How to choose sealant

There are many kinds of sealants: silicone sealant, polyurethane sealant, polysulfide sealant, acrylic sealant, anaerobic sealant, epoxy sealant, butyl sealant, chloroprene sealant, PVC sealant, and asphalt sealant.

The purchase of sealant mainly depends on several properties:
1、 Breaking strength (tensile force / cross-sectional area)
2、 Bond strength (tensile force / bonding area, except for substrate failure)
3、 Elongation at break (length at break / original length)
4、 anti-aging ability
5、 Appearance (sub luminosity, particles, bubbles)
6、 Shape retention (no drawing, no sagging)
7、 Shelf life
8、 Curing time

There is no good or bad glass glue, performance corresponding price, suitable. Secondly, there is stability and sufficient quantity, which is the test of manufacturers. If the capacity of sealant is less than the marked capacity (Note: it is the capacity. This situation of sealant is very serious), such sealant should be eliminated first. If the amount is large, the production stability of sealant should be considered.