ARDEX Sikasil RTV WPM247 Primer 20 Litre Black SKU: 348249 MODEL: 11171 Error. try again later You've successfully joined the club $ 260 each Mitre 10 SAvailable at selected stores. Check your local store for details Variants Primer for ARDEX WPM3000X Damp-Proofing Membrane. Features and benefits Water Based. Prepare the substrate for ARDEX Bitumen systems. High coverage.