Cleaning:

Cracks are cleaned of all dirt, sand and debris using no less than a 185 cfm compressor at 110 psi. This will facilitate adhesion of rubberized material to the asphalt. All vegetation must be removed prior to application of material. It is recommended that a weed steril and be applied one week before removal to prevent vegetation re-growth.

Heat Lance:

All moisture must be removed from cracks to allow proper adhesion of rubberized material. A specialized hot air head lance is required for this purpose. The heat lance accompanied by a 185 cfm compressor produces an air stream velocity of 3,000 ft/sec. and an air temperature of 33,000 degrees fahrenheit.

Grinding:

Grinding provides for better adhesion of rubberized material to the asphalt crack's side wall. It also creates a reservoir for rubberized sealants. This reservoir of material will last longer and make for a better quality seal. Cracks 1/8" to 3/8" should be ground to a minimum of 1/2" wide by 1/2" deep.

Material Application:

RW rubberized sealants should be applied in prepared cracks at a temperature of approximately 380 degrees Fahrenheit.