Cleaning & sealing limestone benchtops

March 5th, 2019 | Cleaning Tips

Limestone Benchtops — Cleaning & Sealing Tips

Limestone presents some very challenging scenarios when used as a benchtop. It is important to understand this in view of your communication with your client so that their expectations are realistically aligned with the limitations of the stone. These can be summarized as follows:

Calcite composition

Acid Sensitivity – Limestone typically contains at least 50% calcite or calcium carbonate content and is of biological origin. This composition means that it is the most sensitive of all natural stone types to acid attack. In the case of a bench top this relates to sauces, wines, beverages, lemons, many fruits and vinegar

Absorption – Limestone has an absorption rate from as low as 0.6% to as high as 30%. Normally limestone absorption is 3% to 12% .

Ability to be sealed – Limestone, because of it’s inert calcite structure is widely regarded as the most difficult stone to seal. Actichem have developed a unique water repellent penetrating sealer namely Defender CSD50 which is highly recommended for wet areas or outdoor use.

Penetrating Sealers

To preserve the natural appearance, texture and colour of stone, mostly they are sealed with sub- surface, penetrating sealers. These special protective treatments also allow the stone to “breathe”. The limitations of penetrating sealers is that they do not provide “bullet-proof” protection. The provide a powerful oil and water repellent surface which holds staining agents out of the stone. However, some staining agents if not removed can still create permanent staining. In contrast film forming sealers change the texture and appearance of natural stone but provide a total block to staining agents.

It should be noted that

  • Sealed limestone surfaces can still be stained by acidic agents within 5-10 minutes. Especially red
    wine, vinegar and lemon juice.
  • Mostly oil staining agents are completely blocked for at least 24hours.
  • General grime, sugar and water containing foodstuffs are completely blocked for at least 24hours.
The two main options when it comes protecting limestone.

Stone Sealer Gold

  • Provides powerful oil, stain and water repellency
  • Is water-based and convenient for transport
  • Carries Green Star approval.

Defender CSD50 and Solv Sealer Gold combination

  • Provides ultimate oil, stain and water repellency (even better than Stone Sealer Gold)

Further reading:

Cleaning & Sealing Limestone Exterior Walls.

Related Posts

Urine decontamination blog post
Read more

A comprehensive guide to urine decontamination

Everything that you need to know about treating urine stains on carpets and fabrics all comprehensively covered in one awesome [...]

Read more
blueprint for post covid 19
Read more

The blueprint for post-covid-19 hygiene

Cleaning and hygiene is finally getting the attention that it so rightly deserves. For decades, we have given very little [...]

Read more
Biosan II disinfectant being applied with a fogging machine outdoors
Read more

A complete guide to the use and application of Biosan II

Why is Biosan II the best product on the market for fogging applications, and how do I use it to [...]

Read more
Carpets spot cleaned with Conquer are safe and healthy for children and pets
Read more

What makes Conquer so special?

Conquer. Possibly the best carpet stain remover in the world. Conquer is so much more than just a spot and [...]

Read more
By using this website, you acknowledge that you have read and understand the Privacy Policy. It appears you're using an old version of Internet Explorer which is no longer supported, for safer and optimum browsing experience please upgrade your browser.