Sealant that can not be ignored in decoration|silicone sealant

When installing doors, windows or toilets at home, some owners and friends may find that the decorator will finally put a layer of glue on the joints between the doors, windows, or toilets and the walls or floor tiles. This is the "sealant" that small materials have a great effect on today. .
Sealant, as the name suggests, is a kind of sealing material. Its most special feature is its "sealing" performance. Although the sealant is inconspicuous, it plays an important role in the decoration. As an auxiliary material for high-frequency use in home improvement, there are many types of sealants, which are widely used in bonding, caulking, and joints between various types of glass doors and windows, cabinets, ceramic sanitary ware, interior and exterior walls and other substrates.
According to the main material composition, sealants can be divided into: polyurethane sealants, silicone sealants, polysulfide sealants, acrylic sealants, polyurethane sealants, modified silicone sealants, etc. Let's take a look at the characteristics and uses of various sealants.

1. Silicone sealant

In residential decoration, silicone sealant is the most common. Generally speaking, waterproof and mildew-proof silicone sealant should be used in places with water, such as shower rooms, bathtubs, toilets, kitchen sinks and other humid places to avoid mold. Neutral silicone sealant can be used in other places, such as the caulking of doors and windows. Due to its good UV resistance, excellent aging resistance, displacement resistance and elastic recovery ability, and excellent adhesion to common curtain wall materials, silicone sealant is the first choice for bonding and sealing materials in the curtain wall, door and window industry.

2. Polyurethane sealant

Polyurethane sealant can only be used for structural bonding and joint sealing of non-glass curtain walls. This sealant has the characteristics of high strength, good elasticity, stable bonding, tear resistance, wear resistance, and puncture resistance, but it is not resistant to ultraviolet aging. After long-term ultraviolet radiation, its surface will crack. Therefore, it is mostly used in non-sunlight glue joints (sealing of internal joints in buildings).

3. Polysulfide sealant

Polysulfide sealant has good air-tightness, but it is not resistant to ultraviolet aging, hardens after aging, and does not stick to glass. Therefore, it is mainly used for secondary sealing of insulating glass for doors, windows and exposed frame curtain walls. Use in large occasions or where exposed to sunlight. In the case of large temperature difference, it is recommended to use silicone structural adhesive for the secondary sealing of insulating glass.

4. Acrylic sealant

Acrylic sealant has general properties. The average elongation, displacement ability is not high, and the anti-aging performance is not as good as silicone rubber. Therefore, it is currently less used in the construction field. In many places where acrylic sealant can be used, people prefer to use silicone. Sealant. It is mainly used for sealing and mounting of window holes, window frames and window glass, sealing of deformation joints of concrete building roofs and walls (sealing of internal joints of buildings), and also used as anti-mold sealant (it does not grow mold or can inhibit mold) Growing sealant) and so on.

5. Modified silicone sealant

Modified silicone glue (MS glue, also known as silicone modified polyether sealant) has been developed in recent years and is widely used in home decoration because of its superior performance. Modified silicone adhesive has the advantages of silicone sealant and polyurethane sealant. It has super high resistance to deformation and displacement, good adhesion, paintability, environmental friendliness, low contamination, low viscosity and excellent workability Etc. Its aging resistance is not as good as silicone glue, but it is worse than other types of sealants, and its adhesion, environmental protection and mildew resistance are better than silicone glue. Modified silicone glue can not only be used to bond glass like glass glue, but also can be used to seal windows, sinks, toilets, etc., and can be used to install baseboards, towel racks, floors, etc.
There are many types of sealants, they look the same, and they have a lot of knowledge inside. If they are not selected properly, there will be water leakage, or yellow and moldy parts of the glue. A small sealant has great capabilities. Don't wait until one day you find that the corners and joints of your kitchen, bathroom and other places are yellowing and moldy before you realize the importance of sealant.