Liquid sealant is usually used for self-leveling waterproof caulking, structural sealing, plane flexible bonding, sealant has good sealing performance, and has good temperature resistance, pressure resistance, tight medium and other characteristics, the use of simple, often used in mechanical and electrical products static sealing between the joint surface, and joint surface more complex thread sealing, etc. Sealant is generally divided into two categories: liquid sealant and anaerobic sealant, and the role of the more commonly used liquid sealant has the following five effects: 1, surface effect: no matter how the solid gasket is pressed, it will not completely fill the uneven joint surface, there will always be a gap on the interface, and the liquid sealant can fill all the depression, showing a good sealing effect.
2, adhesion effect: liquid sealant is liquid, has a certain viscosity, has a certain adhesion to the metal joint surface, is conducive to sealing.
3, film effect: in the joint between the liquid sealant is threaded fastening, the formation of the same film with the gap, and the surface is very consistent. At the same time, the thinner the film, the greater the recovery ability, the more conducive to sealing.
4, flow and pressure resistance: the metal joint surface of the use of liquid sealant, the gap is generally below 0.1mm, and the liquid sealant is a very high viscosity liquid, it is difficult to flow, so as to maintain its good sealing.
5. Volume change and fluidity: the anti-leakage effect of solid gasket is the elastic deformation caused by the compression of cushion piece. The leakage prevention of liquid sealant is in compression and tensile volume deformation, it does not exist solid gasket compression deformation, so that there is no compression fatigue, elastic damage, stress relaxation and other phenomena, and it is always attached to the connection interface, so it can prevent interface leakage.