The waterproof ring made of silica gel as raw material is called silicone waterproof ring. The silicone waterproof ring is generally O-shaped, which is a classification of silicone products. It is a circular object made of silica gel. Generally, the silicone waterproof ring is used where waterproof and sealing are required.
1、 Raw materials. First of all, let's start with its raw materials:
① The raw materials of general silica gel can be divided into ordinary silica gel and meteorological silica gel according to their properties;
Ordinary silica gel: also known as precipitated silica gel, with a tensile ratio of 400%, is generally used to make silica gel miscellaneous parts, silica gel buttons, conductive silica gel, etc., and is generally used to make middle and low grade silica gel products.
Meteorological silica gel: it is also called pure silica gel, which is transparent. Its density is generally 1.1-1.2G/m2, and the tensile rate can reach 700%. Because of its excellent transparency and strong tensile ability, it is generally used to make silicone rubber tubes. Protective cover and other products, but the cost of this silicone is high.
② According to the physical properties of silica gel raw materials, it can be divided into liquid silica gel and solid silica gel;
Solid silica gel: generally made by molding process, used to make silicone kitchenware, silicone keys, silicone cover, etc;
Liquid silica gel: generally made by extrusion process, used to make silicone pacifier. Silicone tube, etc.
2、 Silicone waterproof ring is an excellent waterproof sealing material, because the silicone waterproof ring has good resistance to high and low temperature, sealing and insulation, and is environmentally friendly. Generally, the hardness of the silicone waterproof ring is 19-89 degrees.
3、 What are the characteristics of silicone waterproof ring?
① Non-toxic and harmless;
② This kind of material has strong plasticity;
③ The ambient temperature range used is - 59 ℃ to 199 ℃;
④ Its hardness is generally 29-69 degrees;
⑤ With atmospheric pressure aging resistance and weather resistance;
⑥ It is not oil-resistant, so it is not suitable for use in oil-resistant environment, but it is often used in climate-resistant environment, but the price is expensive.
4、 Silicone waterproof ring is often used in electronic equipment. O-ring, gasket, protective ring, waterproof sleeve, etc. can also be used for mechanical insulation and sealing.
For silicone rubber, please check the details:
https://www.siliconerubbers.net/product-general-grade-htv-silicone-rubber.html 
