Nikwax Waterproofing Wax for Leather is a safe product to use on breathable waterproof footwear. It provides instant Durable Water Repellency (DWR), maintains breathability and replenishes tanning agents in leather. It is non-flammable, contains no harmful solvents and is free of volatile organic compounds (VOCs) and fluorocarbons. Nikwax Waterproofing Wax for Leather has been specifically designed and optimised for smooth leather footwear. The Water Based formulation is directed to leaks, can be used on wet or dry leather and will not over-soften.Nikwax Waterproofing Wax for Leather liquid is a safe product to use on breathable waterproof smooth leather footwear. It provides Durable Water Repellency (DWR), maintains breathability and replenishes tanning agents. Additionally, Nikwax Waterproofing Wax for Leather liquid in black/brown restores colour. Nikwax Waterproofing Wax for Leather liquid is non-flammable, contains no harmful solvents and is free of harmful volatile organic compounds (VOCs) and fluorocarbons. It has been specifically designed and optimised for smooth leather footwear. The Water Based formulation is directed to leaks, can be used on wet leather and will not over-soften.