ABOUT US CONTACT US (773) 588-0800 RESTORATION COATINGS & STAINS BUILDING MATERIALS CONCRETE INFO CENTER Search for: Restoration Supplier Henry Frerk Sons is pleased to offer a full range of masonry restoration products, including: The nation's broadest selection of historic lime mortars Stone, brick, and terra cotta repair mortar, and we stock the 17 most common colors used in the Chicago area Mineral coatings and stains for historic terra cotta, stone, and brick REQUEST A QUOTE About Our Historic Mortar Natural Hydraulic Lime Mortar Pozzolan Hydraulic Lime Mortar Lime Putty Jahn Repair Mortar Cathedral Stone Liquid Stain Kit Terra Cotta Glaze KEIM Mineral Coatings Restoration Cleaners & Sealers Send an Inquiry Jahn Repair Mortars by Cathedral Stone are single-component, cementitious, mineral based mortars, designed for the restoration of limestone, sandstone, granite, bluestone, marble, concrete, terra cotta, and brick. A sandstone sill repair performed using Jahn M70 Sandstone. Photo: Pawel Nawrocki, Carving in Stone Unlike competitors’ products, Jahn has specifically formulated individual lines for each substrate. Their formulas are compatibility oriented ensure that the plaster substrate react to the environment in the same way as the Jahn addition. All Jahn repair mortars are vapor permeable and contain no latex or acrylic bonding agents or additives. This protects the substrate by allowing salts, water vapor, and liquid water to reach the surface, preventing failure due to salt expansion or freeze/thaw cycles. They are single component products that mix only with water, improving quality control and consistency of application. Additionally, Jahn repair mortars have strong bonding capabilities without relying on synthetic bonding agents, are factory controlled, can be colored upon request to match the existing masonry using standard or custom colors. 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. This collection includes limestone, brownstone, concrete, terracotta, and marble mortars. We also offer in-house custom color matching and blending. Certification Requirements 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. Product Range M70 Brownstone | M70 Datasheet | Safety Datasheet | M70 Specs M70 Sandstone | M70 Datasheet | Safety Datasheet | M70 Specs M70 Limestone | M70 Datasheet | Safety Datasheet | M70 Specs M90 Concrete and Precast | M90 Datasheet | Safety Datasheet | M90 Specs M100 Terracotta & Brick | M100 Datasheet | Safety Datasheet | M100 Specs M160 Bluestone | M160 Datasheet | Safety Datasheet | M160 Specs M160 Granite | M160 Datasheet | Safety Datasheet |M160 Specs M120 Marble | M120 Datasheet | Safety Datasheet |M120 Specs Helpful Links Basic patching procedures (PDF) English | Spanish Click here for a full listing of product data sheets, MSDS, and specifications. LEARN MORE ABOUT MORTARS, COATINGS, AND STAINS… A Masonry Guide for Homeowners – A comprehensive guide to masonry materials and procedures. Selecting Proper Repair Mortars Lime Mortar Tips Paint and Stain Options Custom Matching Services CONTACT TEL (773) 588-0800 FAX (773) 588-7019 3135 W Belmont Ave Chicago, IL 60618 HOURS Monday - Friday Saturday Sunday 6:30 am - 3:00 pm 6:30 am - 11:30 am Closed NAVIGATION Restoration/ Preservation Building Materials Concrete About Us Contact Us Employment FORMS Credit Application C-CAP Form ©2021 Henry Frerk Sons. All rights reserved