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Cathedral Stone Products 2nd quarter newsletter has been added to the News section of our website. The link to the News section of our website can be found at the bottom of the page.
The Cathedral Stone Difference

Restoring It Right The First Time

Cathedral Stone Products began doing it the "right way" thirty-three years ago when they began importing Jahn Restoration Mortars from Holland. Dennis Rude, founder of Cathedral Stone Company in 1977, began studying better masonry restoration with Heinz Jahn to learn why masonry restoration failed so often in his experience. Approaching restoration scientifically, by testing the substrate for physical properties and developing repair materials that match those properties, Jahn was able to eliminate the possibility of failure. ( read more )

These mortars are manufactured and tested in the United States, with an on-site laboratory for quality control testing, and for the development of other State of the Art products such as:
  • - Acid Free Paint Strippers
  • - Revolutionary Water Repellents
  • - Laboratory Tested and Manufactured Mortars
  • - Potassium Silicate Coatings
Want to learn the story of how we engineered our advances? Click Here.


Read: Our Products in the News

Read about our historic repair mortars in this great article from Masonry Magazine about the work done on the Historic Cut River Bridge using our M70, M110 and M40.
Click here to read article.



Read about our waterless cleaner in this article from Masonry Magazine on the amazing work done on the interior of the Nebraska State Capital.
Click here to read article.

Read about our participation in the assessment of Jahn Permeable Mortar System on a historic bridge abutment application.
Research Completed Projects




Watch: How Salts Effect Masonry

Dennis Rude, Founder of Cathedral Stone Products, gives an impromptu lesson in CSP's lab on how salts effect masonry, the importance of using proper mortars and products on stone that are breathable and why salt testing is a must for compatibility resulting in lasting repairs.