RS Rubber Control Joint Catalog Masonry Products RS Rubber Control Joint Description Download MSDS Stainless Steel Finish Hot Dip Finish Galvanized FinishRS Series Extruded rubber material designed for masonry walls at control joints.Rubber material conforms to ASTM D-2000 2AA-805 with a durometer hardness of 80 (+ or - 5) when tested in conformance with ASTM D 2240.Length per piece is 4ft. Spec Sheet Rates Please contact us for current pricing and availability. Request Availability