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Maxtech SI8295  RTV / Heat Cured Flame retardant Silicone Potting Adhesive 

Product Description

S8295A/B is a two-component addition cured silicone potting compound that can be cured at room temperature and heating. After curing, it will form an insulating soft and elastic rubber elastomer, which can protect circuit boards, electronic appliances or other potting Sealing and protecting objects, stable use in harsh environments, resistance to high temperature and moisture, and continuous protection of thermal conductivity and flame retardant insulation.

∎Key Features

  1. ●Two-component addition type silicone rubber

  2. ●Low curing shrinkage

  3. ●Excellent high-temperature electrical insulation and stability

  4. ●Good adhesion after heating and curing, the longer the heat curing, the better the adhesion

  5. ●Good waterproof and moisture resistance

  6. ● Good Flame retardant

∎Typical Applications

●The stator of the generator;

●Power vacuum circuit breaker;

●Magnetic induction coil; ceramic electrode;

●Automotive electronics, power control module;

●Photovoltaic junction box, photovoltaic inverter

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∎Technical Data Table

PROPERTY       STANDARD/UNITS                     VALUE of SI8295

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

Material                        ----                               Polysiloxane                      Hydrogen polysiloxane

Color                     Visual inspection               White viscous liquid       Red viscous liquid

Viscosity                25°C, cps                           7500                                         1000

Density                  25°C, g/cm3                          1.58                                        1.28

Mixture/mass ratio     ----                                               A:B=100:10

Viscosity of mixture   25°C, cps                                     4000

Density of mixture,g/cm3(25℃)                                      1.45

Operation time           25°C, min                                        50-60

Tack Free time           25°C, min                                        100-150

Cure condition               ----                                         100℃/60mins

Cured appearance          ----                                           Red elastomer

Hardness                      Shore00                                              45±5

Shear strength,MPa,Fe-Fe,MPa                                            1.5

Thermal conductivity,W/mK                                              0.45

Dielectric strength ,kV/mm, 25℃                                             ≥20

Volume resistance,DC 500V, Ω·CM                                      1.1×1015

Loss factor(1 MHz)                                                                     0.008

Dielectric constant(1 MHz)                                                       3.00

Application temperature    °C                                                  -60~260


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

How to use ?
  1. Mixing uniformity in the packing before using, as there’s part of filler sedimentation happens during storage.

  2. Mix Part A and Part B by 10:1 mass ratio, after evenly mixed, pouring directly into the components or modules as per requirements. It’s recommended to slowly pour along the walls of the implements, so as to reduce the bubbles happens.

  3. Still the potted component to let out the bubbles. Can be cured by heat, about 30 minutes in 120°C. If cured under room temperature, about 8 hours.

  4. The adhesive force cured at room temperature is weak; the adhesive force cured at 80°C is slightly better; in order to obtain a good bonding effect, it is recommended that the heating temperature should not be lower than 100°C, preferably above 120°C.

  5. Recommended curing conditions: 100℃ for 1 hour.

  6. Please test the bonding of the substrate before use.

  7. Vacuum defoaming can improve the performance of cured product.

  8. Seal the remaining products tightly after use.

  9. Low temperature will slow the curing speed, overheating will lead to curing speed too fast. Keep the constant temperature in workshop is recommended.

  10. It's hard for SI8295 to cure if contact with sulfur, amine, organotin and unsaturated hydrocarbon plasticizer. Common substances like rosin, natural rubber. For these should do test before application.


Packing Specification

  1. ●Part A: 5kg/drum

  2. ●Part B:0.5kg per bottle

∎Transport &Storage

When stored at or below -5~30°C in the original unopened containers, this product has a usable life of 12 months from the date of production. Sampling test is necessary for products which exceed shelf life before taking use. Beyond this date, Maxtech Chemical no longer guarantees that the products meet sales specifications.


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



High thermal conductivity potting compound is used to create a protective barrier around high-heat electrical appliances, components, and motors to prevent overheating. Thermal potting compounds are also used for potting electrical circuits and filling voids to protect fragile components from corrosive agents, water, moisture, vibration, shock, and chemicals.

High thermal conductivity potting compounds are used for a variety of high-temperature applications. Electronics potting and encapsulating compounds by Maxtech are formulated for consistent material performance, with excellent dielectric properties, electrical insulation resistance, thermal conductivity, thermal shock resistance, mechanical strength, adhesion, hardness, cure speed, and chemical resistance.

High thermal potting compounds for electrical equipment that may generate a lot of heat. For example, motors can overheat and cause damage to the rest of an electrical or mechanical device. Thermal potting compounds have a wide operating temperature range, which can prevent motors from overheating.

Electronic Sealant

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