From Morrisons
Gets to work immediatelyDissolves build up. Powerful cleaning action which powers through blockages and clears blocked sinks. Destroys bad odours. Leaves a fresh fragrance after use. For use in sink, shower and bath plugholes. Fast acting thick formula sinks to where the blockages lie. Regular use stops the build up. Safe to use with septic tanks.Safe to use in all pipes & septic tanks, Eliminates blockages within 15 minutes, For use in sink, shower and bath plugholes