USG Boral SHEETROCK® Base Compound is a vinyl-based, ready-mixed, high performance compound formulated for filling and smoothing monolithic interior concrete walls and ceilings. Designed to provide superior crack resistance and durability, it is easily applied with a steel trowel and can be sanded to achieve a fine, white surface. USG Boral SHEETROCK® Base Compound is a non-asbestos formula. It is a fit-for purpose compound for professional applicators that provides excellent coverage and is formulated to have minimal shrinkage. Complies with ASTM C475.
Application: Apply USG Boral SHEETROCK® Base Compound in accordance with manufacturer’s recommendations. In cold weather and during concrete wall and ceiling finishing, maintain temperatures at a minimum 13°C (55°F). Provide adequate ventilation to carry off excess moisture
Concrete surface shall be dry and free from dust, dry salts, oil, grease and other sources of contamination. Smooth surfaces must be treated with bonding agent
Apply the USG Boral SHEETROCK® Base Compound, as prepared above, with a steel trowel to a section of substrate in one direction and grade to give a flat surface. Allow to dry. Apply a final thin skim coat layer. Allow to completely dry prior to sanding
Touch up remaining uneven areas with the USG Boral SHEETROCK® Base Compound where required. Allow to fully dry prior to sanding
Thoroughly clean all tools and equipment after use
Mixing
Mixing: Always use clean tools
Do not mix with residues of previously used compounds
The inclusion of such materials will impair the performance of this product and will void the product warranty
USG Boral SHEETROCK® Base Compound may appear thick in pail. Before adding water, lightly mix and test its application; if required, add water to achieve desired consistency
Caution: Avoid over-thinning when adding water as this may cause cracking and excessive shrinkage
If liquid has separated from the compound, stir carefully to restore consistency
Caution: Do not over mix; over mixing can introduce air bubbles, which can create surface imperfections
Storage
Storage: USG Boral SHEETROCK® Base Compound should be stored under a cover in a dry environment and protected from temperature extremes; storage in an unsuitable environment can shorten the lifespan of this product
USG Boral SHEETROCK® Base Compound has a shelf life of 12 months from date of manufacture
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