C.R. LAURENCE AS789 CRL Locking Strip for Two-Piece Weatherstrips – 50″. CRL Locking Strips for Two-Piece Self-Sealing Weatherstrips are offered to complete the system when working with Two-Piece Weatherstrips. Dimensioned to give you the strongest and tightest fit when used with CRL”s Two-Piece Weatherstrips.. Part Numbers Variations: AS789 Powered by ExportYourStore.com