Q: How to identify the quality of sealant?
A: There are many kinds of sealants:
Silicone sealants, polyurethane sealants, polysulfide sealants, acrylic sealants, anaerobic sealants, epoxy sealants, butyl sealants, neoprene sealants, PVC sealants, and asphalt sealants.
Sealant mainly looks at several properties:
I. Breaking strength (tensile force/cross-sectional area)
Two, bonding strength (open force/bonding area, except the destruction of the substrate)
3. Elongation at break (length at break/original length)
Four, anti-aging ability
5. Appearance (sub-luminosity, particles, bubbles)
Six, shape preservation (no wire drawing, the facade is not sagging)
Vii. Shelf life
Eight, curing time
There is no good or bad, the performance corresponds to the price, suitable for the best.
Secondly, there is stability and sufficient quantity, which is the test of manufacturers.
If the capacity of the sealant and the capacity of the label is less (note: is the capacity. The situation of sealant is very serious), such sealant is eliminated first, such enterprise management ideas have problems, the product is not much better. (Many also have problems, proving that the production process control of its products is not strict).
If the dosage is large, the production stability of sealant should be considered.