Definitions for "Plastic cement"
A generic term used to describe a utility asphalt roof cement intended for use on low slopes.
Asphalt based sealant. Also called bull, mastic, tar, asphalt cement.
A compound used to seal flashings and in some cases to seal down shingles as well as for other small waterproofing jobs. Where plastic cement is required for sealing down shingles, use a dab about the size of a quarter unless otherwise specified.