Demonstrating Our Proprietary Air Hammer at Green-Wood Cemetery

When it comes to restoring stone, a good repair is all about what you don’t see. A smaller, more irregular repair is sometimes less visible. It can be stronger, too, which is what long-lasting generational repair is all about. I see our product line as materials and tools that make the “invisible” masonry repair possible.

Each month, at Green-Wood Cemetery Historic Site, we invite engineers, architects, and other preservation professionals to learn about our environmentally friendly, non-acidic materials—not just our famous Jahn Mortars, but our full line of products, which include non-acidic cleaners, paint removers, repellants, coatings, and specialty restoration tools.

Cathedral Stone product demo

Getting a Feel for the Products

Attendees participate in our hands-on product demo, held at Green-Wood Cemetery Historic Site.

Attendees are sometimes surprised to learn that our line includes a proprietary tool that is unique in the industry: a pneumatic, light-duty chisel we designed solely for the detailed work that is so critical to effective restoration of sensitive historical stone.

Making Invisible Repairs

Our proprietary pneumatic, light-duty chisel allows for smaller repairs.

What makes it different? A lot of people approach a repair with a hammer and chisel or a speed grinder—but that turns a repair the size of my thumb into one the size of my head. Grinding is often overkill and makes the repair area much bigger than it has to be, which puts a structure at risk of a failed repair.

Professionals in Preservation

The group included engineers, architects, specifiers, and other preservation professionals.

The team at Green-Wood Cemetery Historic Site got hands-on experience with how our tool minimizes the size of the repair, preserving the physical integrity of the stone and allowing for a repair that blends in. Again, it fools the eye. And it’s rebuilt to last.

Craig Schnellbacher, Senior Technical Specialist

Technical Services Manager, NE Territory

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Waterless Cleaning at St. George’s School

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An Architectural Field Trip to Green-Wood Cemetery National Historic Site