Property

Test Method

Value

Uncured product

Appearance

White soft paste

Cure Type

Acetone

FDA

CFR (21] 177.2600

No

Max Cure Hrs @ 25 °C

8 hrs

Rheology

Self Level

Self Bonding

Yes

Tack Free Time mins

<2 mins

Viscosity A-Part mPas

Brookfield

350000 mPas

Cured product

After 7 days cure at 23°+/-2°C and 50+/-5% humidity

CTE Linear ppm/°C

198 ppm/°C

CTE Volumetric ppm/°C

475 ppm/°C

Colour

White

Duro Shore A

ASTM D 2240-95

65

Elongation %

ISO 37

94 %

Linear Shrinkage %

0.5 %

Max Working Temp +°C

AFS_1540B

220 °C

Min Working Temp - °C

-50 °C

SG

BS ISO 2781

2.24

Tensile MPa

ISO 37

2.8 MPa

Thermal Conductivity W/mK

1.55 W/mK

UL 94V-0

No

Storage

Max storage temperature °C

40 °C

Shelf life

9 mths

Electrical properties

Dielectric Constant @ 1kHz ASTM D-150

4.9

Dielectric Strength kV/mm

ASTM D-149

20 kV/mm

Dissipation Factor @ 1kHz

ASTM D-150

0.009

Volume Resistivity ohms cm ASTM D-257

1E+14 ohms cm

Adhesion testing

Lap Shear Aluminium kg/cm² ASTM D1002

6 kg/cm²

Lap Shear Copper kg/cm²

ASTM D1002

3 kg/cm²

Lap Shear Stainless Steel

304 kg/cm²

ASTM D1002

2.6 kg/cm²

AS1803

SILCOTHERM 1 Part RTV silicone adhesive sealant paste non corrosive

Introduction

This is a non-corrosive, neutral cure, 1-part, RTV (Room

Temperature Vulcanising) silicone adhesive sealant. It is one in a

range of Acetone cure products which are solvent free. It exhibits

excellent primerless adhesion to many substrates and cures

rapidly at room temperature when in contact with atmospheric

moisture to form a tough rubber. This product will not corrode

copper or its alloys and is suitable for use with electronic

components.

Key Features

Good thermal conductivity

Non-corrosive

Fast skinning

UL certified file number E334038

Use and Cure Information

This product is a ready for use 1 Part system. If supplied in

cartridges it can be applied using either manual or pneumatic

dispensing guns. It can also be applied from bulk containers using

conventional drum dispensing equipment.

All surfaces to which the sealant is to be applied should be clean,

dry and free from grease, dirt, and loose material. Priming of

surfaces is not normally required. If using as an adhesive, it

should be applied to one clean surface and the other clean

surface brought into contact with it within the tack free time stated

opposite. For optimum bond strength, the thickness of the sealant

joint should be a minimum of 1 mm.

The sealant will cure upon exposure to atmospheric moisture,

ideally between 20 to 30 ºC and 40% to 70% Relative Humidity.

Time taken for cure will depend on the thickness of the joint,

humidity and temperature. Joints should be left undisturbed for at

least 24 hours, but preferably longer to effect sufficient depth of

cure. Full cure requires 7 days.

“For pneumatic dispensing of 310 ml cartridges, the

recommended pressure is 2.25 to 3.45 bar (40 to 50 psi).

Dispensing pressure above the recommended limits may lead to

gas bypassing the piston, causing spluttering at the nozzle and

poor bead quality”

Health and Safety

Safety Data Sheets available on request.

Packaging

CHT Adhesives are available in a variety of packaging including

cartridges and bulk containers. Please contact our sales

department for more information.

Revision Date : 09/09/2019

Download Date : 25/11/2019

Technical Data Sheet

The information and recommendations in this publication are to the best of our knowledge reliable. However, nothing herein is to be construed as warranty or

representation. Users should make their own test to determine the applicability of such information or the suitability of any products for their own particular

purposes. Statements concerning the user of the products described herein are not to be construed as recommending the infringement of any patent and no liability

for infringement arising out of any such use is to be assumed. All values are typical and should not be accepted as a specification

CHT UK Bridgwater LTD, Registered Office: Showground Road. Bridgwater. Somerset.

TA6 6AJ. UK Registered No 01185365

Tel: +44 (0)1278 411400, Email: info.uk@cht.com, Web: www.acc-silicones.com