material can be demoulded
- 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.