EPDM strips and silica gel strips are commonly used sealing materials in the door and window industry, and there are some differences in their properties and characteristics:
1. Material composition: EPDM rubber strips are mainly made of EPDM rubber, while silica gel strips are made of silicone materials. The chemical composition and structure of these two materials are different, which leads to the difference in their performance.
2. Sealing performance: EPDM strip has good elasticity and flexibility, and can closely fit the gap between the door and window frame and the glass, providing a good sealing effect. Silicone strips also have good sealing performance, but compared with EPDM strips, the sealing performance of silica gel strips is better, and it can maintain better elasticity and sealing performance in a wider temperature range.

3. Weather resistance: EPDM rubber strips and silica gel strips also have differences in weather resistance. In general, silicone strips have better weather resistance, can resist the erosion of environmental factors such as ultraviolet rays, high temperature, low temperature and humidity, and have a longer service life.

4. Chemical resistance: In terms of chemical resistance, silica gel strips have more advantages than EPDM strips. Silicone has good acid and alkali resistance and chemical stability, can resist the erosion of common chemical substances, and is suitable for the sealing requirements of doors and windows in some special environments.
5. Installation method: The installation methods of EPDM rubber strips and silica gel strips are also different. EPDM strips are usually adjusted by shearing, stretching or compressing to fit different sizes and shapes of window and door frames. Silicone strips are usually installed by sticking, using glue to fix them on the door and window frames.
In general, silicone strips have advantages over EPDM strips in terms of sealing performance, weather resistance and chemical resistance. However, in practical applications, the specific requirements and environmental conditions of doors and windows should also be considered in choosing which sealing material to use.