EPDM rubber seal strip is a very common type of seal strip nowadays. So how to stop discriminating EPDM rubber strip? 1. Taste. Inferior rubber strips will have a certain odor, especially pungent, while normal plastic rubber seal strips will only have a plastic taste, and high-quality ones will basically not have any taste. 2. Appearance. Inferior seal strips look very rough at first glance, feel hard, and have no tensile strength. On the other hand, good seal strips have a glossy appearance, a soft feel, and have tensile strength. 3. Specific gravity. Inferior seal strips have a particularly heavy specific gravity because the filler used in the consumption time adopts heavy calcium or talc and other filling materials, which will increase the specific gravity of the seal strip, while good seal strips will directly use light calcium carbonate as the filling material. 4. Install the door and window seal strip on the profile or directly wrap it around the plastic profile for drying in the central high temperature. Inferior rubber strips will change color after high temperature, contact with the profile, get dirty on the surface, and appear yellowing and oil seepage. 5. Smell it with your nose, what taste is it? EPDM rubber strip has a rubbery taste, although it is synthetic rubber, it is still rubber after all, so it will also have a rubbery taste, while plastic rubber has a plastic taste. The so-called plastic rubber in the industry is actually modified PVC, which is distinguished by taste. 6. Burn the rubber strip with fire, the main difference between plastic rubber strip and EPDM rubber strip is that the burned plastic rubber strip will turn into black ash and have some stickiness, and pulling it by hand will produce threads, while the burned EPDM rubber strip will turn into white ash and turn black when pinched. Hebei Xianghe (www.hebeixh.com)