Wine cellars are part of a home or business that usually do not get as much attention as more highly trafficked areas. Unlike a garage or a traditional basement, they are hardly integral to the structure or function of your home or business. However, they can house an expensive and valuable collection of wine that often requires perfect environmental conditions to ensure the preservation of the liquids.
Most wine cellars, like regular cellars and basements, are constructed from concrete. A strong, durable material, concrete can last forever and will protect your interior from the perils of the outdoors. However, concrete is far from a solid material. While it is extremely strong, concrete is also incredibly porous, which is a direct result of its mixing process. Concrete is really just a mixture of a few different materials that bind together to create the final material we call concrete. A by-product of this mixing process is a large number of holes and tiny air pockets that fill the concrete, making it porous and susceptible to the passage of water or potentially harmful natural gases like methane and radon.
Concrete that has just been poured and cured, even properly cured, will not be up to its optimal potential strength. Instead, that concrete needs to be treated with a concrete sealer. A wine cellar requires a quality concrete sealer more than a typical basement, as its contents tend to be more precious than those of the average basement.
For a concrete wine cellar, the best choice would be a silane/siloxane sealer with stain resistance, like Siloxa-Tek 8505 or Siloxa-Tek 8510 (a higher performing, solvent based version of the 8505). The Siloxa-Tek's contain particles that will penetrate into the concrete material past the surface pores, filling the porous holes and hairline cracks with its material. This protects the concrete from the incursion of water, and the passage of moisture keeping the concrete completely dry. The Siloxa-Tek sealers will also seal the surface of the concrete, working on both levels to protect your wine cellar. An added benefit is the addition of a proprietary fluropolymer which gives resistance to staining, so if any wine were to spill on the concrete it would allow for easy clean-up.