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Henry Frerk Sons is pleased to be distributor of JAHN Repair Mortars by Cathedral Stone Products. This
single-component, cementitious, mineral based mortar is designed for the restoration of limestone, sandstone, granite, bluestone, marble, concrete, terra cotta, and brick. Unlike competitors’ products, JAHN has specifically formulated individual lines for each substrate. All Jahn repair mortars are vapor permeable and contain no latex or acrylic bonding agents or additives. See color options here
We have created the Chicago Color Collection, which contains 18 repair mortars selected just for Chicago. These colors match many of the most common stone, concrete and terra cotta materials found in Chicago and neighboring cities, and all colors are in stock at Henry Frerk Sons. (Call to confirm stock quantities.) This collection includes limestone, brownstone, concrete, terracotta, and marble repair mortars. We also offer in-house custom color matching and blending through our restoration laboratory.
Only Certified Installers may purchase Jahn Repair Mortar. We offer certification to enable contractors, architects, and other professionals to obtain the required product certification. Our classes are two-day sessions and are discounted to $450.00 per person. Check the current schedule for upcoming classes
Basic patching procedures (PDF) English | Spanish
Stock color chart <pending>
Chicago color chart <pending>