Remove all loose materials or traces of foreign materials and ensure surface cleaned, free of dust and dirt. It is recommended to pre-wet the substrate surface prior to the application of POLYMiX Render. Plumb and level gap all surfaces to be spray rendered and all internal and external corners shall be pre-formed with PVC corner beads.
Mix thoroughly a bag of 40kg POLYMiX Render with 7.0 – 8.0 litres of clean water by using an electrical power mixer for 3 to 5 minutes to achieve a good trowellable consistency, prior to application. Re-mix the material before re-use if the material is left undisturbed for more than 30 minutes.
Apply POLYMiX Render homogeneous paste manually with a steel trowel. If application requires a few layers, the underlying layer must be partially cured before applying the subsequent layers. Alternatively, in mechanized application, spray the first coat to a thickness of not more than the recommended thickness and allow it to initial set. Immediately proceed to spray the second coat to slightly above the level strips while continuously checking and trimming off excess material to enable easier leveling of the surface. Allow this final coat to achieve partial set, then scratch trim and level the surface with aluminum float guided strictly by the level strips. Then simply work with steel trowel to achieve desired flatness and smoothness. POLYMiX Thin Plaster / Finishing is recommended to be applied for extra smooth finishing internally. For external surface, sponge the partially set texture in circular motion until the desired sanded texture is achieved.
