Sealants
Butyls
- excellent adhesion
- stringy in application and difficult to finish
- shrinks on solvent evaporation
- not suitable for moving joints
- excellent peel stength, elongation (350%), and tensile stength
Chlorosulfonated Polyethylene (Hypalon)
- lack of resilience
- recovery only 20-30%
- excellent oil, water, and ozone resistance
- nonstaining, good color retention
- can be painted
- 20-year life expectancy