'Odour Neutralising Agent' (O.N.A.) Liquid can be used in many different applications and is very versatile. Available in a 1 litre bottle, 'Odour Neutralising Agent' (O.N.A.) liquid can be used as a wash-down product for rooms or materials where odours need to be removed and where odours have penetrated textured surfaces such as cloth. Please Note: as with all surface treatments, you will need to test a small area first to make sure no damage occurs. It can also be used in commercial misters mixed with water (at a neutral pH) to the desired strength or as a regenerator liquid for our gel based product. Available in two scents: Linen and Pro.