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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Home Heat resistant sealant for led lighting junction box


High temperature sealant XTS 320 is a one part, moisture curing, room-temperature vulcanizing (RTV), 100% silicone sealant that cures to a tough rubber gasket and is ideal for high temperature applications when a non corrosive sealant is needed.

XTS 320 is designed to maintain maximum performance in a continuous temperature environment of up to 320°C (600°F) and intermittent exposure up to 350°C (650°F).

The cured gasket will remain permanently flexible even after 7 day continuous exposure to maximum temperatures.

XTS 320 resists aging, weathering and thermal cycling without hardening, shrinking, or cracking and has a NATO stock code for use on military vehicles and equipment.


Industrial High Temp Form-in-Place gasket maker

Mechanical assemblies in high temperature environments

Replaces almost any cut gasket and can be used to coat pre-cut gaskets  

Water pump and compressor gaskets

Ductwork sealant and adhesive

Insulation and weatherproofing on electrical equipment

Air conditioner and humidifier gaskets

Fireplace and oven seals

Bonding and sealing on solar panels, junction boxes and electronic equipment

Uncured Properties

Cured Properties


Orange / Tan

Specific Gravity:




Hardness Shore A:


Cure Time:

24 hours per 3mm

Tensile Strength:

28 kgf/cm2 ( 2.8 Mpa )

Tack Free:

15 minutes

Temperature Range:

-55 to + 320 C ( 350 intermittent )

Shelf Life:

12 months in dry conditions @ 20C

Enquire Download Technical Data File Mail: enquiry - AG 300

01670 734400