Last Updated on October 26, 2026 by Royal Stone Care
Limestone flooring offers a great combination of durability, resistance to heavy foot traffic and a timeless aesthetic appeal, whatever the style and size of the space. Not only that, but you can look forward to outstanding compatibility with under-floor heating. Plus this material is sustainable and environmentally friendly while requiring very little in the way of upkeep and maintenance.
However, this highly porous stone also easily absorbs stains, oils and dampness. That makes regular sealing vital to form a protective barrier against these potentially harmful elements, while allowing the stone to breathe. Sealing also safeguards against permanent staining, plus it makes cleaning easier and prevents deterioration of your flooring.
What does a sealant do?
A high-quality sealant fills in microscopic pores in the limestone that would otherwise cause liquid staining and ingress. Really you need to reseal your limestone every year or two for countertops, every three to five years for flooring. And you can either do the task yourself or call in the professionals.
Even everyday products such as washing-up liquid can affect sealants if you just leave them on the stone’s surface.
Why you need a tailored approach
Limestone’s unique characteristics, combined with environmental factors, mean you need to adopt a tailored regime for floor maintenance. Rainfall, dampness and fluctuations in temperature all play their part in affecting limestone’s performance and longevity. So, for example, in particularly wet parts of the country, there’s a greater chance of staining or other damage without proper sealing.
What’s more, the cycles of freezing and thawing in winter can cause cracking in limestone, which calls for a resilient yet flexible sealant. So, in summary, you should seal tiles in keeping with the local climate.
Frequent cleaning when it’s wet, along with regular routine inspections, will maximise the effectiveness of your chosen sealer. Once dirt and debris embed themselves in the stone, they can discolour the surface. Use pH-neutral cleaners designed specifically for this stone clean more frequently in areas with heavy foot traffic.
For limestone floors, regular sweeping and vacuuming get rid of any grit which could scratch the limestone. And it’s always worth using entrance mats, along with felt furniture pads on the legs of your furnishings. Use a damp (not wet) mop and a pH-neutral stone cleaner when cleaning.
And because the power of sealants lessen over time, regular reapplication is needed. Talk to your limestone care experts about how often this will be necessary. But in winter, for example, you may need to do it more often.
Consider the type of limestone
This is also important. For example, darker Magnesian limestone is highly vulnerable to weather damage. So it needs sealing with a superior-quality product. Meanwhile, Cotswold limestone has a rustic appeal with its warm tones, so it’s understandably very popular. But it can be susceptible to efflorescence, or the formation of powdery white deposits when liquid seeps through the stone.
So understand the particular properties of the limestone variant you choose.
What sealants are available?
- Topical sealers create a protective film on the stone’s surface which act as a barrier against liquid, moisture, dirt and staining. They can also bring out the stone’s colour and shine.
- Enhancing sealers protect the stone and emphasise its natural colour and texture to show off its beauty in a way that the alternatives simply don’t manage, adding richness and depth.
- Impregnating sealers are ideal in areas which are especially susceptible to staining and dampness. They form a barrier which shrugs off water and oil-based stains, while still allowing the stone to breathe, offering long-lasting protection.
So when selecting a sealer for your limestone floor, bear in mind the particular conditions of the area, the local climate and the type of product used. If it all feels too much, or you’re not sure, call in the limestone care professionals.
Post-sealing tips
Once your limestone has been sealed, here are a couple of things to bear in mind:
- Allow the sealant to cure fully for a good six hours before you let any liquids anywhere near the surface.
- While the stone is drying off, keep any pets well away.
Try the water test
Drop a small amount of water on the stone to do this test. See if it beads, in which case you have a functioning limestone seal. But if it starts to darken the stone within a few minutes, you may need to consider resealing your stone.
Give Royal Stone Care a call
At Royal Stone Care, we offer limestone chip repair, cleaning and restoration in London, plus we also look after a host of other materials. Thousands of business and domestic customers trust us implicitly, and you could join them.
