fbpx

Limestone cleaning & sealing tips

October 24th, 2018 | Stone & Tile

Limestone, with its timeless elegance, graces many exteriors, offering both beauty and durability. However, its porous nature makes it susceptible to staining and weathering over time. Proper cleaning and sealing techniques are paramount to preserving its allure. This Limestone cleaning and sealing tips guide delves into essential tips for effectively cleaning limestone surfaces and explores the best sealers tailored for exterior walling, ensuring lasting protection and maintaining the splendor of your limestone installations.

What is the best sealer for Limestone exterior walling?

Limestone Exterior Walls

When applying a penetrating sealer to Limestone exterior walling, you are first and foremost requiring water repellency. There are good options for this in both water and solvent-based options. The 4 best products for this application are:

  1. Defender CSD 50 – Provides water repellency and surface consolidation (strengthening)
  2. Defender Gold WB – Provides premium water repellency as well as a high degree of oil repellency
  3. Defender SV – Water repellent and rising damp cure (solvent-based)
  4. Defender WB – Water repellent. (water-based)
What coverage would I expect to get from a penetrating sealer on a Limestone exterior wall?

Limestone is typically very porous. However vertical surfaces tend to accept less sealer. Probably around 1Lt per 4m2 / application. To assess coverage, if the area to be treated is large, complete a trial of few square metres.

How many applications should I do of the sealer?

The standard amount of applications is two. However, please note that three applications may be required if the surface is highly porous.

How do I clean the surface of the stone before applying the sealer?

Best results will be achieved using Tile & Grout Power (dilute 1:60). Use Chlorosan for any mould or discoloured areas which remain. Rinse the surface very well after cleaning. Leave walls approximately 24 – 48 hours between cleaning and sealing.

Related Posts

Natural Stone
Read more

How to dip seal natural stone

Dip sealing natural stone is an important process to protect all six sides of the stone and prevent water ingress. [...]

Read more
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

Download our Restoration Brochure! Gain the confidence to handle any restoration challenge effectively.

  • Discover our disaster restoration product range
  • Expert tips and tricks for mold, flood, and fire restoration
  • Access easy-to-read guides.

Download Restoration Handbook

Fill in your details to download our disaster restoration handbook.

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.