Sealants
Only high performance used in commercial building and construction - silicones, polyurethanes, polysulfides
High performance - 25% joint movement in compression or tension with good recovery (ᢈ%)
Medium performance - 10-25% movement
Low performance used in interior
- brittle
- large shrinkage on cure or significant creep
Insulating glass windows require sealants
- accommodate movement of glass & aluminum
- provide low water vapor transmission rate
- stable, flexible