NF T34-721-3:1999 Paints and varnishes. Coating materials and coating systems for exterior masonry and contrete. Part 3 : determination and classification of liquid-water transmission rate (permeability).
1999NF T34-721-3:1999 Paints and varnishes. Coating materials and coating systems for exterior masonry and contrete. Part 3 : determination and classification of liquid-water transmission rate (permeability).