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Mortar Repair Kit HRM

Product Details :
4.00 LBS
Calculated at checkout
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Product Description


This versatile patching kit is ideal for repairing chips, cracks, broken off corners with limestone, sandstone, brick, terracotta, precast and concrete. This lime-based mortar is a breathable system which allows for vapor transmission. The kit enables you to patch common job site repairs. Additional tints are available for custom matching.



  • Skim coats on pitted surfaces
  • Crack Filling
  • Capping material for crack injection
  • Porous stone
  • Dutchman joint repair
  • Inexpensive
  • Great for mock-ups
  • Colors can be mixed together for slight variation


Kit Includes:

•3– 8 oz containers of HRM (Buff, Gray and Neutral) 

•one 8 oz latex binder 


•mix sticks  


•mix cups  

•pair of gloves   

•Instructions included for repair applications and techniques.


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Product Videos

Limestone Crack Repair/Injection Using Bonstone HRM and Clear Gel 02:00

Crack injection demonstration using using Boston Historic Restoration Mortar (HRM) and Bonstone Clear Gel. Historic Restoration Mortar (HRM) is a two-component, lime-based, latex modified mortar for the restoration of historic masonry structures. It is ideal for pits in the face, open cracks, and patching for limestone and sandstone. Bonstone Clear Gel epoxy is a versatile product which can be used for a wide variety of applications. As a knife-grade epoxy, the consistency of Bonstone Clear Gel allows you to squeeze out thin bond lines, so clamping doesn’t produce a mess of displaced adhesive.

  • Limestone Crac...
    Crack injection demonstration using using Boston Historic Rest...


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