WCMulticor150 Insulated Cavity Closer 150mm x 2.4m is a multi-width cavity closer to suit standard cavity widths between 100mm to 150mm. This cavity closer provides a thermal break to the cavity, as well as acting as an effective vertical DPC barrier at the jambs. The WCMulticor150 cavity closer can be easily cut down to suit various widths of cavity by using the groove guides. WCMulticor150 provides a cost-effective solution to cold bridging problems at window and door reveals. Cavity closers achieve the required thermal resistance (R Value) at the reveal of door and window openings when the frames are fixed to allow a 30mm overlap into the cavity.