Rubber sound Isolation Clips. Used in Condominium, Apartment, Hospitality, residential, and commercial buildings to isolate noise in walls and ceilings. The RSIC (Rubber Sound Isolation Clip) provides the lowest cost highest performing noise control solutions available. This complete noise absorbing system achieves superior STC's and IIC's in floor/ceiling and wall systems making it ideal for both new construction and renovations. RSIC-1 is the first and only product classified by UL in both fire and sound.