How to prepare new and old concrete or patio stones for sealingJune 20, 2007
Q: Shell, I have a new concrete driveway and feel it is time to seal it and I have older concrete patio in back as well an area of patio stones and would like the proper procedure to seal and protect all the surfaces.
A: Lets start with the new concrete and patio stones;
Before sealing you must acid wash the surface to etch the cement to enhance penetration of the sealer.
Use a solvent based concrete sealer for the initial application; 2-3 years down the road, acrylic coatings may be used.
If badly stained (blotchy), follow brightening procedure before sealing.
If concrete has never been sealed but comes clean after use of Shell Busey Home Cleaning Formula, proceed with the following:
* Acid wash the surface, using 2/3 water & 1/3 Muriatic Acid, be sure to add the acid to the water, NOT the other way around.
* Allow to sit until a foaming action occurs, scrub with a stiff bristle brush and then rinse and allow to dry.
* It is best to apply the sealers using a low-pressure garden sprayer, or puddle on the surface and spread with a 10mm roller.
Caution: Wear safety glasses, clothing & rubber gloves when working with Muriatic Acid.
DO NOT DO THIS PROJECT IN DIRECT SUNLIGHT
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