Specialized
Masonry Levelling Compound Levelling Compound
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Specialized
Masonry Levelling Compound Levelling Compound
About Specialized Masonry Levelling Compound Levelling Compound
Masonry Levelling Compound (MLC) is a preblended, cement-based render that can be easily applied as a single levelling\/flanking coating toconcrete blocks, bricks, and other masonry backgrounds to produce a high quality even and true surface.
Key Points
- Excellent adhesionFibre reinforced
- Excellent base coat for subsequent levelling and finishing
- Can be applied up to 50mm in one coat
- Very good adhesion to masonry/concrete substrate
- Good shrinkage control and strength
Product specification
Precautions and limitations
Ensure all surface preparation instruction are followed.
All freshly applied material must be weather protected for a minimum of 24 hours after application. Exposure of applied product to rain, snow, dew, or other inclement weather conditions, direct hard sunlight or sources of heat while it is curing may have a detrimental effect on the finish.
- DO NOT overwater, over mix, or remix aged render with additional water.
- DO NOT mix more plaster than you can use in 45 minutes.
- DO NOT use render that has been mixed for more than one hour.
- DO NOT apply at higher than 50mm application rates. Any areas that require greater than a 50mm application must be completed in several coats following correct drying and recoat times.
- DO NOT apply Masonry Levelling Compound to wooden surfaces.
- DO NOT apply Masonry Levelling Compound over wet, frozen or frost affected surfaces.
- DO NOT apply Masonry Levelling Compound where it will be subjected to permanent immersion or where ponding will occur.
- DO NOT reactivate Masonry Levelling Compound with water once it has begun to set.
- DO NOT wet the substrate prior to the application of this material.
- DO NOT apply Masonry Levelling Compound unless the substrate has been properly cleaned, primed and prepared.
Performance guide
- Weather: Excellent weather resistance when used as part of an approved Specialized Construction Products system.
- Heat Resistance: Up to 60° C
- Water: Resists rain and condensation when used as part of an approved Specialized Construction Products system.
- Solvent: Solvent resistant
- Abrasion: Resists abrasion when used as part of an approved Specialized Construction Products system
Surface preparation
Previously painted surface
The substrate to which the chosen product is to be applied must be installed in strict accordance with the manufacture&rsquo ; s specifications and recommended installation procedures. For concrete/masonry substrates the suppliers required curing time must be allowed after installation to ensure the joints in the substrate have completed cured, shrunk, and stabilized. All solid concrete substrates must be fully cured and dry. New concrete must be at least 21 days old prior to the application of any render product.
Surface imperfection such as blowholes, large cracks and spalling must be patched and levelled to the required tolerances and flatness with Specialized render materials before this product is applied. All nibs, protrusions and excess mortar on the surface of the bricks or irregularities in the slab must be ground off prior to rendering.
All surfaces must be clean and free of debris, dirt and dust, efflorescence, grease, oils, curing agents, cleaning solutions, mould and algae or any other contaminants that may affect adhesion. Deeply contaminated substrates must be abraded to provide a clean sound surface. All loose or damaged material must be removed by water blasting, captive shot blasting, or mechanical wire brushing and then washed down before rendering commences.
Painted or glossy surfaces such as power floated concrete must be specially primed, acid etched or mechanically abraded prior to the application of any render.
All cracks that may be the subject to ongoing movement must be correctly repaired and reinforced.
All very porous surfaces should be sealed with an appropriate paint sealer prior to the application of the plaster.
How to apply
Brush, Roller
Mixing: 7.5L of water per 20kg
Apply by trowel or plastering pump.
Product must be applied not less than 4mm thick and up to 50mm.
If pointing between bricks is in poor condition or if the dwelling is subject to excessive movement a layer of 160g fibreglass mesh with a minimum aperture of 8 x 8 mm can be embedded into the Masonry Levelling Compound. All stress point should be reinforced with butterflies of mesh.
Apply render only when the temperature is between 5°C and 30°C. Once applied the render should be floated or screed flat to achieve a level plane which is free of deviations. Once dry the surface can be sanded flat using a longboard or scraped with a broad-knife to remove any ridges or minor bumps.