Description: Clear Waterproofing Membrane is a two part membrane you are required to purchase CWM Part 1 to use this product. This amount is matched to CWM Part 1 4ltrs for a Gloss finish and CWM Part 1 10L for a Matte or Satin finish. For external use for internal use the Part 2 additive is higher and you may require more to match your Part 1 but is required at all time to be a minimum of 10%. Clear Waterproofing Membrane Part 2 - 500ml (CWMP2500)