Longwall Mining Services, working in conjunction with Pleiger Plastics Co., recently introduced Plei-Tech Leg Pocket Fillers for filling open space cavities around the hydraulic legs of longwall roof supports. These cavity areas continuously get clogged with coal or debris, hampering operations, and have to be unplugged manually, creating unnecessary downtime. The foam fillers are custom designed to lock into any shield design acting as “stoppers” to prevent buildup in the three principal areas around the legs. Unlike other foam products, Plei-Tech fillers are made for abusive applications and are molded with a thick skin around the outside, according to the manufacturer. They will compress 70% of their height and will not take a compression set.