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In life, we should have seen many different kinds of silicone products, but I don’t know if you noticed that not every one is a material. Silicone is divided into silicone and inorganic silicon, and silicone products can be divided into liquid. Silica gel and solid silica gel. As a professional silicone product manufacturer, we will introduce the difference between solid silicone and liquid silicone.

Liquid silicone

Liquid silicone is a relatively solid high-temperature vulcanized silicone rubber. It is a liquid glue with good fluidity, fast vulcanization, safer and more environmentally friendly, and can fully meet food grade requirements.

Solid silicone

Solid silica gel is a kind of cell-type polymer elastic material, which has the characteristics of high temperature resistance, cold resistance, solvent resistance, stagnation resistance, anti-sticking, electrical insulation and chemical industry, and has a wide application range.

Comparison of liquid silicone and solid silica gel


As the name implies, liquid silicone is in a liquid state and has fluidity.

Solid silica gel is solid and has no fluidity.


Liquid silicone is a food material with high transparency and high safety. It is not added with auxiliary materials such as vulcanizing agent during molding, and is sealed and molded.

Solid silica gel is a transparent and environmentally friendly material. It needs to be vulcanized for vulcanization molding time during molding, and it is molded by open mold.

Forming method

Liquid silicone is injection molded liquid silicone rubber (LSR): the full name is injection molding liquid silicone rubber, and the vulcanization equipment is injection molding machine.

The injection molding machine has a very simple process (no need for manual processes such as batching, rubber mixing, cutting, and arranging in the high-temperature glue process, only one worker can take the product), and the product has high precision (all manual procedures before molding) All are replaced by machines), high output (A/B glue mixed for a few seconds at a certain temperature), saving people, saving electricity, saving materials and many other advantages, can produce all high-temperature rubber production products.

The solid silicone rubber molding is a solid piece of material. After being kneaded by a mixer, the cutting machine cuts the appropriate size and thickness of the product and the mold, and then puts it into the mold and molds at a certain temperature under the pressure forming machine. When demolding is similar to plastic products, it is also necessary to clean the mold.

Liquid silicone products have high transparency, no odor, and the product has a glue injection port.

Solid silicone products have low transparency, vulcanizing agents or other fragrances that mask vulcanizing agents.

Liquid silicone is generally used in baby products and kitchen supplies as well as medical supplies to directly contact food and human body.

Solid silicone is generally used in daily necessities and industrial miscellaneous items, as well as in auto parts.