NF T34-201-5*NF EN 927-5:2007 Paints and varnishes - Coating materials and coating systems for exterior wood - Part 5 : assessment of the liquid water permeability.
2007NF T34-201-5*NF EN 927-5:2007 Paints and varnishes - Coating materials and coating systems for exterior wood - Part 5 : assessment of the liquid water permeability.