How to get the best mortar color match?
Select an area you will be patching that shows the color you want. Chip a piece of the substrate off (quarter size minimum). Hold the sample you have removed up to other places you intend to repair and verify it matches. If it doesn't match you may need more than one color match. Once you have collected your samples place a mark on the side that matches the color you want and place each sample in a sandwich bag. Fill out the color sample information sheet (LINK) and ship samples to Cathedral Stone Lab.
When you get your mortar samples install them in the same area you removed the stone chip. Install mortar according to application instructions and finish to match surrounding substrate. Wait 3 days after installing mortar to evaluate colors. This will ensure you get the most accurate color match.
Why do some patches get a white haze?
This haze is most commonly seen in dark colors and is a result of moisture. The source of the moisture can be in the substrate or humidity in the air. If you can, cover the work area to prevent additional moisture from getting to the substrate. If that's not possible you may need to wait until weather conditions improve.
Why do some patches get lighter than others?
Water. Water will lighten the color of your mortar. Careful measuring and mixing will help eliminate this. If your repair is fresh and it begins to rain or heavy dew sets in the pigment on the surface is diluted and the patch will lighten. Keep an eye on the weather and keep plastic handy. Cover patches loosely so the plastic doesn't touch the patch.
Can I change the color of a repair that's cured?
Patches can be stained using the masonRE mineral stain. This is also an easy way to enhance or add multiple colors to repairs.
How deep can I install the mortar?
With the exception of a few mixes (M100, M110-JB and M120) the mortar has no depth limitations.
Can I work in lifts/layers?
Lifts are not a problem at all just make sure the surface of your first lift is rough. (photo) The second lift will use the same application procedures as the first.
When should I use pins/anchors?
Good common sense can only take you so far.. If you think you may need pins/anchors consult with a local engineer.
Which paint stripper should I use?
The one that works best is simply better suited to remove that paint on that substrate. The best way to determine which paint stripper is best suited for your project is to request samples of our paint strippers and test the area to see which product is most effective for your project.
What is the best way to apply the paint stripper?
Airless sprayer for large areas and trowel-on smaller jobs. Always be sure to apply a thicker coat than the coating your are trying to remove to ensure efectiveness.
How long will the stripper take to remove the paint?
Dwell time depends on many factors, but after about 4 hours you can test your results. Some coatings require 24+ hours to release. Do not allow the paint stripper dry out or you will need to reapply.
Will MasonRE R-97 change the color of the substrate?
No. When dry, MasonRE R-97 is invisible.
Will MasonRE R-97 harm glass?
No. However, be sure the glass is clean. Dirt on the glass will react with the R-97 and be much harder to clean off after.
What is the coverage rate for MasonRE R-97?
The coverage rate for R-97 will vary depending on the porosity of the substrate. However, 100 to 200 square feet per gallon can be expected.
