1 Litre Fire & Flame Retardant Spray Suitable for Curtains, Upholstery, Cushions, Wallcoverings, Etc Chemically neutral and odourless and does not cause shrinkage The spray is not effected by dry cleaning, natural wear, and sunlight This flame retardant spray conforms to BS5867 part 2 types A&B (Curtains) BS476, Part 6&7 (Wallcoverings) 1 litre of Flame-Guard will treat approximately 6 square metres of fabric.