The key in the door and window seals. Sealing effect, strip plays a key role. Steel doors and windows on the market with the seal material is generally modified PVC, which plays a key role is to join the plasticizer, the relatively stable phosphorus plasticizer dioctyl phthalate, dibutyl, but the market higher prices. So some manufacturers to replace injustice with some cheap stuff: waste oil, the rest of the oil refinery base, etc., to the user later planted a big risk. Special Note: Optional steel doors and windows seal should pay attention to the following aspects: 1, with the nose smell the smell is normal PVC material a little alcohol taste, very small, almost smell. 2, in the summer, when doors and windows sealed with the profile contact surface is stained color, yellow oil leakage. 3. Look proportion. The same amount of high-quality feel strip doors and windows sealed to light, on the contrary to be heavier. Regular manufacturers generally use a small proportion of calcium carbonate as a filler, some manufacturers are using talc, GCC, to increase the proportion of the product. Because when sales are denominated by weight. Hazard inferior steel doors and windows sealed: 1, environmental, smelly, polluting the air. 2, reduce tightness. Poor quality of the sealing strip containing plasticizers or use inferior substitutes, hard winter, easy to aging, shrinking. A gap between the glass and profiles, causing leaks, leaking dust. Many users are often found inside the rainy plastic window layering parts out of the red liquid is between the window glass and sealing strip steel liner after corrosion caused by water. Not only greatly reduce the aesthetic plastic window, but also greatly affect the life of the doors and windows. Doors and windows sealed, although the proportion of small, but the effect can not be discounted. Inferior seal doors and windows not only environmentally friendly, containing the smell, your body will cause harm, pollute the air. With the prices of various petrochemical products continues to rise, some irresponsible manufacturers began to unfair competition from raw material aspects (called shoddy, shoddy). The key lies in the actual door seals, seal or bad seal plays an important role. Market with the seal material is generally modified PVC in soft PVC key role in its inside is nothing more than adding plasticizers good or bad, there are currently more stable phosphorus plasticizer dioctyl fat, two small fat. But now the market price is high, some unscrupulous traders use some other cheap stuff instead (waste oil, the rest of the oil refinery base, etc.) to consumers is a big risk. Its products are the symptoms: 1. Permeability surface precipitation phenomenon occurs, those fundamental and PVC waste oil is not compatible soluble seal surface is prone to grease the surface of the profile is also infected with yellow marks. Do not even have a lot of environmental volatile substances, air pollution. 2. When the so-called plasticizer volatilization or exudation after the seal will lose its original softness, becomes hard, and soon aging of contraction, so that a large part of the closed doors appears gap, becomes airtight poorly (leaking, leaking dust) especially steel liner inside the plastic doors and windows will soon be corroded, many users are often found in the rainy season out of a lot of dirty red liquid inside from the window layering parts, steel liner that is leaking through the windows and doors has long been corrosion, doors life will be greatly reduced. In the production process, put the seal of the proportion of small, but its role has not be ignored. So do not choose to reduce the cost of those little fake and then a little pseudo-products, the identification method is simple. First, what is with the smell, smell, taste normal PVC material will be a little bit of alcohol son, almost little smell. Second, try to seal tightly wrapped around the sections, placed at a high temperature for some time (on the roof or in a sunny place). Look profiles and seal the surface of the contact surface is defaced discoloration occurs, whether the dust seal surface yellow (with oil can easily absorb soil) permeability, whether left the dirty hands. Third, some of the price is relatively cheap filler seal will be a lot, so the surface is not very bright, very cheap those undesirable look very bright. Fourth, look at the proportion of how much energy per kilogram of rice. There are a lot of unscrupulous traders, in terms of the use of fillers big tricks, some manufacturers in pursuit of higher yields, (save a little electricity) using talcum powder, do something like GCC fillers, greatly increasing the proportion of seal products This virtually actually increased costs outweigh the benefits. Join TSP seal, stretch your hand back and forth several times, a small amount of white powder on its surface will appear. Cheonan company developed the glass doors / automatic doors / revolving door sealing system products, is currently the only way to fully realize the special seal doors and windows sealed products. This seal all imported materials developed from a strong anti-aging, durable, after the installation of your door switch freely and still beautiful, energy saving. For door switch freely, there must be a gap around the door about 1 cm. Such a glass door jamb area is the sum of all the gaps of about 1000 cm2, very cold winter you open a window. These gaps will seriously affect the indoor warmth and air conditioning effect, causing a lot of energy loss, dust and insect invasion, outside noises, such as work and life will give you bring trouble. Cui doors and windows sealed system strong blocking outside rain, temperature, dust, etc., to meet your requirements, is the partner that best meets your economic interests.