Views: 0 Author: Site Editor Publish Time: 2022-03-28 Origin: Site
1. whether the quality is good, first smell the smell
Since acid glue contains acetic acid, it will produce a sour taste during the volatilization process, but generally speaking, the better the quality of glue, the lighter the acidity; the worse the quality of glue, the stronger the acidity (because of the added acetic acid component), At the same time, the odor of good quality glue disappears quickly during the curing process; while the bad quality glue, the sour volatilization time is much longer.
2. Watching gloss is the key
Different quality glues have different gloss levels after they are cast. The color of high-quality glues has a strong gloss after curing, while some inferior glues are dull as soon as they are punched out, and some lose their luster after curing for one or two months.
3. Pay attention to the discovery of particles
The high-quality sealing glue is fine and uniform, and the surface of the adhesive strip is flat and smooth after curing.
Inferior sealants can see particles and debris, and the surface of the adhesive strip after curing is uneven and not smooth.
Fourth, glue to pay attention to whether there are air bubbles
High quality sealant contains 100% silicone without air bubbles when applied.
Inferior sealants contain various additives and have bubbles when glued.
The main component of high-quality sealant is silicone, and the amount of other additives is very small. Pure silicone has good stability, and it is minimally affected by changes in external conditions during the storage period, and there will be no "pop" and "pop" bubble sounds due to the air mixed in the bottle and the glue being dispensed during sizing. .
5. Test the hardness after curing
After local gluing, the user should first check the surface drying time of the sealant according to the instructions on the product packaging. If the time is too short or the overtime is too long, it means that the quality of the sealant has problems (of course, the influence of environmental conditions should also be considered. ), and then after the curing is completed (the curing time should also be specified by the manufacturer), try the hardness and elasticity of the glue by hand, too hard or too soft glue is not a good glue, you can also cut the section of the glue to test Whether the curing effect inside and outside the glue is consistent.
6, the difference in tensile force is very different
The tensile strength and peel strength (i.e. tack) of the cured silicone adhesive also vary depending on the quality of the silicone. The tensile force of high-quality glue is extremely strong, the stretching range is large, and the anti-peeling strength is high, and the opposite is true for inferior glue.