1. Taste. The rubber strip will have a certain odor, especially pungent, normal rubber and plastic sealing strip will only have the taste of plastic, good quality is not to smell at all.
2. Appearance. The appearance of the sealing strip is very rough, feel is also very hard, no tension. On the other hand, it is glossy appearance, soft feel and tension.
3. Specific gravity. The proportion of the sealing strip is particularly heavy, because in the production of the filler with heavy calcium or talc and other filling raw materials, so that it will increase the proportion of the sealing strip, and a good sealing strip is directly used as a filling raw material of light calcium carbonate.

4, the door and window sealing strip is installed on the profile or directly wound onto the plastic profile to the high temperature place for airing, the second adhesive strip is directly through the high temperature, the contact surface of the profile will change color, the surface will be stained with dust, and yellow and oil leakage.

5, with the nose to smell what is the taste, three ethylene propylene rubber strip has the taste of rubber, although he is synthetic rubber but it is rubber after all, so it will have the taste of rubber, rubber and plastic is the taste of plastic, the industry said rubber and plastic is actually modified PVC, this is from the taste.

6, with the fire of the rubber strip, rubber and EPDM rubber strip the first difference is that the burning of rubber and plastic is black ash, and there will be some viscosity, pinch by hand will draw, and EPDM rubber strip burning is white ash, a pinch by hand became black surface.