How To Distinguish The Quality of Silicone Sealant?

Silicone sealant compared with other types of sealant, the biggest feature is that it has excellent ultraviolet aging resistance and climate aging resistance, and has become the first choice for home decoration and building curtain wall doors and Windows.

The quality and price of silicone sealant on the market are uneven and mixed. Go to the building materials market, there are silicone rubber products everywhere, the brand is also ever-changing, sometimes it will be dazzling, how to buy good quality silicone rubber products? There is no hurry! Xiaobian today will teach you a few tricks to distinguish the quality of silicone sealant.

1.Gloss

Different quality of silicone sealant after curing gloss will be different, high quality glue after curing luster, and inferior glue some a dozen out luster, and some after curing a month or two will lose luster. The higher the surface gloss, the more delicate and smooth the glue, the better the quality; Inferior glue vice versa.

2. Look at the particles

High quality silicone glue is a fully evenly stirred chemical synthetic material, fine and uniform texture, smooth and glossy after curing; There are some visible particles and debris of inferior silicone glue.

3. Check whether mineral oil is added

The main component of high quality silicone sealant is silicone, and the amount of other additive materials is very small. Pure silicone has good stability, it is very little affected by changes in external conditions during the storage period, but poor quality silicone sealant because its glue is not 100% silicone glue, additives such as mineral oil in silicone and the PE soft glue of the plastic bottle may have a chemical reaction, so that the plastic bottle expands and increases, and the air that remains seeps into the glue to create a gap. Glue will emit "pop, pop" bubble sound, so that the shelf life is shortened.

4. Test the bonding force

The silicone glue on the substrate, after curing, tear the silicone glue on the substrate by hand, if it can be easily torn up, indicating that the bond is not good enough; Otherwise, it is superior.

5. Compare elasticity and drawing

After curing silicone rubber strip, pull by hand, the elongation of good silicone rubber can reach two to three times the original. After releasing the hand, you can basically return to the original length. The longer the elasticity is maintained, the higher the quality of the glue. Look at the color when it reaches the limit. The less the color changes, the better the quality. On the contrary, the quality of the product is poor.

6.Anti-shrinkage

At present, the market is filled with a large number of poor quality silicone rubber products, they usually attract users at low prices, at the beginning of the use of no problems, but a few months to six months later, the problems of these products will gradually be exposed, there is a series of problems such as cracking, shrinkage, degumming, resulting in seal failure, housing leakage and other phenomena. Good quality silica gel has stable size, anti-shrinkage and good anti-displacement ability after curing.