Polyrend Coarse can be used as a base filler for filling larger surface irregularities & blemishes of up to 6mm per coat in a single coat. This product can also be used as a skim coat over flush jointed blockwork prior to application of texture coatings.
Polyrend Coarse can be applied to any clean masonry surface, unlike sand and cement this product can be overcoated the next day with a selected range of paint and Texture coating systems.
Surface preparation is the responsibility of the Builder / Renovator / Main Contractor and the Applicator. The substrate must be clean, dry, sound and free of all powdery residue, from oils, release agents, bondbreakers or any other contaminants that may interfere with adhesion. Tie wires, nails and steel on the surface must be completely removed, all other metal objects must be corrosion stabilized.
There must be less than 15% moisture Wood Equivalent in the surface at the time of coating to ensure optimum coating performance. The general surface condition is made suitable to receive the texture coating.
In hot weather, the substrate may be tempered with water to reduce suction. Very absorbent or friable surfaces may require pre-priming with Tex-Bond.
After thoroughly mixing with the addition of 15% clean Portland cement, add a little water to achieve the required workability the material is applied by hawk and trowel using a stainless steel trowel. While the coating is still moist a semi-smooth finish is achieved using a plastic diamond float, polystyrene or a sponge may be used to even the surface.
Care should be taken not to overwork the surface area. Application of Polyrend Coarse should be carried out at temperatures above 7℃ and below 32℃, freshly applied material must be protected from frost and rain for a minimum of forty eight (48) hours.
It is recommended that application be carried out by a skilled applicator, which is totally conversant with texture products and systems. Application in extreme heat or windy conditions, especially on large areas in full sun, should be avoided. Always prefer to work in shaded areas. During inclement weather, application should be stopped in sufficient time to allow the product to cure adequately. A drop of only 2℃ in air temperature at 85% relative humidity, is enough to induce the dew point thereby terminating the drying process for acrylic products.
DRYING / CURING TIMES
Polyrend Coarse is Touch Dry in 60 Minutes (2mm DFT) at 25℃ and 50% relative humidity, however drying will take longer at lower temperatures or higher relative humidity and can be re-coated in 24 hours.
1 pail of Polyrend Coarse has a spreading rate of 0.5 sq. metres per litre approximately 7–8 m2 corresponds to 2,000 microns dry film thickness assuming no loss. Practical spreading rates will vary due to such factors as method and conditions of application.
Polyrend Coarse can be overcoated with JPS Coatings Texture, Tex-Guard decorative sealer, or any coating system.