Type O Mortar - Repointing Brick & Stone Concentrate
Type O Mortar - Repointing Brick & Stone Concentrate
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Repointing Coverage
Repointing Coverage
Brick: 1 Gallon = 30 Square Feet (based on ⅜” x ⅝” joint size).
Stone: 1 Gallon = 60 Linear Feet (based on ⅝” x ⅝” joint size).
Coverage rate estimates are based on materials mixed at a ratio of 1 part mortar concentrate to 3 parts sand. Please note that coverage rates listed are an estimate only.
Need Materials Recommendations?
Need Materials Recommendations?
If you could use a recommendation for materials to sample or use on your project, please don't hesitate to contact us and we'll do our best to help guide you in the right direction!
Request PDS
Request PDS
Specifying this for a commercial project? contact us to request Product Data Sheet PDF's. Please list each product that you require.
Restore the beauty and structural integrity of your historic masonry with our Type O Lime-Based Repointing Mortar.
This premium 1-gallon concentrate is specifically formulated for the restoration of "transition period" masonry, where traditional lime mortars were beginning to incorporate small amounts of cement. By mixing this concentrate with locally sourced sand, you can easily create the perfect mortar for your project, ensuring a seamless and historically accurate repair.
Key Features:
- Authentic Transition Period Formula: Our Type O mortar replicates the composition of mortars used during the transition from pure lime to lime-cement blends, ensuring compatibility with your historic masonry.
- Versatile 1-Gallon Concentrate: Each one gallon container yields approximately 4 gallons of ready-to-use mortar when combined with local sand, providing ample material for many smaller repointing projects.
- Lime-Based for Breathability: The lime-rich formulation allows your masonry to "breathe," preventing moisture buildup and promoting long-term durability.
- Five Classic Colors: Choose from white, gray, light buff, dark buff, or dark red to match the original mortar color of your structure. You can blend our mixes together or add additional cement-grade pigments to create custom colors.
- Easy Mixing and Application: Simply combine the concentrate with sand and water according to the provided instructions for a smooth, workable mortar that is easy to apply.
Ideal Applications:
- Repointing brick and stone masonry from the transition period (late 19th to early 20th century)
- Repairing cracks, gaps, and deteriorated mortar joints
- Matching historic mortar colors and textures
- Restoring the structural integrity and aesthetic appeal of heritage buildings
Why Choose Type O Lime Mortar?
Unlike modern cement-based mortars, which can be too rigid and trap moisture, our Type O lime mortar allows your masonry to flex and breathe, preventing damage caused by freeze-thaw cycles and ensuring a longer lifespan for your restoration work. By using a historically accurate mortar, you preserve the authenticity of your building while ensuring its continued preservation for generations to come.
Mixing Instructions:
- Combine one part Type O concentrate with 2.5 to 3 parts clean sand.
- Gradually add water until the desired consistency is achieved.
- Mix thoroughly until the mortar is smooth and homogenous.
Safety Precautions:
- Always wear appropriate safety gear, including gloves and eye protection, when handling mortar.
- Follow the manufacturer's instructions and safety guidelines for proper mixing and application.
Invest in the preservation of your historic masonry with our Type O Lime Based Repointing Mortar. Order your 1-gallon concentrate today and experience the difference that quality and authenticity can make.
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Mortar Mixing Demonstration - Quart-Size Container :
Let customers speak for us
from 22 reviewsGreat product! The packaging was excellent and quick delivery! I will definitely be sharing this company’s information with others because their product was easy to use and updated my fireplace without painting it.

Hard to find type O mortar for old bricks

It took me 30 years to get the courage to stain the god awful tan Perma stone on the front of my house. Your stain was the perfect choice. It was easy to apply and I could not be happier with the result. I went from the ugliest house in the rock to the best house on the block. I highly recommend your product.
We recently bought an older house and had no idea how to deal with the efflorescence on the bricks. I tried everything and searched everywhere for answers and finally found this company. Their products and advice have made a huge difference, our bricks look so much better now!
Highly recommend them to anyone doing home restoration or DIY brickwork.
Based on conversations with staff at ProMason, everyone is experienced and very professional. I was given good advice on how to use the product. I’m very satisfied. I have no photos at this time
We used the masonry stain in the restoration of historical buildings in Biltmore Village after Hurricane Helene. This product was approved by the Historic Committee and worked very well in application and final aesthetics, as new brick and mortar repairs were made to look aged to match the rest of the building.
Excellent product, shipping and communication. Just what I needed for my 1800's home.
First repointing project on my historic home was a success! I have never done this before but the tools and mortar mix made this a lot easier. Would definitely order from them again.
Excellent products and customer service. They are very prompt with communications and provided very helpful tips for a masonry project i am working on at my home. Their water-based masonry stain is fantastic and very good quality. I just ordered some of their repair products and am looking forward to using those and imagine they will be equally as great. Highly recommend this company.
Getting started on a big project and pro mason samples let me plan everything out. Very quick shipping and 4oz is plenty to compare on a few different spot. Will be ordering project material soon