Cleaning & sealing limestone benchtops

March 5th, 2019 | Stone & Tile

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

Read more

Epoxy Grout Smear

Epoxy Grout Smear When it comes to tiling projects, achieving a flawless and long-lasting finish is the ultimate goal. However, [...]

Read more
Read more

Maintaining Natural Stone Benchtops

Maintaining Natural Stone Benchtops Natural Stone. A rare piece of art we use in our everyday life. As it is [...]

Read more
Removing oil stains concept
Read more

How to remove oil spots from concrete and stone surfaces

Oil stains are an unsightly addition to any porous surface. Download PDF article here Whether it be concrete, natural stone [...]

Read more
Read more


All your questions regarding efflorescence answered in one handy article. Let’s start with the word itself. How do we [...]

Read more

Join us for our FREE Webinar!

Mastering Urine: Destaining & Decontamination

Join Actichem for an insightful webinar exploring advanced techniques and solutions for effectively handling urine stains on a range of different surfaces, from bathrooms to carpets and hard flooring. From eliminating visible traces to tackling deep contamination.

Date: Tuesday 12th December

Time: 9:00am

 - 9:30am AEDT

Sign up for the webinar

Fill in your details to signup for our webinar to subscribe to our newsletter

Restoration Handbook Download

Fill in your details to receive a download link for the Restoration Handbook

Stone Handbook Download

Fill in your details to receive a download link for the Stone Handbook

Actichem Catalogue Download

Fill in your details to receive a download link for the catalogue. 

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.