Centrecoat Armourcoat Multi-Use Primer

Centrecoat ArmourCoat Multi-Use Primer is a two-component virtually solvent free flexible polyurethane primer.

Best Uses

Centrecoat ArmourCoat Multi-Use Primer is suitable for application onto thoroughly prepared concrete, polymer modified sand and cement screeds, steel, brickwork, block work and timber.

• Flexible
• Low viscosity - penetrates the substrate
• Seals concrete pores - reduces the potential for out gassing and pin holing in resin floor finishes
• Improves the adhesion of toppings to the substrate
• Easy to mix and apply

Unlike many other primers, ArmourCoat Multi-Use Primer is flexible, which can compensate for movement in the substrate.

Application

The concrete substrate must be at least 28 days old, sound with a minimum compressive strength of 25 N/mm2 and a minimum pull off strength of 1.5 N/mm2. The substrate must be clean, dry with a moisture content less than 5% (75% RH) and free of all contaminants such as dirt, oil, grease, coatings and surface treatments, etc.

The substrate should be free from rising damp and ground water pressure and contain a functional damp proof membrane. Inadequate preparation will lead to loss of adhesion and failure. Grinding, vacuum-contained shotblasting or planing is recommended depending on the final finish to be applied. Percussive scabbling or acid etching is not recommended. Contact our technical team for further information.

Once mixed, the primer should be applied immediately in a thin continuous film. Work the primer into the surface using a stiff brush or roller, avoiding pooling. On porous surfaces, Centrecoat ArmourCoat Multi-Use Primer will be absorbed very quickly leaving dry patches. A second coat should be applied to these dry areas to ensure good adhesion and reduce the possibility of air release from the substrate causing bubbles or pin holing in the final topping.