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Silicones

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Industrial silicones are versatile materials, easy to process and apply. They are suited to a wide range of applications. They cure at room temperature. They harden to a tough, rubbery solid.

They have great resistance to weathering and chemicals. Most importantly, they have excellent sealing properties. Their typical temperature range is between -60° C and 315° C.

ConRo Electronics offers a wide choice of products from major manufacturers such as Henkel Loctite and Dowsil.

Conro Electronics is an authorized distributor for Henkel Loctite.

Key advantages of silicones

  • Watertight: They are 100% watertight. This makes them ideal sealants in many applications.
  • Flexible: They remain flexible after curing. Certain silicones retain this property even in low temperatures.
  • Good adhesion: They have strong adhesive properties. They are well-suited for sealing joints between dissimilar materials (e.g. glass and aluminium).
  • Heat resistance: They have good heat resistance. Specific sealants are available for applications that require exposure to high temperatures.
  • Chemical resistance: They are resistant to chemicals. Special silicones can be manufactured to resist specific substances.
  • Electric insulation: Silicone sealants are useful for the insulation of electric and electronic materials.

Types of silicones

There are two main types of silicone sealants: acetoxy and neutral. The difference is based on their curing process.

  1. Acetoxy: This type releases acetic acid while curing. This causes a strong, vinegar-like smell. Acetic acid can be damaging to sensitive substrates. However, acetoxy silicones are still common, due to their lower cost. They are often used in industrial applications.
  2. Neutral: They release non-corrosive substances while curing. This makes them ideal for electric applications. Neutral silicones are odourless. They are more expensive than acetic ones.

1-part and 2-part silicones

1-part ones cure with no additional support. The product will begin to harden at room temperature. These silicones are easier to use, as they require no mixing.

2-part ones cure with the help of a curing agent. They require accurate measuring and mixing. They allow for an even curing process. 2-part ones are often used in moulding applications.

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