Masterdenz A range of high strength concrete building blocks, robust, load bearing units for use in either internal or external walls in a variety of sizes, strengths and finishes offering total flexibility. Available in solid and hollow format for ultimate versatility with a standard strength of 7.3N/mm2 High strength blocks up to 22.5 N/mm2 are available subject to order to your specification. Masterdenz blocks are available in standard and paintgrade finishes for various applications. Quality assured manufacture. For use internally and externally both above and below dpc. Internal or external walls. Walls above and below ground level/dpc. Use in beam and block flooring. Standard - Suitable for locations where the surface will not be seen, ie plastered or rendered. Paintgrade - Suitable for locations where a consistent close textured face is required, suitable for direct decoration (note only one face and one end guaranteed). RD block - For use in Robust Details Ltd wall type E-WM-9 (Dense block laid flat).