Silicone adhesives
Range

One-part silicone adhesives

One-part silicone adhesives are generally polysiloxanes, i.e. a silicon-oxygen chain to which organic groups are bonded such as methyl groups.

One-part silicone adhesive is available in a number of forms which cure in different ways, to form a rubbery elastomer:

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

 

RTV silicone adhesive is cross-linked (or vulcanised) 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%), silicone polymerises slowly (3 mm of depth/24 h) however, the cross-linking process can be accelerated by changing these parameters.

 

HTV silicon adhesive (also known as high-temperature silicone adhesive) cross-links by polyaddition after exposure 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.

 

We classify RTV silicone adhesives into three main families, based on the type of product released during cross-linking:

  • Acetic silicones;
  • Neutral alkoxy silicones;
  • Neutral oxime silicones.

 

One-part silicone adhesives are available in a wide range of viscosities to suit their intended application.

Properties
Bonding and sealing
High temperature resistant (Thermal expansion resistant)
High mechanical strength
Tear strength
Liquids tightness
Excellent resistance to UV
Flame resistant
Excellent resistance to chemical products
Good electrical insulation
High elasticity

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Typical applications

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
Aeronautics
  • Bonding & sealing
  • General maintenance
Construction
  • Bonding & sealing
  • Sealing light fittings
Automotive
  • Sealing headlights
Some of our references

Materials

BLUESTAR CAF 4
BLUESTAR CAF 730
BLUESTAR CAF 1
BLUESTAR CAF 33
Loctite® SI5399
DOW RTV730
DOW RTV732
MOMENTIVE™ RTV106
MOMENTIVE™ RTV108
MOMENTIVE™ RTV133
MOMENTIVE™ RTV157
MOMENTIVE™ RTV162

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

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