In-depth evaluation of weather resistance of outdoor engineering sealants
In-depth evaluation of weather resistance of outdoor engineering sealants
5-year natural exposure experiment reveals:
High-quality silicone glue: 92% elongation retention, no powdering
Poor-quality silicone glue: surface crack depth > 0.5mm
Accelerated aging standard:
Passed 5000 hours of ASTM G154 UV cycle (light 60℃/condensation 40℃)
No peeling after 300 times of -30℃~80℃ thermal shock
The formula with added fumed silica can improve UV resistance by 40%.