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Question DetailsAsked on 1/25/2018

is it normal for there to be no color along the joint cuts of a new stamped concrete patio?

the patio was poured, joints were cut, and after the sealer was applied it was noticed that there is color missing along several long sections along the joint can this be rectified. the contractor is not answering.

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1 Answer


Common, but not as it should be.

There are two ways to do stained concrete - a shake-on powder or spray/ sponge/ brush/ roller applied stain, or mixing coloring powders/liquids into the concrete as it is mixed ans before placement. With the first any cuts, chips, etc that go deeper than the staining went will come up concrete colored. If the concrete is colored throughout the mix, then chips or cuts will still be colored - though typically will show a bit brighter color than the surrounding area till they fade. So - sounds like you have the surface stained option, which is a lot more common, especially for small jobs.

The color problem should have been noticed and corrected before the sealer was applied.

To fix it now - they would have to remove the sealer in the joint - easiest probably by recutting it or abrasively scour it just a hair deeper to remove the sealer, mix up a bit of stain and hand brush it into the joint, let dry, then reseal the joint.

If you have not given him final payment, send him written notice of the defect and stte4 he needs to correct it. If he does not reply, you could contact his bonding company - though they might laugh at this small a flaw they should still honor a claim, assuming you had some warranty. If no warranty and you have paid him, they may take that as implied approval - many bond coverages expire as soon as the contractor receives final payment if there is no written warranty, ,because technically the job is "complete" at that time.

DIY - using a tapered abrasive stone (about $5 at any place selling stone / tile working materials and tools) or if you are good at holding one true to line, a skil saw with concrete cutting abrasive blade set to just barely deepen the cut, remove the sealed concrete about 1/32 - 1/16" deep, then mix some stain with water to a water color painting consistency and use a small paint brush or parts brush to brush a covering coat into the crack, let totally dry, and seal. If first coat is not dark enough you can restain, so start with a thin wash of stain and go from there.

The stain commonly comes in 1# bags (WAYYYY nore than you need) or 1 pint to quart bottles for concrete stain, around 6-8 ounce bottles as tile grout stain. Sealer comes in bottles as small as about 4-6 ounces - for that purpose either concrete or tile grout sealer should work fine.

Be sure not to get any above the joint or it will make a visible difference - mask off the joints before painting in the stain, and remove the tape and immediately carefully damp sponge any residue off the surface before it can soak in. And be VERY careful about dumping or knocking over the stain container - if you do that about your only choice will be quickly restaining the entire surface (or at least that section) to make it look alike.

And of course, after all is said and done, sounds like an appropriate Review would be in order.

Answered 2 years ago by LCD

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