A silicone sealant is only as good as several factors that can affect its performance and suitability. The following are the main factors that affect the quality of silicone sealants:

Chemical stability: A good silicone sealant should have good chemical stability and be able to resist the erosion of chemicals, solvents, water and other environmental factors. They should not swell, break down or deteriorate.

High temperature performance: In some applications, silicone sealants need to be able to withstand high temperatures. Therefore, a high-quality silicone sealant should have excellent high temperature resistance and will not decompose or flow at high temperatures.

Electrical Insulation Properties: For some electronic and electrical applications, silicone sealants require good electrical insulation properties to prevent current leakage or electrical shorts.

Adhesion performance: A good silicone sealant should have excellent adhesion performance and be able to firmly adhere to a variety of surfaces, including metal, plastic, glass and ceramics.

Flexibility: A good quality silicone sealant is usually flexible enough to withstand mechanical stress, shock, and expansion/contraction without cracking or losing the seal.