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Product Information

SYLGARD® 527 Silicone dielectric gel
FEATURES
• Two-part, 1:1 mixing ratio • Low viscosity • Room temperature cure or rapid heat cure • Addition cure system: no cure by-products • Self-healing gel • Permanent pressure sensitive adhesion to most materials without use of a primer • Stable and flexible from -50°C (-58°F) to +200°C (392°F) • Excellent dielectric propertiesPurity tested gel APPLICATIONS
• Designed to provide long term sealing against moisture and atmospheric contaminants especially where a purity tested product is needed. • Typical applications include: sealing and protection of delicate electronic circuits, hybrid devices and sealing of small appliances.

TYPICAL PROPERTIES
Specification writers: These values are not intended for use inpreparing specifications. Please contact your local Dow Corning sales representative prior to writing specifications on this product. CTM* ASTM* Property Unit Value Clear 0.97 450 Clear or red 0.97 450 450 1.7 7.0 45 9.6x10ª¤ 15 3.0x10¹¥

As supplied - Part A
0176 0022 0050 0176 0022 0050 D0792 D1084 Color Specific gravity at 23°C Viscosity at 23°C¹

mPa.s

As supplied - Part B
D0792 D1084 ColorSpecific gravity at 23°C Viscosity at 23°C¹ Viscosity at 23°C¹ Pot life at 23°C Gel time - plunger A at 135°C

mPa.s mPa.s hours minutes

Catalysed, mixed 1:1, by weight or volume
0050 D1084 0055 D1824 0674A 0155

Physical properties, cured 1 hour at 150°C
Penetration at 23°C mm x 10ª¹ Volume coefficient of thermal expansion 1/K

Electrical properties, cured 1 hour at 150°C
0114 0249D149 D257 Dielectric strength Volume resistivity kV/mm Ohm.cm

1. Brookfield LVF, spindle #3 at 60rpm * CTM: Corporate Test Method, copies of CTMs are available on request. ASTM: American Society for Testing and Materials.

HOW TO USE Substrate preparation
All surfaces should be cleaned and degreased with a suitable solvent prior to potting. Care should be taken to ensure that all solvent isremoved.

Mixing
SYLGARD 527 Silicone Dielectric Gel is supplied in lot matched kits consisting of Part A and Part B in separate containers. The two components should be thoroughly mixed using a weight or volume ratio of 1:1.

Vacuum de-airing is recommended. A residual pressure of 10-20mm mercury applied for 5-10 minutes will sufficiently de-air the material.

Pot life
When the twocomponents are thoroughly mixed in a 1:1 ratio, SYLGARD 527 Silicone Dielectric Gel will have a working time of about 1.7 hours at room temperature. The viscosity of the initial mix will double in about 2 hours at room temperature (pot life).

- Organo-tin compounds - Silicone rubber containing organo-tin catalysts - Sulphur, polysulphides, polysulphones and other sulphur containing materials -Amines, urethanes, amides and azides.

HEALTH AND ENVIRONMENTAL INFORMATION
To support customers in their product safety needs, Dow Corning has an extensive Product Stewardship organization and a team of Health, Environment and Regulatory Affairs specialists available in each area. For further information, please consult your local Dow Corning representative.

Repairability
When cured in place,SYLGARD 527 Silicone Dielectric Gel can be removed with relative ease, repairs or changes made and protected with additional gel. Since this gel develops a good adhesion to itself, the repaired region will become an integral part of the original material.

How to apply
Apply the encapsulant, being careful to avoid air entrapment. Vacuum encapsulation is recommended for complex geometries. Forinformation on appropriate dispensing equipment for your application, please contact Dow Corning.

WARRANTY INFORMATION - PLEASE READ CAREFULLY
The information contained herein is offered in good faith and is believed to be accurate. However, because conditions and methods of use of our products are beyond our control, this information should not be used in substitution for customer's tests to...