The strongest wood floor finish available as of 2015 is aluminum oxide. It is only available on prefinished flooring and will last for around 25 years.
Homeowners looking to refinish a floor might like the durability of an oil-based polyurethane. It is extremely tough and can withstand the wear and tear of a busy household. However, oil based polyurethane is not always a popular choice due to its long drying time, which can be up to 10 hours, and because it turns yellow with age.
Another durable wood floor finish is called an acid-cured finish. This Swedish technique is strong but can only be applied by a professional refinisher. This type of finish is extremely expensive and releases volatile odors into the air until dry.