Lime Mortar Concentrate - PHL 3.5
Lime Mortar Concentrate - PHL 3.5
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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 timeless beauty and structural integrity of your historic masonry with our PHL 3.5 Lime-Based Repointing Mortar. This premium concentrate, available in convenient quart and gallon sizes, is formulated with no Portland cement.
This mortar provides similar performance, breathability, and historic characteristics of NHL 3.5 moderately hydraulic lime mortars. By blending this concentrate with locally sourced sand, you can effortlessly create a historically accurate and durable mortar, ensuring a seamless and long-lasting repair for your cherished structures.
Key Features:
- Authentic PHL 3.5 Formulation: Our PHL 3.5 mortar is a pozzolanic lime mortar, a historically accurate blend of high-calcium lime and reactive clays (pozzolan). It is free of Portland cement, making it ideal for repairs on historic masonry originally built with lime mortar. Our 3.5 formulation is between the 2.0 and 5.0 mortar strengths. It is ideal for moderate weathering environments. Typically choose 2.0 for very soft and fragile masonry repairs and 5.0 for high-weathering-exposure environments.,
- Versatile Quart & Gallon Concentrates: Choose the size that suits your project needs, with each container yielding approximately 4 times its volume in ready-to-use mortar when combined with local sand.
- Breathable for Optimal Moisture Management: The lime-rich formulation allows your masonry to "breathe," preventing moisture buildup and promoting long-term durability.
- Five Classic Colors: Select from white, gray, light buff, dark buff, or dark red to help match the original mortar color of your historic structure.
- 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 historic brick and stone masonry built with lime mortar
- Repairing cracks, gaps, and deteriorated mortar joints in older structures
- Matching historic mortar colors and textures
- Restoring the structural integrity and aesthetic appeal of heritage buildings
Why Choose PHL 3.5 Lime Mortar?
Unlike modern cement-based mortars, which can be too rigid and trap moisture, our PHL 3.5 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 PHL 3.5 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 PHL 3.5 Lime Repointing Mortar. Order your quart or gallon concentrate today and experience the difference that quality, authenticity, and breathability can make.
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Mortar Mixing Demonstration - Quart-Size Container :
Let customers speak for us
from 26 reviewsNeeded a product and was able to get it through Promason Supply. Shipping was fast too
The lime mortar product was effective and easy to use, just as it was advertised. Also, they offer a military discount and every little bit helps in today's economy. Lastly, they are responsive when you contact them. I recommend ProMason to anyone doing lime-based restorations.
The masonry / brick stain we got was exactly what we were looking for!! We got the charcoal and mixed 2:1 with water. You can see the difference from our orange brick before to our now dark charcoal brick. It looks even better in person because you can see the variegation in color of the brick rather than just a solid paint color. This will definitely last much longer too!
My stain arrived very well packaged... no leaking. The painters put it on undiluted and my house looks like a new build! Not almost 50yo. Other subcontractors have asked what and where... I always share! I still have some changes going on but this shows the dramatic change. Blending new brick with old is what I was trying to accomplish.
Great 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