Print
Add to Favorite 
How to Use Exterior Stone Sealer
Post Date: 30 Apr 2009 Viewed: 1013
There are many different kinds of exterior stone sealers. Some proprietary products and silicates, mineral glasses, are difficult to use. Drying oil yellows as it ages and stearates have a short life span. Siliconates tend to look speckled on dark stone. The best exterior stone sealer is a siloxane sealer.
Step1
Calculate how much sealant the job needs. When you apply the siloxane exterior sealer, some stones just suck it up because they're more porous. If you apply the sealer to limestone, sand, gravel, concrete, granite, stone, brick, masonry, stucco, sandstone, flagstone or split-faced block, you need 1 gallon for every 75 to 100 square feet. Stucco, synthetic stone or precast and architectural concrete require a gallon for every 100 to 125 square feet.
Step2
Clean the surface of the stone before applying the exterior stone sealer. Use sandblasting or waterblasting for best results. If you use a method that involves water, dry the entire area before you apply the stone sealer.
Step3
Check with the weatherman before starting. Apply the sealer in dry conditions at temperatures between 40 and 100 degrees Fahrenheit.
Step4
Use low pressure (15 psi) airless equipment for best results. You can apply the sealer with a roller, brush or mist sprayer. However, the sprayer wastes more sealant and slows the application.
Step5
Spray the area thoroughly. When you apply the exterior stone sealer to something that is vertical, expect it to run about 6 to 8 inches before it begins to soak into the stone. It needs to flood horizontal areas. Make sure you clearly mark the area where you stopped if you must pause before completion.
