Fernox Hawk White is a pipe jointing paste for all general work. Conforms to BS EN 751-2:1997 Part Class A & BS 6956 Part 5 1992. Suitable for Natural Gas, LP Gas, non-potable water, low pressure steam, alcohol and brine. To meet BS EN 751-2 on pipes 25mm to 50mm, approved reinforcing fibre must be used. The BS does not apply to pipe over 50mm. For 1st, 2nd, and 3rd family gases to 5 bar and 70°C, and for water to 7 bar and 130°C, when used as instructed. Non-toxic and environmentally friendly