Two-part silicone adhesives
Range

Two-parts silicone adhesives

Two-part silicone adhesives start to cross-link (or cure) as soon as the two components are mixed. Their main attractive feature is their cure time which increases productivity and makes them compatible with bonding large thicknesses.

 

Two-part silicone adhesive is available in a number of formulations which cure in different ways to form a rubbery elastomer:

  • At ambient humidity; products known as RTV (Room Temperature Vulcanisation) adhesives
  • At high temperatures; these products are referred to as HTV (High Temperature Vulcanisation) adhesives

 

Two-part RTV silicone adhesives cross-link (or vulcanise) by polycondensation at room temperature (as a result of absorbing moisture from the ambient air).

 

At normal temperatures and humidity levels (25°C and 50% RH), silicone adhesive cures slowly (3 mm of depth/24 h) however, the cross-linking process can be accelerated by increasing the humidity level and/or the temperature.

 

Two-part HTV silicone adhesives cross-link by polyaddition when exposed to high temperature (approximately 150°C). Unlike RTV adhesives, these adhesives do not require moisture in the ambient air to cross-link, and for this reason they can be used in places where the availability of air is limited. This type of adhesive cures very quickly.

 

The various ranges of two-part silicone adhesives produced by ADDEV Materials are available in a wide range of viscosities to suit their intended application.

Properties
Bonding and sealing
Resistance to high temperatures (resistance to thermal dilatation)
High mechanical strength
Tear strength
Liquid tightness
Excellent resistance to UV
High flame resistance
Excellent resistance to chemical products
Good electrical insulation
High elasticity

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Typical applications

Aerospace
  • Bonding & sealing
  • General maintenance
  • Bonding cores (for the assembly of composite materials)
Electronics
  • Sealing and protecting electronic components
  • Sealing electronic devices (potting)
  • Electrical insulation

 

Manufacturing
  • Bonding silicone materials (e.g. sealing strips)
  • Sealing oven doors
  • Electrical insulation
  • Production of moulds
Construction
  • Bonding & sealing
  • Sealing light fittings
Automotive
  • Sealing headlights
Some of our references

Materials

BLUESTAR RTV 3428
MOMENTIVE™ RTV566
MOMENTIVE™ RTV627
DOW 93-500

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ADDEV Materials offers customised packaging and component quantities to meet your requirements.

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