Anhydrol forte roll on is a clear colourless liquid that contains nofragrance the active ingredient aluminium chloride works by blockingthe sweat glands this causes the pressure of fluid within the sweatglands to rise to the point where it shuts off sweat production theantiperspirant is applied before going to bed at night and should bewashed off in the morning it should not be re applied during the dayover time sweating will stop during the day and the number of times youapply the antip