Lime Masonry Patching Mortar - High Build
Lime Masonry Patching Mortar - High BuildNot sure of the color? Pick the Quart – Sample & Small Project Size to test it at home before the full order.
Shipping & returns
- Ships from Olathe, Kansas by UPS, usually within 1–2 business days.
- Rates are quoted live at checkout for your ZIP code.
- Items with a pallet option ship free on the pallet size. For large orders of other items, contact us.
- We deliver to UPS addresses in the continental US.
- Returns or a damaged order? See our Return & Refund Policy.
Part of The Pro Mason System. Clean, repair, protect: see how it works · project guides · FAQ
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Not sure which to pick?
Not sure which to pick?
Tell us about your project and the year your home was built, and we'll suggest a good place to start. Ask us here.
Pick High Build to rebuild missing sections, deep chips and broken corners of brick or stone, including on vertical and overhead surfaces.
| Product | Best for |
|---|---|
| Repair Grout | Hairline cracks, voids and injection in walls |
| Low Build | Shallow wall repairs to 1/4 in. and fine finish detail |
| High Build (this one) | Deep wall and overhead repairs, 1/4 to 3 in. per lift |
| Brick Kit | High Build + Low Build, red-toned, for brick walls |
| Limestone Kit | High Build + Low Build, buff-toned, for limestone walls and trim |
Steps or other high-wear masonry? Use Fast-Repair. Concrete flatwork? Use High Strength Concrete Patch. Pure lime patches are generally too soft for those areas. Shallow surface repair? Use Low Build.
- Deepest lime repair in our lineup - lifts from 1/4 in. up to 3 in.
- Fiber-reinforced and lightweight - holds on walls and overhead.
- Carvable after it sets - shape and sand it to match the stone.
- Five colors - Natural White, Gray, Light Buff, Dark Buff or Dark Red; tint, stain or paint.
How the job goes
- 1. Prepare. Remove loose material and dampen the masonry.
- 2. Mix. Add water to a stiff-clay consistency, rest a few minutes, then remix.
- 3. Build and shape. Build up in lifts, then carve and sand to match, and protect while it cures.
Sizes
- Quart (sample and small projects)
- Gallon (standard size)
Safety: lime is caustic. Wear gloves and eye protection.
More about High Build
When a sill spalls, a carved edge breaks away, or a brick face is missing, the repair has to stand up on its own. High Build is our deepest lime patching mortar: a pre-blended hydraulic lime mix with fine fibers that holds on vertical and overhead surfaces, without Portland cement, so it stays breathable alongside the old work.
Add water gradually and mix to a dry, workable consistency like stiff clay. Let it rest a few minutes, then remix. Build up in lifts from 1/4 inch to 3 inches. We recommend working when it's above 40°F, and protecting fresh work from freezing while it cures.
Because it is lime, it stays carvable and sandable even after the initial set, so you can shape edges and tooling marks to match the surrounding stone or brick. Tint it with cement pigments, or stain or paint it once cured. For a crisp final surface, finish with a thin layer of Low Build.
High Build is made for walls and overhead work and typically shouldn't be used on steps or flatwork, because pure lime patches are generally too soft there. For steps and other high-wear masonry, or a patch that needs to set in minutes, use Fast-Repair; for concrete flatwork, use High Strength Concrete Patch. To get both lime mortars together with matching pigments, see the Brick Kit or Limestone Kit.
Let customers speak for us
Came out beautiful and better than I had hoped
Shipped quickly. Arrived quickly. It mixed easily and adhered to my spalling bricks. So far so good.
The perfect mortar for 126 year old bricks (granite boulder and brick foundation built in 1900). Very happy with the mortar and clear instructions. Thank you ProMason!
Worked perfectly. Stain changed color of existing brick to the tone I was expecting giving it new life and blends with other new finishes.
I haven't had a chance to mix and use the mortar yet. However, the customer service is great. They immediately sent a replacement package of colorant since the original had leaked.
Our project turned out wonderful! What an amazing difference. It completely changed the look of the house!!
Easier to apply than I anticipated.
My first time staining brick and I was nervous on how it might turn out because I was going from dark brown tone bricks to gray tone (before and after photo submitted)Blended my own color combo and It looks amazing.
The stain covers well and a quart did a good amount of surface area. The perfect shade was achieved by mixing 2 colors. It looks great and is a nice brick border update!
The masonry sealer worked great. It was easy to apply and dried perfectly.
So far, so good. It will take time.
I just tried the mortar out. Need to learn a little more about using it as what I applies turned white. Yes it was sunny and hot. I tried keeping it spritzed and ended up shading the work with tarps, but too late. I’ll try again next week since I see a cloudy day in the forecast. Marie
We took down the Wood pan line in our old home. Built in 1880. All the room is red brick. Except for this one spot that it looks like they ran out. Using pro Mason stains, I was able to make coordinate better with the rest of the room. Very happy with the results! It would have been impossible to achieve without being able to dilute and combine the stains to make multiple colors to match the variants in the original bricks.
Working out great so far
This was awesome. It mixed very well, and even though its still curing, it is very hard now. It was also fun to mix up a mortar by hand the same way they used to do back in the day.
I had my steps repointed but they were way to light and slot of cement left on the brick. These stains worked amazing. Darkened the mortar and made the bricks look new!! Love this product! I used dark buff for the mortar and mixed burgundy and dark red for my brick.