1.Structural sealant is used for bonding between materials (glass, profile, stone, etc.), which has structure and can transfer external and internal forces on the bonded materials.Weather-resistant sealant is used for sealing between components to achieve waterproof and weather seal purpose. 

2.The main difference is that structural sealant bears heavy duty, and weather-resistant sealant does not bear heavy duty.

Structural sealant is small deformation when the force increasing or decreasing.

4.The structural sealant has two components and one component, while the weather resistant sealant has only one component.

5.The elastic modulus of structural sealant is larger than that of weather resistant sealant, but the aging resistance of weather resistant adhesive is stronger than that of structural sealant.