S-3909 one-component RTV silicone rubber, strong sealant (paste)

S-3909 one-component RTV silicone rubber is translucent and semi-fluid. It has the ability to resist stretch, vibration and impact, excellent weather resistance, heat resistance, cold resistance, hydrophobicity, and can be used at -60~260℃. This product has good bonding properties, electrical properties, and high and low temperature resistance. It can resist mechanical vibration and high and low temperature shocks. It maintains excellent anti-penetration properties under various harsh conditions. After curing, it forms a strong bond with most materials. The bonding can fully meet the bonding requirements of electronic components.



Single-component RTV silicone rubber is mainly used for bonding and fixing PCB sensitive components, capacitors, transistors and other electronic components, electronics, instrumentation, chemical and light industry, chemical pipelines, mechanical equipment, refrigeration equipment, petroleum industry, automobile industry, shipbuilding industry , bonding, sealing, insulation, moisture-proof, shock-proof, coating protection and reinforcement in the fields of wires and cables, electric heating elements, household appliances, PTC heaters, lamps and other fields.


RTV silicone rubber electrical/mechanical properties (At TA=25℃)



standard test


Hardnessshore A


GB/T 531.1

35 ±5



GB/T 528


Tensile strength MPa


GB/T 528


Shear strengthMPa


GB/T 7124


Dielectric strengthkV/mm


GB/T 1695


Dielectric constant 1.0MHz


GB/T 1693


Volume resistivityΩ · cm


GB/T 1692

≥1.0×10 15


RTV silicone rubber limit parameters (At TA=25℃)



numerical value


Surface drying time


3 ~10


Curing time


twenty four




1.0 ±0.1

g/ cm³

Operating temperature


-60°C To +260°C

Storage temperature

 tT _

 10°C to +25°C 


RTV silicone rubber transportation requirements

During the transportation of RTV silicone rubber, there are some common requirements and precautions to ensure product safety and quality remain stable:

1. Packaging: RTV silicone rubber should be transported in appropriate packaging, usually in sealed containers or barrels. This can avoid contamination and damage to rubber caused by external factors.

2. Sealing and marking: Make sure the sealing of the packaging container is intact, and clearly mark the product name, specifications, batch number, production date and other information of RTV silica gel on the container.

3. Prevent temperature changes: RTV silicone rubber is relatively sensitive to temperature changes, and exposure to extreme temperatures should be avoided as much as possible. During transportation, measures can be taken, such as using insulated packaging or refrigerated vehicles, to ensure that the quality of the rubber is not affected by temperature.

4. Moisture-proof: RTV silicone rubber is relatively sensitive to moisture, so contact with moisture should be avoided as much as possible. During the transportation process, to prevent the rubber from being affected by rain or humidity, you can use moisture-proof bags or moisture-proof packaging.

5. Anti-vibration and collision: During transportation, try to avoid severe vibration and collision of RTV silicone rubber to prevent packaging damage and rubber deformation or leakage.

6. Compliance inspection: Ensure that the transportation of RTV silicone rubber complies with relevant laws and regulations, such as international and domestic dangerous goods transportation rules, packaging, labeling and declaration requirements, etc.

7. Transportation records and tracking: Keep relevant records of the transportation process, including shipping dates, transportation transfers, receipt dates, etc., in order to track the flow of products and solve potential problems.

When transporting RTV silicone rubber, it is recommended to cooperate with a professional logistics company and follow relevant transportation and safety regulations to ensure that the product reaches its destination safely and maintains stable quality and performance.


RTV silicone rubber properties

RTV silicone rubber, the full name is room temperature vulcanization (rotation) silicone rubber, is a special silicone rubber material with the following characteristics:

1. Room temperature curing: RTV silicone rubber is a room temperature curing rubber material that does not require high temperature or additives for vulcanization reaction. It vulcanizes into a solid state at room temperature through a chemical reaction.

2. Excellent heat resistance: RTV silicone rubber has excellent high temperature resistance, can maintain stable physical and chemical properties in high temperature environments, and is resistant to oxidation and aging.

3. Excellent electrical insulation properties: RTV silicone rubber has good electrical insulation properties and can provide good insulation protection in electrical applications. It has high volume resistivity and dielectric constant.

4. Excellent chemical resistance: RTV silicone rubber has good resistance to chemicals such as acids, alkalis, and solvents, and can maintain its stability and performance in harsh chemical environments.

5. Good elasticity and tensile properties: RTV silicone rubber has good elasticity and tensile properties and can maintain its shape and function despite expansion, contraction and deformation.

6. Weather resistance: RTV silicone rubber has good weather resistance and is not easily affected by environmental factors such as sunlight, ultraviolet rays, humidity and oxygen, and can maintain its performance and appearance for a long time.

7. Good processability: RTV silicone rubber can be processed through various processes such as molding, pouring, injection molding, etc., and is suitable for manufacturing needs of various shapes and sizes.

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