Definition of the term Cold Process Adhesive Mastic prepared with SBS modifiers to adhere laps, flashing and joints of built-up or low-slope roofing without hot-mopping or torching equipment. Related Posts Definition of the term Relative Heat Gain The amount of heat gain through a glass product taking… Definition of the term Rise In stairs, the vertical height of a step or flight… Definition of the term RPM Revolutions per Minute.