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Maxtech SI8709 Two Component Dielectric Insulation lTERMINAL JUNCTION BOX Liquid Silicone GeI

Product Description

SI8709 is two-component transparent self-healing silicone gel, is designed to protect electrical connections from the ingress of water as found in rooms with high humidity effects as well as in outdoor applications. Maxtech gel is a soft-elastic hardening, amber cold casting compound that is based on hydrocarbon resins.
when cured it will become elastomer with buffer and self-recovery property. Used to isolate moisture and another noxious pollutant from contacting the circuit board, also used as a dielectric of high voltage. The other usage is stress relief for protecting the circuit and interconnect devices from high temperature and mechanical stress.

∎Key Features

  1. 1:1 addition type, good adhesive strength and self-healing 

  2. High elongation, excellent flexibility for mechanical stress relieving

  3. Low oil penetration after cured, good anti-poisoning property

  4. Good dielectric in high temperature for high voltage protection 

  5. Excellent aging resistance and weatherability 

  6. Excellent waterproof, corrosion prevention, moisture-proof and chemical media resistance

∎Typical Applications

Used for encapsulation of various modules, semi-conductor, IGBT, automotive ECU module, IC chip, weighing sensor, waterproof connector.

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∎Technical Data Table

PROPERTY       STANDARD/UNITS                     VALUE of SI8709

     ----                           ----                                PART A                   PART B

Material                        ----                               Polysiloxane             Hydrogen polysiloxane

Color                     Visual inspection                 Colorless Liquid        Colorless Liquid

Viscosity                25°C, cps                                 800~1000                         800~1000

Density                  25°C, g/cm3                             0.99                                0.99

Mixture/mass ratio     ----                                               A:B=100:100

Viscosity of mixture   25°C, cps                                          800~1000

Operation time           25°C, min                                          50

Fixture Time              25°C, hour                                           5

Cure condition               ----                                          25°C/6hour, 80°C/30min

Cured appearance          ----                                               Transparent gel

Needle penetration      1/10 mm                                           90

Dielectric strength        KV/mm                                             18

Volume resistance        DC500V, ohm-cm                            1.0×1015

Loss factor                    1 MHz                                              <0.001

Dielectric constant        1 MHz                                                  2.8

Application temperature    °C                                                  -60~260


Note:All above data were tested under standardized condition or tested by further experiments.

How to use ?
  1. Mix Part A and Part B by 1:1 mass ratio, after evenly mixed, pouring directly into the components or modules as per requirements.

  2. Still the potted component to let out the bubbles. It can be cured by heat, about 30mins in 80°C. It needs about 6 hours cured under room temperature.

  1. Vacuum defoaming can improve the performance of the cured products.

  2. Seal the remaining products tightly after use.

  3. Low temperature will slow the curing speed; heat curing is recommended.

  4. It's hard for SI8709 to cure if contact with sulfur, amine or Sn


Packing Specification

  1. ●Part A—10 KG/Bucket

  2. ●Part B—10 KG/ Bucket

∎Transport &Storage

● When stored at or below 25°C in the original unopened containers, this product has a usable life of 12 months from the date of production. A sampling test is necessary for products that exceed shelf life before taking use.

It’s non-dangerous goods, can be transported as normal chemicals, CAUTION leakage during transport.

Silicone Gel

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