The product has successfully removed biological, carbon, and rust staining on other difficult-to-clean projects where our standard cleaners and removers were not as effective.

We were contacted by Michael Higgs, the Cave Hill Cemetery Foundation Manager, who wanted to learn more about our products and best practices for preservation of historic monuments, mausoleums, and gravestones.

Every CSP product is laboratory engineered to clean and remove specific types of debris and staining without the need for acids--even carbon and rust staining can be safely removed.

Cathedral Stone Products continues to innovate and improve on our best-in-class Jahn Restoration Mortars.

Is it too hot or too cold? Are we in the sun or the shade? Will it go below freezing tonight? The list goes on and on.

We then used a darker M70 to refill these channels. This replicated the burrows nicely.

When the right mortar is applied correctly, over a properly prepared surface, the repair can, and will, last more than 30 years.

The more I learned about the project, the more I understood that the lighthouse's location was going to be the biggest challenge.