Epdm seal with weather resistance, heat resistance, aging resistance, there are many kinds of seals on the market, how to choose and buy the right seal? To understand the seal identification method:

One. Smell with the nose to see if there is any odor, the normal PVC material will have a little son alcohol smell, almost small smell.

Wrap the seal as tightly as possible around the profile and leave it at high temperature for a while (on the roof or in a sunny place). See the profile surface and seal surface whether there is a stain discoloration, seal surface dust is yellow (oil is easy to absorb soil) infiltration of oil, whether dirty hands.

3. Some relatively cheap seal filler will be a lot, so the surface will not be very bright, those are very cheap appearance is not bright not desirable.

Look at the specific gravity, how many meters per kilogram. There are a lot of manufacturers, in the use of filler, in order to pursue greater output, the use of talc powder, heavy calcium and other things as filler, greatly increased the proportion of seal products, (our users are generally bought by the kilogram, by the length of the use) this actually increased the cost. Add the heavy calcium seal and stretch it back and forth with your hand several times. A small amount of white powder will appear on the surface.