Silicone use common sense
Acetic acid type Fast curing, good transparency, but in the process of releasing acetic acid; It has a pungent odor and is corrosive to metal, coated glass and some inorganic materials. De alcohol type TC The curing shrinkage rate is small,
Acetic acid type
•Fast curing, good transparency, but in the process of releasing acetic acid;
•It has a pungent odor and is corrosive to metal, coated glass and some inorganic materials.
De alcohol type TC
•The curing shrinkage rate is small, the water immersion is small, and it has no corrosion to most substrates;
•The poor adhesion of fluorocarbon plastic profiles, and white marble;
•In the construction of high temperature, the reaction speed is too fast, resulting in the formation of alcohol molecules can not be volatile in a timely manner, and the formation of bubbles affect the quality of construction.
De - TW
•Good adhesion can be in the appropriate high temperature construction, no bubble;
•There are micro rot on copper and the mirror. And the shrinkage rate than alcohol type.
•Structural adhesives are not allowed to be used in structural assembly;
•It is not suitable to be used in the surface of building materials, such as grease, plasticizer and other solvents;
•Not for frost or wet surface, long buried underground or long-term immersion occasions;
•Should not be used in the paint surface, may seal failure caused by cracking or peeling paint;
•Not suitable for direct contact with food or easy to wear mechanical wear;
•It should not be used when the surface temperature of building materials is lower than 4 DEG C or higher than 40.
1、Acid cement should not be used for cement, stone, because the acid gel to produce acetic acid, will react with cement, stone and other basic materials on the surface, forming a chalky substance, and caused by shedding;
2、The coefficient of expansion of the base material is large, there is displacement or vibration, the glue is too thin, so it is easy to cause the surface wrinkling of the gel after curing;
3、Such as the use of neutral and acid glue may lead to neutral yellow rubber;
4、(1) high temperature sizing, high temperature curing; curing speed, speed is greater than the release of methanol methanol exuded from the colloid velocity, the methanol aggregation after gasification to produce bubbles; (2) sizing too thin, less than 6 mm; (3) foam rod (bar) damage caused by foam (hole type bubble a); foam moisture; foam strips material incompatibility, chemical reaction; (4) irregular sizing, repeatedly scraping. The above 4 can lead to blistering after sizing.
5、Do not pay attention to the construction of the edge of excessive extrusion, otherwise easy to cause the liner foam rod deformation, after the foam stick will gradually recover, resulting in the overall weight of the sealant;
6、During construction, it is necessary to extend the time of correction as far as possible within the allowable scope of construction, and to adjust the operation, and the scraper is used to fix the upper end of the rubber seam from the lower end of the joint;
7、Due to the market all kinds of different profiles, advising clients before using each batch of rubber products, self adhesion test simple, in recognition of product quality before it can be widely used, this is to ensure the engineering quality and safeguard their own interests.