Modern chemistry has done us all a favor by bringing back these traditional, hand-rubbed oil finishes in a format that requires far less maintenance. Hard-wax oils are a hybrid of oil and wax, with a chemical catalyst that triggers a hardening action. The result is a durable, low-maintenance protective finish with all the aesthetic qualities of linseed or tung oil.
Rather than building a film of resins or plastics on top of the wood surface like a polyurethane, hard-wax oils work by saturating and bonding to wood cells, then hardening. Excess oil is wiped off, resulting in a lustrous, velvet-like texture that sits level with the floor surface rather than on top.
In addition to the aesthetic benefits, hard-wax oils offer three major benefits:
Permanent. Traditional polyurethanes will fade and turn yellow over time. Hard-wax oil, by contrast, will only deepen and intensify with age. As long as it is periodically refreshed with maintenance coats, there is a real possibility you will never have to pay for a full refinish.
All that being said, are there any downsides? Just a couple:
Sheen level. This isn't really a downside, but just something to be aware of. Because it is a penetrating finish, hard-wax oil has a very matte luster. Most homeowners who choose hard-wax oil do so for this reason, but if you are looking for a glossy, mirror-like finish, you're better off with a polyurethane.
Expense. Both the product itself, and the labor-intensive application, result in a 25-50% increase in cost.
10" wide heart pine floors in the 18th century Francis Nixon House outside of Hertford, NC. Showcasing Poloplaz OMU.
On the downside: they are double to triple the cost of OMU finishes. Additionally, the water contained in these finishes can expose minor flaws in the wood that lead to additional repairs at an awkward stage in the process. Certain types of wood are not good candidates for a waterborne finish.
Antique oak boards finished with "Magic Oil," a leading hard-wax oil product
Hard-wax oils are a next-generation take on an old-fashioned recipe. In decades past, natural, penetrating finishes such as linseed oil and tung oil were used to give color, luster, and sheen to hardwood floors.
But because they held up poorly to foot traffic, they required a protective coating of wax that needed frequent maintenance and polishing. With the advent of polyurethanes, these finishes were no longer viable.
Finishing is the final step of a flooring project, and perhaps the most critical. Finish both protects your freshly sanded floors and enhances the aesthetic qualities of the wood.
What makes a good quality finish? We've put in considerable time and experimentation to identify products that would meet three criteria:
Oil-modified urethanes (OMUs) have been the industry standard for at least fifty years, and not without reason. They're inexpensive, easy to use, long-wearing, and attractive.
On the downside, it stinks! If you're sensitive to strong smells, you'll want to make plans to be elsewhere while your floors are being coated.
Drying time: it can take up to 14 days to
reach its final hardened and cured state.
You should make plans to stay off your
floors for 24 hours after the final coat,
and if possible avoid moving furniture
back in for 48 hours. Rugs should not be
placed for two weeks to allow for curing.
Our preferred brand is Poloplaz, among
the hardest finish available in any
category, and extraordinarily attractive.
The selling points of a waterborne polyurethane include light smell, quick drying and curing, and high wear resistance. It's great for scenarios with high traffic, where a quick turnaround is desired, or for anyone sensitive to strong solvents.
Lastly, as they age, waterborne polyurethanes
can end up with a hazy, plastic appearance.
Despite these drawbacks, there is a definite place for waterborne polyurethanes, and products continue to develop and improve as time passes.