Silicone Sealant Detail | JCT Machinery

Recently, a group of foreign customers came to JCT's factory to learn how to make silicone sealant, and saw how high quality the JCT 5L double planetary mixer is! We made neutral silicone sealant and acidic silicone sealant.

Comparison of Silicone Sealants

1. Curing Mechanism

Neutral Silicone Sealant: Its curing process is triggered by a neutral catalyst. This type of sealant does not release any acidic substances during the curing process, so it has no sour smell. The reaction of neutral silicone sealant is usually promoted by moisture or humidity.

Acidic Silicone Sealant: Its curing process is caused by the catalytic reaction of an acidic catalyst. During the curing process, acidic silicone sealant releases a small amount of acetic acid, so it has a distinct sour smell.

2. Scope of Application

Neutral Silicone Sealant: Because it does not release acidic substances, it is suitable for a wider range of materials, including stone, aluminum alloy, mirror, plastic, wood, etc. This makes neutral silicone sealant more widely used in fields such as construction, automobiles, electronics and glass curtain walls.

Acidic Silicone Sealant: It is mainly used for bonding non-porous materials such as metal, glass and ceramics. Due to the release of acetic acid, acidic silicone sealant is not suitable for certain acid-sensitive materials, such as aluminum, copper, galvanized steel and other metals, especially in automobiles, construction and electronic products.

3. Curing Speed

Neutral Silicone Sealant: The curing speed is relatively slow, especially in low humidity environments, but its advantage is that it can be constructed in more demanding environments.

Acidic Silicone Sealant: Usually cures faster, suitable for fast construction and sealing work in a short time.

4. Weather Resistance and Durability

Neutral Silicone Sealant: Neutral silicone sealant usually has better weather resistance, aging resistance and UV resistance, and is particularly suitable for applications exposed outdoors for a long time.

Acidic Silicone Sealant: Acidic silicone sealant usually has good weather resistance, but its applicable temperature range and durability are slightly worse than neutral silicone sealant.

5. Environmental Adaptability

Neutral Silicone Sealant: Because it does not release harmful gases, it is suitable for use in applications with high corrosive requirements, especially for electronic equipment, glass decoration and other precision engineering materials.

Acidic Silicone Sealant: Because it releases acetic acid, it is not suitable for sealing  materials that require non-corrosive or acid-sensitive.