Henry 10.1 oz. 308 Driveway Elastomeric Crack Repair. Best repair for cracks up to 1/2 in. wide. Most durable crack repair that won't crack or shrink. Easy to use application and clean up. Allow to dry at least 24 hours before top coating surface. Do not use if rain or frost is likely within 24 hours. Cracks should be free of loose materials, grass or weeds. If crack is more than 1 in. deep, fill with sand to within 1 in.. For best results, crack should be damp, but free of standing water.