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Description
Duralac Green is a chromate free jointing compound designed to inhibit electrolytic decomposition between dissimilar metals – often called galvanic corrosion. It is a single pack, air setting product. Used correctly, Duralac Green prevents anodic decomposition. Form Duralac Green is a free flowing paste based on a synthetic elastic resin and anti corrosive pigments, Duralac Green conforms to specification DTD 369B, which superseded DTD 369A.
Properties
Duralac Green has low solubility in water and will not erode with time; even when subjected to high pressure from considerable water flow. Duralac Green enjoys excellent adhesion properties to most substrates and because of its tough flexible composition, has very low water absorption. Duralac Green has a two year shelf life from the date of despatch when stored below 20°C. Once a container is opened, the remaining Duralac Green will form a skin.
Uses
Duralac Green is indispensable for the sealing of joints between dissimilar metals of all types; including magnesium and its alloys. Consideration should also be given to galvanic corrosion of the same metal where the electrolyte varies in concentration forming a concentration cell. Duralac Green has excellent protection properties for metals in contact with wood, synthetic resin composition, leather, rubber, fabrics etc. When components of a structure are of different materials, it is essential the ‘points or faces’ of contact be treated with Duralac Green to inhibit corrosion in the presence of an electrolyte where considerable differences in potential arise. Components of the same metal in contact with one another under different stresses will also benefit from the use of Duralac Green to inhibit corrosion.
