Case 2

Introduction

Incompatibility of Sealant

Type of Building: Commercial Building

This is a common adhesion problem between the sealant and its substrate.

Sealant is a common material used in a facility to seal an opening or joint on walls and floors from the passage of fluid, dust, air, sound, heat, etc. The common types of sealant used in construction are two-part polysulphide, polyurethane, and silicone. Their durability of high-performance sealants can be high if properly selected, installed and maintained:

Common sealant failures on facade include problems associated with:

-adhesion
-cohesion
-hardening
-weathering
-crazing
-softening
-decomposition
-chalking
-cracking
-loss of elasticity

See also: Material Manual > Facade > Cladding > Jointing Materials > Seala