Craystik Self-Adhesive Grip Nails are self-adhesive fasteners, which are widely used in Heating, Ventilation, Air Conditioning (HVAC) systems for fixing thermal insulation and internal acoustic liner onto the duct surface. Along with the duct insulation adhesive, Craystik Self-Adhesive Grip Nails hold the insulation firmly, not allowing any sagging and thereby preventing any condensation.