Carr & Day & Martin Belvoir Step 1 Tack Cleaner Spray contains a blend of cleaning agents to remove even ingrained grease. The anti-fungal formula helps prevent the growth of mould and mildew and it is pH neutral so will not rot stitching or over dry the leather. Use before the application of step 2 belvoir tack conditioner. ApplicationSpray directly onto leather and wipe clean. For ingrained grease leave in contact for 5 minutes. If mould is present, make sure cloth is not re-used and it disposed of, away from leather items. Can also be used on synthetic leather. Test on a hidden area before use, results are immediate. 600ml will last up to 2 months, dependent on use.