ResDev Pumaprime SF

ResDev Pumaprime SF is a two component epoxy primer with good penetrating properties for use on concrete and polymer modified cementitious screeds.

Best Uses

ResDev Pumaprime SF is designed to improve the adhesion of floor toppings to the substrate. Benefiting from low viscosity, this epoxy primer penetrates the substrate and seals concrete pores, reducing the potential for out gassing and pin holing in resin floor finishes. ResDev Pumaprime SF also improves the adhesion of toppings to the substrate. Easy to mix and apply.

Suitable for application to thoroughly prepared concrete, polymer modified sand and cement screeds.

Application

Surface Preparation
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 groundwater pressure and contain a functional damp proof membrane. Inadequate preparation will lead to loss of adhesion and failure. Grinding, vacuum-contained shot-blasting or planing is recommended depending on the final finish to be applied. Percussive scabbling or acid etching is not recommended.

Oil and Grease
For large areas of contamination, use hot compressed air treatment. Small, isolated contamination should be removed using an appropriate degreaser, rinsed thoroughly and allowed to completely dry. A coat of ResDev Pumaprime OT should then be applied.

Application

Add the hardener component to the resin component and mix using a low speed electric mixer (200 - 500 rpm) fitted with a mixing paddle designed to minimize air entrainment for 1 - 2 minutes until homogeneous. Care should be taken to ensure that any material adhering to the sides and bottom of the mixing vessel is thoroughly mixed in, otherwise uncured patches may result.

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 Pumaprime SF 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.