Polysulfide sealant manufacturer @ polysulfide sealant manufacturer
Polysulfide sealant related knowledge introduced
Friend who uses or produces sealant must have some experience in cracking, mildewing and aging of sealant. How to choose different silicones for different places? How to use sizing to make beautiful cosmetic glue? What are the preparations? What issues should you pay attention to when gluing? Today Xiao Bian will take you to talk about sealants that you do not know about.
First, sealant selection techniques summary
There are many types of sealant on the market, and the base polymers of sealants can be classified into silicone type, polysulfide type, acrylic type, polyurethane type, styrene-butadiene rubber type, and butyl rubber type. So how do you choose the right sealant for such a wide variety of applications?
1. Compared with other sealing systems, silicone sealants are preferred
Silicone sealant has stable quality and long-lasting effect. It does not have high shrinkage like acrylic resin. Therefore, they are extremely cost-effective, especially when used in kitchens and bathrooms.
2. What are the conditions for each of the acidic and neutral systems?
Acidic Systems: Acidic silicone sealants have excellent adhesion to common substrate surfaces such as glass or ceramics in bathrooms or kitchens.
Neutral system: Neutral sealant must be used to seal substrates such as metal, plastic or concrete. Neutral silicone sealants are particularly suitable as corrosion-free seals for connecting seams and expansion joints.
3, silicone sealant can be used as adhesive?
Silicone sealants can be used for sealing and bonded on both sides to maintain elasticity. Silicone sealants cannot be used as adhesives, which are usually stiffer.
4. What is the compatibility of the silicone sealant with the surface of the coating or coating?
Most silicone sealants cannot be painted. If you want to color, choose hybrid sealant or acrylic sealant. Before applying the silicone sealant, it is recommended that the surface be coated first. 13785855258 Pay
Second, the correct use of sealant
1. How to deal with the substrate surface before sealing?
The area of ​​the substrate that is in contact with the sealant must be kept clean, dry, and free from dust, dirt, rust, grease, and other contaminants. Non-porous substrates must be cleaned with a clean, white, lint-free cotton cloth and solvent. Before the residual solvent evaporates, wipe it off with a clean, dry cloth as soon as possible. Before sizing, cut the nozzle of the cartridge first, then install the nozzle and cut the nozzle to the desired size. The sealant can be applied in spots or layers, requiring contact with moisture from the air to cure.
2. What should be taken care of when applying glue?
Make sure that the depth of the sealant is not greater than the width. If the gap between the two substrates is large, inserts need to be inserted to improve the performance of the sealant. The sealant is flattened with a suitable tool to make the surface more beautiful; at the same time, the sealant is pressed into the joint surface, which helps to eliminate air pockets or voids in the adhesive layer.
Note: Must be a straight line to play beauty glue, and the middle can not be stopped, because usually people who do not glue often, once pause and then hit, glue the interface will be unnatural, if not sure to play the beauty of plastic is a straight line, It must be affixed with textured plastic on both sides. After the surface of the cosmetic gel is dry, tear off the masking glue.
3, how to remove the cured sealant?
Use a sharp blade to scratch the cured sealant.
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