Painting Concrete Window Sills ((exclusive)) -

Tape the glass and the wall siding. But leave a 1/16th inch gap between the tape and the concrete—this prevents paint from seeping under and creating a glue seal that peels later.

If you’re like most people, the answer is “never.” Until one day, the afternoon sun hits just right, and you see it: the peeling paint, the chalky gray concrete, and that weird greenish-black gunk in the corner. Suddenly, your whole house looks tired.

Apply one thin coat of masonry primer. Then two thin topcoats. Do not glob it on. Concrete hates thick paint. Wait 4 hours between coats. Aesthetic Tip: Go Dark Everyone buys white paint for sills. But consider a dark gray or charcoal. Why? White shows every speck of dirt, pollen, and bird dropping. A dark sill hides the grime and makes your window glass look like a bright, floating mirror. The Verdict Painting concrete window sills is a weekend afternoon project that delivers a “new house” feeling. Just remember: clean it, etch it, and use the right paint. Do that, and your sills will outlast your mortgage. painting concrete window sills

And how to do it so the paint actually sticks (for more than a week).

Now go outside and glare at your windows. I bet you can’t unsee the sills. 😉 Tape the glass and the wall siding

New, smooth concrete is too slick. You need to etch it. Use a liquid concrete etcher (muriatic acid alternative) or simply use a bonding primer made for masonry. This creates "teeth" for the paint to grab onto.

Let’s be honest. When was the last time you actually looked at your window sills? Suddenly, your whole house looks tired

Look for “100% acrylic latex” formulated for concrete, or better yet, a specialized elastodynamic paint that bridges hairline cracks. The 5-Step Process (Do Not Skip #2) Step 1: The Deep Clean You aren’t just wiping off dust. You are removing the "chalk." Mix TSP (trisodium phosphate) or a concrete cleaner with water. Scrub with a stiff brush. Hose it off. Let it dry for two sunny days.