About WACKER Silicone Adhesive Sealants
Cost-effectiveness and sustainability are key considerations when it comes to bonding and sealing. Bonding with silicone adhesive sealants has decisive advantages over traditional mechanical joining technologies in terms of handling, functionality, durability and cost-efficiency. Single part RTV (RTV-1) silicones are one-step, ready-to-use adhesives and sealants. They crosslink automatically when exposed to air humidity at room temperature. These silicone rubbers are either room-temperature-vulcanizing (RTV) or one-part heat-curing systems. Both systems are exceptional for their processing properties.
Another important criterion for selecting the best product is the flow property – we offer you RTV-1 silicones with a consistency ranging from free-flowing to non-sag pastes.
WACKER silicone adhesive sealants can be applied easily and economically either manually or with automated dispensing equipment. Compared to mechanical joining methods, adhesive sealants significantly reduce not only the quantity of parts (e.g. screws, rivets, etc.) but also the number of process steps. Hence, silicone adhesive sealants help to reduce process cycle time.
RTV-1 silicones find many applications in form-in-place (FIP) gaskets and cure-in-place (CIP) gaskets.
Features & Benefits
- Bonding efficiency: An adhesive sealant acts as a bonding agent and sealant at the same time. The need for additional mechanical safeguarding measures often becomes obsolete.
- High joint reliability: Thanks to the good electrical insulating properties of silicones, different metals can be bonded without the risk of galvanic corrosion.
- Joint stress relaxation: Thanks to their low Young’s modulus, silicone adhesive sealants effectively compensate thermomechanical loads resulting from substrates with differing coefficients of thermal expansion.
- Versatile applicability: Silicone adhesive sealants have a high ability to bond dissimilar materials, usually without the need for primers.
- Temperature resistance: Permanently elastic properties from -45°C to over approx +180°C; Specialised types remain elastic even at 250°C and briefly tolerate even higher temperature spikes
- Chemical resistance: Permanent resistance to aqueous solutions, dilute acids and bases as well as solvents
- Resistance to radiation: Can be exposed to electromagnetic radiation emitted by sources from microwaves to UV even at higher doses
- Vibration and mechanical strength: Processing tolerances for joint parts are effectively compensated and vibrations are effectively dampened thanks to its high elasticity
- Minimal moisture absorption: The hydrophobic, water-repellent surface of silicones offers excellent protection against moisture
|Product||Characteristics||Viscosity (mPas)||Colour||Hardness (Shore A)||UL94 V-0||Elongation %||Temperature Range|
|Elastosil N9111||Very popular neutral cure, non-corrosive adhesive/sealant, with excellent primerless adhesion. Shear-thinning, non slump paste. Medium hardness. Also suitable for CIPG and FIPG gasket applications. UL94 V-0. Electronic component staking, ruggedising, wire tacking, Automotive, Appliances. Compatible with all silicone potting compounds; suitable for use in dam and fill applications.||800,000||Black or White||30||Yes||500||-45 to 180°C|
|Elastosil N2034||Flowable, non-corrosive black silicone for technical applications including bonding, sealing, coating, potting and gasketing. Self-levelling with medium hardness when cured, and flame retardant.||25,000||Black||35||Yes||200||-50 to 180°C|
|Elastosil N2189||Non-corrosive, neutral cure, hard but flexible silicone. Mineral oil and coolant resistant, with good heat stability and flame retardancy. A particularly good choice in applications such as automotive gasketing. UL94 V-0.||Black||45||Yes||250||up to 180°C|
|Elastosil N2199||Highly flexible, translucent silicone which meets the criteria of MIL-SPEC 46146. Neutral cure and good adhesion to many substrates including plastics, glass, metals and ceramic. Cured product has outstanding resistance to weathering, ageing, moisture, and UV light.||Translucent||30||350||-45 to 180°C|
|Elastosil E4||Soft, non-slump transparent adhesive sealant with low hardness, useful for signage, CIP gasketing and sealing applications. Highly elastic with excellent recovery after compression.||Transparent||15||750||up to 180°C|
|Elastosil E10||Flowable sealant with excellent heat stability up to 250ºC, long-term elasticity under thermal stress, and good mechanical properties. Low hardness. Applications include sealing of heating elements.||8,000||Red||25||300||up to 250°C|
|Elastosil E14 Red||Non-sag sealant with a broad adhesion profile and excellent heat stability up to 250ºC. Medium hardness. Applications include small appliances, FIP gaskets, and HVAC.||1,000,000||Red||32||400||up to 250°C|
|Elastosil E41||Transparent sealant with excellent adhesion to cured silicone.||100,000||Transparent||40||350||up to 200°C|
|Elastosil E43 N||Food compliant, high viscosity, fast curing adhesive sealant which cures to a transparent, medium-hard elastomer. High elasticity, tensile strength and tear resistance. Adheres to cured silicone rubber. Temperature resistance up to 200ºC.||300,000||Transparent||30||600||-50 to 180°C|
|Elastosil E50 N||Food compliant, transparent silicone for coating and potting applications including textile coatings. Medium hardness, more rigid than E43N.||50,000||Transparent||35||150||up to 180°C|
|Silpuran 4200||Medical-grade, biocompatible acetoxy-curing adhesive sealant which meets the requirements of ISO 10993 and USP Class VI. Fast skin time; medium hardness.||300,000||Translucent||35||300|
|Semicosil 987||Rapid heat-curing black adhesive sealant for electronics applications, including CIP and FIP gaskets. High hardness.||350,000||Black||50||200||-50 to 180°C|
|Semicosil 989/1K||General purpose transparent adhesive for the electronics industry. FIPG and CIPG applications. Primerless adhesion to many substrates.||300,000||Transparent||55||200|
For additional specifications, view our selector guide.
We supply the equipment necessary to dispense silicones, including manual silicone dispensing guns and complete automated silicone dispensing systems. Get in touch with our team to discuss the best options for your production environment.
See how one of our customers improved their manufacturing process and quality in this silicone dispensing Case Study:
|Automated dispensing helps security manufacturer increase throughput and quality
GJD Manufacturing switched to an automated method of dispensing silicone for sealing a plastic lens to aluminium housing. By doing this, they improved the throughput and quality of their white-light and infrared LED illuminators for the security industry.
- Last updated: September 2020
- Version: 5.0
Semicosil® and Elastosil® are registered trademarks of Wacker Chemie AG. Statements, technical information and recommendations contained herein are based on tests we believe to be reliable but they are not to be construed in any manner as warrantees expressed or implied. The user shall determine the suitability of the product for his intended use and the user assumes all risk and liability whatsoever in connection therewith.