Silicone Adhesive
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What is Silicone Adhesive (RTV-1 Silicone Adhesive)?
Our 1-component silicone adhesives / silicone glues are RTV-1 (room-temperature vulcanising) systems that cure through atmospheric moisture. They serve as a silicone adhesive sealant: one product that both bonds and seals.
Available in neutral-cure (alkoxy/oxime) and acetic-cure (acetoxy) versions, with variants from transparent "clear RTV" to black, and in flowable or thixotropic, paste-like consistencies.
Key Properties
- 1-component: straight from the tube/cartridge; no mixing required
- Bonding + sealing: one product for gluing and sealing
- Substrates: metal, glass, ceramics, many plastics* and painted parts
- Performance: temperature resistant, elastic, durable
*Check the datasheet and primer advice; some plastics (PE/PP/PTFE) require pretreatment.
📄 Technical Documentation
Download the complete product overview:
Wacker Elastosil RTV-1 Product Overview (PDF)Choosing a silicone adhesive: cure system, colour and processing
Neutral vs acetic
- ✓Neutral (alkoxy/oxime): non-corrosive, widely applicable
- ✓Acetic (acetoxy): excellent adhesion to glass/ceramics
Transparent or black
- →Transparent: "clear RTV" for inconspicuous joints
- →Black/white/grey: appearance, contrast or light-tight
Flowable vs paste
- →Flowable: self-levelling, capillary flow
- →Paste: thixotropic, non-slump on vertical surfaces
Quick selection: our silicone adhesives side by side
| Product | Cure | Consistency | Shore A | Service temp. | Key feature | Ideal for |
|---|---|---|---|---|---|---|
| ELASTOSIL E41 Transparent TF | Acetic | Self-levelling | 40 | -45 to 180 °C | Transparent, highest hardness, contains solvent | FIPG, lighting, joints on flat parts, silicone repair |
| ELASTOSIL E43 Transparent | Acetic | Moderately flowable paste | 30 | -45 to 180 °C | Solvent-free, high tear strength | Bonding silicone parts, O-rings, FIPG, coated textiles |
| ELASTOSIL E43 Black | Acetic | Moderately flowable paste | 30 | -45 to 180 °C | Black, solvent-free | Visible or light-tight joints, machine and appliance building |
| ELASTOSIL E43 N Transparent | Acetic | Non-slump to flowable | 30 | -50 to 180 °C | Does not inhibit addition-cure silicones, food contact under conditions | Bonding and repairing platinum silicone moulds, food contact |
| ELASTOSIL E4 | Acetic | Paste, non-slump | 15 | up to 180 °C | Very soft and stretchy (750 %) | Glass bonding, vertical joints, FIPG |
| ELASTOSIL E10 Red | Acetic | Flowable | 25 | -45 to 230 °C | Heat resistant, briefly up to 250 °C | Sealing and bonding at high temperatures |
| ELASTOSIL N2010 | Neutral (alkoxy) | Flowable | 25 | -45 to 180 °C | Non-corrosive, solvent-free | Electronics, PCBs, sensors, connectors |
| ELASTOSIL A07 Translucent | Amine | Low viscosity | 20 | -40 to 180 °C | Coating, contains solvent | Protective coating, HVAC, small appliances |
| Silicone Glue Set | 2-component | n/a | n/a | n/a | Fast, easy to use | Bonding cured silicone to other substrates |
Values according to the manufacturer, always check the technical data sheet on the product page. Do not use acetic or amine-cure adhesives on copper, brass or sensitive electronics, choose N2010 there.
WACKER ELASTOSIL E41 Transparent TF Silicone Adhesive
ELASTOSIL E41 (also searched for as elastosil e41 and wacker elastosil e41) is a self-levelling, acetic-cure (acetoxy) RTV-1 silicone adhesive that cures transparent. Its successor ELASTOSIL E41 Transparent TF replaces the current E41 Transparent, which we supply while stocks last.
Available in a 95 g tube and a 310 ml cartridge. Specifications, processing tips and the safety data sheet are on the product page.
- Self-levelling (65,000 mPa·s), ideal for joints, horizontal surfaces and FIPG
- Excellent adhesion to cured silicone and often primerless on glass, ceramics, metals and many plastics
- Temperature resistant from -45 °C to 180 °C, briefly up to 200 °C
- Note for electronics: acetic acid is released during cure, so for PCBs, copper and connectors choose a neutral-cure silicone adhesive such as ELASTOSIL N2010
Applications of silicone adhesive & silicone glue
Bonding
Glass/metal parts, housings, panels and components
Sealing
Joints, feed-throughs, enclosure covers, IP seals
Automotive/Mechanical Engineering
Vibration-resistant seals, formed-in-place gaskets
Electronics
Non-corrosive sealing (neutral) around PCBs and connectors
Similar searches & alternatives
Searching for these terms and looking for a suitable alternative from our range? We are happy to advise you.
Loctite Superflex RTV Silicone Adhesive Sealant
Frequently searched market term; comparable field of application. From our range you can choose, for example, ELASTOSIL E43 (moderately flowable) or ELASTOSIL E41 Transparent TF (self-levelling), depending on substrate and required consistency.
Permatex Black Silicone Adhesive Sealant 81158
Looking for a black version? We will recommend a black RTV-1 silicone adhesive from our range, such as ELASTOSIL E43 Black, based on your substrates and temperature class.
Permatex Clear Silicone Adhesive Sealant
For transparent bonded/sealed joints, choose a clear RTV silicone adhesive sealant (neutral recommended for electronics/metals).
Silicone Adhesive Sealant, generic name
The generic English product name for silicone adhesive / silicone glue. Use our selection guide to find the right cure system and the desired viscosity/colour.
Frequently Asked Questions (FAQ)
Is there a difference between silicone adhesive and silicone sealant?
In practice we use the umbrella term silicone adhesive sealant: one product that both bonds and seals. The difference lies mainly in viscosity (flowable vs paste) and in the cure system (neutral vs acetic).
When should I choose a neutral rather than an acetic silicone adhesive?
Neutral (alkoxy/oxime) is non-corrosive and widely applicable (glass, metals, electronics). Acetic (acetoxy) adheres very well to glass/ceramics, but can attack certain metals.
Does RTV-1 adhere to metal and glass without a primer?
Often it does, but the highest and most durable adhesion is achieved through thorough cleaning/degreasing and, where necessary, a suitable primer/adhesion promoter. Consult the datasheet.
Getting started
Compare neutral/acetic, transparent/black and flowable/paste. For transparent bonding and sealing, ELASTOSIL E41 Transparent TF (self-levelling) and E43 are a good start, for electronics and sensitive metals choose a neutral-cure silicone adhesive such as ELASTOSIL N2010. Contact us for the best match with your substrates and temperature class.