Masterlite Pro A low weight concrete building block designed for thermal efficiency and manual handling considerations. Available in solid format with a standard strength of 3.6N/mm2 and 7.3N/mm2 10.5 N/mm2 blocks are available subject to order. Masterlite Pro blocks are available in standard and paintgrade finishes for various applications and total flexibility. For use internally and externally, both above and below dpc (7.3 & 10.4N/mm2 only) The product is suitable for use above and below dpc both internally (3.6 N/mm2) and externally (7.3 N/mm2 & 10.4 N/mm2) Units of 7.3 N/mm2 are suitable for use in beam & block floors. Masterlite Pro blocks are also suitable for use in Robust Detail wall types E-WM-2,4, 8, 11 & 14. Standard - Suitable for locations where the surface will not be seen i.e. plastered or rendered. Paintgrade - (7.3 N/mm2) Suitable for locations where a consistent close textured face is required, suitable for direct decoration (note only one face & one end guaranteed).