Polyurethane vs. silicone sealant: Selection decision tree helps you accurately match the scene
Polyurethane vs. silicone sealant: Selection decision tree helps you accurately match the scene
Keywords: sealant comparison, curtain wall vs. road, coatability
The core difference and selection logic of the two types of sealants:
Indicators Polyurethane sealant Silicone sealant
Elastic modulus Low modulus (adapt to large displacement) High modulus (rigid support)
Coating ability Paintable, good aesthetics Not paintable, easy to accumulate dust
Weather resistance Excellent (-50℃~100℃) Excellent (but easy to crystallize)
Recommended scenarios Road joints, cold chain warehouses Curtain walls, high-temperature equipment
Case: Polyurethane is the first choice for cold storage door sealing to avoid silicone low-temperature crystallization failure