A single-pack acidic wash which, when applied to new galvanized surfaces, produces a reaction which aids adhesion of subsequent paint coatings.
The surfaces will blacken if the wash is functioning correctly – contaminated areas will not show any change in colour, so indicating a further application is required.
Characteristics: An aqueous solution of phosphoric acid containing copper salts.
Advantages: Keys galvanized surfaces, therefore enhancing adhesion of primer. Good indicator of surface cleanliness. Easy to apply by brush and is economical.
Application: By brush. Do not apply by spray.
Thinning: Use as supplied by brush, do not thin.
Spreading Capacity: 18-20 m2/l when applied to smooth, non-porous surfaces.
Drying Times: 5-15 minutes.
Equipment Cleaner: Water.
Colour range: A light blue solution which, when applied, creates a semi-transparent blue/black effect.
Pack Sizes: 5-litre containers.
Availability: From Crown Depots in Nairobi, Mombasa and Kisumu or through Crown Stockists.
New, unpainted Galvanized surfaces: Degrease the surface using Crown White Spirit and allow to dry. Apply a wash coat of Crown Mordant Solution and leave for a minimum of one hour. Rinse thoroughly with clean water to remove excess acid and allow to dry.
Caution: This material is acidic and is harmful to the skin. Gloves and goggles should be worn during application. In case of contact with skin or clothing, the affected parts should immediately be washed with water.