Bonstone Historic Restoration Mortar Kit, 7 lb

Description

historic restoration mortar from Bonstone is a two-component, fast-setting, lime-based, latex-modified patching system for aesthetic stone and masonry repair. The Bonstone technical data sheet lists a 5:2 mix ratio, 20 minute pot life, 30 minute set time, and 24 hour cure, giving restoration crews a practical repair material for historic structures, Dutchman joints, pits, edges, and slurry-coat work.

historic restoration mortar Benefits

• Breathable, moisture-permeable patch helps fit restoration work on masonry that should not be sealed shut.
• Fast set and one-day cure support repairs that need to move through staging without a long wait.
• Lime-based finish is made to resemble natural limestone for more convincing cosmetic repairs.
• No sanding or grinding can cut cleanup time after shaping and placement.
• Available color options make it easier to match common stone and facade tones.

This material is built for historical building restoration, but it also fits general stone patching where crews need a repair mortar that can rebuild edges, fill holes, and handle vertical or horizontal work. Bonstone lists interior and exterior use, and the data sheet notes coverage for both 7 lb and 63 lb kits along with a maximum thickness of one inch per application before multiple lifts are recommended.

historic restoration mortar Applications

• Repairing worn steps, sills, corners, and facade edges.
• Filling Dutchman joints in stone restoration projects.
• Patching pits, holes, and weathered limestone surfaces.
• Applying slurry coats for cosmetic surface renewal.
• Restoration jobs that need a mortar with short set time and breathable cure behavior.

Apply to clean, sound masonry and plan the lift thickness before mixing. Bonstone calls out a recommended application temperature around 75 F, with the 7 lb kit covering about 75 square feet at one-eighth inch thickness. When deeper rebuilds are needed, use multiple applications rather than forcing the full depth in one pass.

See our specialty chemicals category for related repair and surface-prep materials. For manufacturer information, visit Bonstone.

If you need help with kit size, color selection, or restoration workflow questions, call (800) 220-1966 or email [email protected].