Intek are the UK's leading independent distributors of high temperature, chemical resistant RTV silicone sealants and adhesives.

Contact us for friendly sales & technical advice from a family run company for over 25 years.


Threadlocking Adhesives

Food Grade Sealant

Engineering Adhesives

Electronics Assembly

Unit 20,

Atley Business Park,



NE23 1WP

Tel: 01670 734400

International: +44 1670 734400


Technical Support:

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Qsil 553 Is a 2-component, silicone elastomer system specially

designed for electronic potting applications.

It offers good protection against impact damage and can be employed in areas where low flammability is a prerequisite.

The cured product is a hard, medium to high modulus elastomer that can be repaired.

The component parts have relatively low viscosities and are readily

mixed in a simple 1:1 ratio

Industrial applications include:

• Potting & encapsulation delicate electronic assemblies

• PCB protection where thermal conductivity is required

• Low viscosity to run around complex parts

• Encapsulation when environmental protection is required

Uncured Properties

Cured Properties


Charcoal grey

Specific Gravity:



Low viscosity liquid (6000 mpas)

Hardness shore ‘A’:


Cure Time:

Approx 24 hours (Room Temperature) or heat cure

Dielectric Strength:

20 Kv/mm

Tack Free:

45-60 minutes

Temperature Range:

-55 to + 260 C

Shelf Life:

6 months in dry conditions @ 20 C

Mail: enquiry - AG 300

01670 734400