Surface Preparation
Concrete and Brick
Concrete to be treated must be dry, at least four weeks old and free of any soft surface laitance, contaminants, and not subject to rising damp. All loose material should be removed. Very smooth bare concrete or concrete with soft surface laitance should be etched with
Watco Cemtetch and the area thoroughly hosed off and allowed to dry. Grease or oil should be removed with
Watco Bio D (or similar degreasant) and the area thoroughly hosed off and allowed to dry. Very smooth previously painted surface should preferably be abraded to improve adhesion.
Steel
Remove loose or flaking material, rust and any previous coatings by wire brushing or disc grinding to achieve a bright surface. Grease or oil should be removed with
Watco Bio D and the metal then washed with water and allowed to dry. Coating should be carried out immediately providing flash rusting has not occurred.
Mixing
Decant all of the contents of the smaller tin into the larger tin, taking care to scrape out any sediment. Mix the components together very thoroughly using a spatula or similar wide bladed tool (a piece of wooden batten is ideal). Continue mixing until an even colour and consistency are obtained. Do not mix more than one unit at a time. If a paint stirrer fitted to an electric drill is used, also use the spatula to blend in any unmixed material from the sides and bottom of the tin.
Important Once the contents of the pack have been mixed a chemical reaction takes place which creates heat, and the product should therefore be used immediately.
Application
Best results are obtained in warm conditions (minimum 15°C). On horizontal surfaces apply by medium pile type roller (not foam) in one coat. On vertical surfaces 2 thin coats are recommended.
