Elastic cement is an elastomeric compound that can be used as a seal at the intersection of the different elements of your roof system and it will keep the water out.
It is designed to be especially flexible so it will absorb the movement of your building, and it is also used as patching for repairs. It’s a heavy-bodied compound and can be applied by brush or trowel. It’s formulated to be tough, long-lasting, and flexible...