Help! The paint is peeling off of our porch, what do we do?





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Cass on Dec 01, 2016
Was it thoroughly dry, concrete? Takes forever. I know. Painted paving blocks. Days to dry. Remove / scrape loose paint. Sand remaining. Without removing all paint you may have ridges. Big job.Helpful Reply -
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William on Dec 01, 2016
Typically failures like these are caused by a combination of factors, not just one. It sounds like the stain never really penetrated into the concrete and is acting like a bond breaker to the sealer. Water-based stains are nonreactive and rely solely on the porosity of the concrete to penetrate and hold the color. If the concrete is not porous, the stain will simply lay on the surface. The other more likely possibility is overapplication of the stain. If a water-based stain is overapplied, the surface tension of the water tends to keep the stain on the surface. When the water evaporates, it leaves a high concentration of stain residue, which acts like a bond breaker when the sealer is applied. If the coating is peeling, I would have to guess that the concrete was not properly cleaned or etched. Any oils, dust, moisture or dense troweled areas will be difficult to get proper adhesion to the substrate without proper surface prep. Check the back of a peeling sample of the coating for any contamination such as dust or dirt. If the back of the sample looks clean, try a few drops of water on the area where the coating failed. If the water absorbs into the concrete and does not bead then you may be able to abraid the surface with a concrete rubbing stone to add a profile for bonding. if water beading does occur, then the areas of the failure should be degreased and rinsed with clean water and allowed to dry before trying to recoat. Before trying to recoat any of these areas, you should pressure wash and scrape the entire surface to look for more areas of loose stain that have not lifted yet. The one thing in preparation of concrete is the use of the bonding primer. The Bonding agent is a milky liquid that is rolled on and allowed to dry for at least 4 hours before applying the stain.It feels a little tacky when dry. The bonding agent is used only on previously unpainted concrete The finish should be removed before any further treatment, either by chemical strippers or use of a grinding machine to abraid the surface clean. This essential step opens the pores of the cement and prepares it to absorb stain. Penetrating sealers, like concrete stain, must absorb to ensure both their color and waterproofing protects the new surface from damage. Sorry for the bad news but I hope this info helps.2 marked as helpful Reply- See 2 previous
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Susan on Dec 02, 2016
Call someone who specializes in this. It doesn't pay to be cheap.Helpful Reply -
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Linda on Dec 03, 2016
Glue outdoor carpet on it, works great and looks nice.Helpful Reply -
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Ros8225889 on Dec 03, 2016
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Sandra Hellewell on Dec 06, 2016
TSP stands for trisodium phosphate.








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Ros8225889 on Dec 07, 2016

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