Tough Stuff™ is an asphalt emulsion based rubberized crack filler designed for filling cracks up to 1/2 inch in width in asphalt or concrete pavements. Tough Stuff™ is formulated as a heavy bodied liquid which allows it to be poured into cracks easily and uniformly. Tough Stuff™ also contains higher volume solids than many cold pour crack fillers. Higher volume solids result in less shrinkage after application. With its rubberized asphalt base, Tough Stuff™ has excellent bonding characteristics and remains flexible in all climatic conditions.