Actually in the process of actual production of door window, the input of sealing strip is very small, but its effect cannot be ignored however. Such as waterproof, sealing and energy saving, sound insulation, dustproof, anti-freezing, warmth, temperature resistance, aging resistance, these functions in daily life are not to be ignored.

Epdm sealing strip has the above characteristics, but his unique product characteristics are: light volume weight, large expansion strength, corrosion resistance, high and low temperature resistance, no deformation, no brittle crack, long service life. So how do we identify it?

First, can smell the smell of the nose, there will be a little bit of ethanol taste, but almost very small to smell.

Two, the sealing strip as tight as possible wrapped on the profile, placed under high temperature for a period of time (on the roof or in a sunny place). See whether the surface of the profile and the contact surface of the sealing strip is stained and discolored, whether the dust on the surface of the sealing strip is yellow (oil is very easy to absorb soil) oil seepage, whether dirty hands.

Three, some of the cheaper sealing filler will be a lot, so the surface will not be very bright, the very cheap appearance is not bright is not desirable.

Four, look at the specific gravity. Add a calcium-heavy seal, and you stretch it back and forth several times by hand. A small amount of white powder appears on the surface. Especially poor quality even casual pull on the broken.