AEFLEX is an “L” pre-cut adhesive polyethylene band (6 mm thickness, 50+150 mm height) specially made to be laid directly in contact between the anti-impact sound noise material (resilient) and the vertical partition (wall) as a disjunction element, to avoid the horizontal and vertical acoustic transmission to compromise the anti-impact sound noise insulation previously applied. AEFLEX SR is an adhesive polyethylene band (6 mm thickness, 40 mm height) used as disjunction element between wall and coating during renovation.