As a non-toxic, odorless and environmentally friendly material, silica gel is widely used for its various excellent properties. Various products made of silica gel continue to appear in our daily life.

What I will introduce to you today is - silicone foam products. Foamed silicone is also a common product category in silicone products.

Silicone foam, also known as addition-type silica gel, is based on silicone rubber and is produced by foaming to form a porous rubber structure with a cross-section similar to a honeycomb structure, which has good resilience and mechanical strength.

The density of silicone foam (0.3-0.7g/cm3), its long service life, and pressure resistance, acid and alkali resistance, aging resistance, ultraviolet resistance, high and low temperature resistance, environmental protection, non-toxic and tasteless, good flexibility.

Silica gel foam is a highly active adsorption material, insoluble in any solvent, stable in chemical properties, good in dielectric and insulating properties.

It can be used in a wide temperature range, from -60°C (or lower temperature) to +250°C (or higher temperature)


Silicone foam production process 

The principle of foamed silicone rubber is to add a foaming agent to the selected silicone rubber material, heat and vulcanize it under pressure to make the silicone rubber foam, and the rubber material expands to form a sponge-like cell structure.   

Silicone foaming needs to go through a series of production processes and processing techniques, and each link will affect the finished product of silicone foaming.   

1. Plasticizing  

When making foamed rubber products, the raw rubber is fully masticated, which will make the plasticity of the rubber better, and make it easier to produce products with uniform cells, low density, and low shrinkage.   

2. Parking  

After the rubber is mixed, it must be left for an appropriate time to allow the various additives to be fully dispersed in the rubber mix. The more uniformly the rubber additives are dispersed, the more stable the size of the product, the smoothness of the surface, and the uniformity of the bubbles. good.   

3. Temperature  

Rubber foaming is very sensitive to temperature. The foaming effect of the same rubber material is different at different temperatures, because the foaming system and the vulcanization system are different in sensitivity to temperature, the system changes, the matching degree is different, and the effect is also different. different.   

4. Molding  

The subsequent processing and molding methods of foam rubber products include extrusion molding, compression molding, flat molding, etc. According to the structure, specification, length, size, shape, hardness, and color of the required finished product, as well as the special requirements of the drawing, non-woven fabrics can be processed. Mark personalized customization.

The use of silicone foam

Silicone foam products have excellent heat resistance, cold resistance, high adsorption performance, high mechanical strength, and good thermal stability. In addition, foamed silicone is lightweight, damping and insulating.

Therefore, it is often used in occasions with low temperature resistance, heat resistance, UV resistance, ozone resistance and good electrical insulation properties. For example: in automobiles, aerospace, computers, mechanical equipment, electronics industry, kitchen utensils, home appliances and other equipment.

With the continuous development and updating of foaming technology, and because of its excellent characteristics, the product types of foamed silica gel are becoming more and more extensive, such as sealing strips, buffer pads, sealing rings, foam tubes, gaskets and other vibration isolation materials, protection equipment.


Silicone foam seals are extruded products and are common seals. They are mainly used in textile printing and dyeing equipment, drying equipment, special-shaped door seals, advanced ovens, high-end vehicle doors and windows, architectural glass, etc. Various specifications and shapes can be customized. glue used.

Silicone foam sealing ring is a molded product, which is one of the silicone sealing components to prevent external dust, air, water, etc. from entering the system. It is mainly used for waterproof sealing of display screens, electronic screens, LCD screens, street lamp signs and other products.


Silicone foam tube is an extruded product, because of uniform foaming, good elasticity, and good softness, it has high sealing and extruding properties and a good paste height! Can be used in supporting electronic appliances, furniture equipment, toys, hardware, medical equipment, sporting goods, audio, lighting, machinery, automobiles, industrial construction and other industries

Silicone foam board has strong sealing ability, dust-proof, moisture-proof, fire-proof, air-tight and light-shielding, and can effectively prevent tiny particles and rain. It can be used in vibration isolation in electronics and vehicles, heat transfer printing equipment, mechanical seals, medical equipment and other industries. It can be used for shock absorption, cushioning and pressing.
It can also be punched into various sealing gaskets and backing plates with strict requirements, and die-cut into sheets of any shape according to different requirements of customers

About silicone foam, please check the details:
https://www.siliconefoam.net/product-firm-cellular-silicone-iota-ht-820-.html