Mastic 2415 may be applied by brush or by airless spray (25 : 1 ratio pump with follower plate)
Dusty or powdery surfaces should be brushed or wiped with a damp cloth. Any oil or grease on the surface should be removed with a cloth soaked in solvent. If very friable or porous surfaces are to be coated, it is recommended that a primer is applied. Two coats of Mastic 2415 are normally sufficient to give adequate protection. A drying time of 2 hours is required between coats.
Each dry coating should be 0.6 mm thick, equivalent to coverage of approx. 2m2 \ Ltr per coating. Coating has good resistance to mechanical damage, this property may be enhanced by the incorporation of a reinforcing membrane such as scrim or bandage/cloth between coatings of Mastic 2415.
The water resistance of 2415 is not achieved until the coating is dry. It is recommended, therefore, that the material is only applied outdoors during periods of settled dry weather.