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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 a different coefficient 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

 

Applications

Product Colour Cure Mechanism Rheology Cure Time Applications
Elastosil N9111 B Black Alkoxy Non slump paste thixotropic Skin 25-30 mins Neutral cure non-corrosive adhesive sealant with excellent primerless adhesion; applications in electronics / automotive / appliances.
Elastosil N9111 W White Alkoxy Non slump paste Skin 25-30 mins Neutral cure non-corrosive adhesive sealant with excellent primerless adhesion; applications in electronics / automotive / appliances.
Elastosil N2034 Black Alkoxy Flowable Skin 20 mins General purpose adhesive sealant; suitable for FIP gaskets; UL94 V-0; neutral cure.
Elastosil N2189 Black Alkoxy Non slump Skin 15 mins General purpose adhesive sealant; suitable for FIP gaskets; UL94 V-0; neutral cure; oil and coolant resistant; hard.
Elastosil N2199 Transparent Alkoxy Non slump paste Skin 15 mins Excellent adhesion to plastics and metals; high elasticity makes it suitable for joining materials with different coefficients of thermal expansion; meets the physical requirements of MIL-A-46146, Group I, Type I.
Elastosil E4 Transparent Acetoxy Non slump Skin 15 mins General-purpose adhesive and sealant with low compression set.
Elastosil E10 Red Acetoxy Very low viscosity Skin 10-15 mins Excellent heat stability and good mechanical properties; sealing tubular heaters.
Elastosil E14 Red Red Acetoxy Non slump Skin 10-15 mins Broad adhesion profile and excellent heat stability. Applications include small appliances, FIP gaskets, and HVAC.
Elastosil E41 Transparent Acetoxy Self levelling Skin 15 mins Transparent sealant with excellent adhesion to cured silicone (contains toluene).
Elastosil E43 N Transparent Acetoxy Self levelling Skin 5-10 mins Food compliant; excellent primerless adhesion to many substrates.
Elastosil E50 N Transparent Acetoxy Flowable Skin 8-20 mins Food compliant; excellent primerless adhesion to many substrates; Meets MIL-A-46106.
Silpuran 4200 Translucent Condensation Non slump Skin 5-10 minutes Biocompatible, acetoxy-curing adhesive sealant which meets the requirements of ISO 10993 and USP Class VI.
Semicosil 987 Grey Addition Non slump 6h at 100°C
1h at 130°C
10 mins at 150°C
One part, low stress adhesive. Can be heat cured. Medium hardness. Applications include bonding, fixing and sealing components for measurement and control, sensor technology, electronics including automotive, as well as FIP gaskets.
Semicosil 989/1K Black Thermal Non slump thixotropic 6h at 100°C
10 min at 150°C
General purpose adhesive for electronics; FIP and CIP gasket applications; primerless adhesion to many substrates; cold storage.

Specifications

Product UL94 V-0 Tensile Strength Elongation % Temperature Range Hardness
Elastosil N9111 B Yes 2.2 N/mm2 500 -50 to 200°C Shore A 30
Elastosil N9111 W Yes 2.2 N/mm2 500 -50 to 200°C Shore A 30
Elastosil N2034 Yes 2.0 N/mm2 200 -50 to 180°C Shore A 35
Elastosil N2189 Yes 2.3 N/mm2 250 -50 to 180°C Shore A 45
Elastosil N2199 2.5 N/mm2 350 -50 to 150°C Shore A 30
Elastosil E4 2.0 N/mm2 750 up to 180°C Shore A 15
Elastosil E10 6.2 N/mm2 600 up to 250°C Shore A 25
Elastosil E14 Red 2.5 N/mm2 400 up to 200°C Shore A 32
Elastosil E41 6.0 N/mm2 350 up to 200°C Shore A 40
Elastosil E43 N 6.2 N/mm2 600 up to 180°C Shore A 30
Elastosil E50 N 1.5 N/mm2 150 up to 180°C Shore A 35
Silpuran 4200 5.5 N/mm2 300 up to 180°C Shore A 35
Semicosil 987 5.0 N/mm2 200 up to 180°C Shore A 50
Semicosil 989/1K 5.0 N/mm2 200 -50 to 180°C Shore A 35

Dispensing Systems

310ml Cartridge Fed Silicone Dispensing System
310ml Cartridge Fed Silicone Dispensing System

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:

Case Study F4300N.1 preeflow eco-PEN GJD Manufacturing 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.

Ordering Information

Our technical team are on hand to discuss your application requirements. Click here to get in touch.

Find out more information on how to purchase.

  • Last updated: May 2020
  • Version: 3.0

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.