MASTIC ASPHALT BASES: • Check that mastic asphalt is suitably sound (without brittleness, softening. etc.) with adequate cohesive strength, with a natural float finish and laid on a firm rigid base. • Ensure that surface is sufficiently regular to suit bedding depths of adhesive. • Clean thoroughly to remove surface dirt using warm water and a suitable detergent. Remove all detergent residues with
clean water.
and if it is a smooth shiny finished asphalt then yes prime.....