- Can I Paint Over Thompson's WaterSeal on Concrete?
- How to Paint Concrete Porches
- How to Remove Peeled Paint From Concrete
- How to Paint an Outdoor Concrete Fence
- How to Paint New Concrete
- How to Repaint a Concrete Patio
- How to Make Furniture Stripping Solution
- How to Clean Graffiti Off Concrete
- The Best Way to Paint a Concrete Floor
- How to Remove Old Paint From Concrete
- Is it Better to Paint Your Pool or Resurface?
- How to Paint on WonderBoard
You can paint concrete that's been treated with Thompson’s WaterSeal if you follow the proper steps. You should not paint over Thompson’s WaterSeal Advanced Clear, however. Proper preparation of the concrete and adequate drying times are required before you can start painting.
Applying Thompson’s WaterSeal
Apply Thompson’s WaterSeal to concrete that has cured at least 30 days. Apply the sealant only if the temperature is above 40 degrees and the surface can be protected from moisture, such as rain, for at least 24 hours. Allow the first coat to dry at least 48 hours and test to determine if a second coat is needed. Sprinkle a few drops of water on the concrete. If beads of water form on the concrete it is sealed. If the water is absorbed, producing a dark spot on the concrete, a second coat is required.
When to Paint
Apply oil-based paints to concrete treated with Thompson’s WaterSeal at least one week after the application of the sealant. Apply latex paints 45 days after the Thompson’s WaterSeal application. Follow label instructions from the paint manufacturer concerning application processes, temperatures and cleanup.
Monitoring the Product
Check the waterproof status of the painted surfaces about once a year. Place a few drops of water on the surface and monitor it for absorption. Beads of water on the surface indicate the concrete is still waterproofed.
Apply Thompson’s WaterSeal in a well-ventilated area and avoid breathing concentrated vapors or mist from sprayers. Wear proper eye protection and rubber gloves while applying the product. Use a paint thinner or mineral spirits for equipment cleanup. Rinse all equipment with clear running water after the initial cleaning.
Choose a sunny day to paint. First clean the concrete free of debris and dirt. Sweep it thoroughly. If there is a lot of dirt or spilled substances you may want to hose it down a few days before. If there are big cracks that you want to fill there is a caulk that is especially made for filling concrete. It is called Mortar or Concrete caulk. This will have a gritty feel to it. Do this step before painting.
Ready to paint. Start with using the paintbrush and just trimming out the edges where the roller cannot get. Then just pour some paint on the concrete and start rolling. Keep in mind this paint does dry quickly. make sure that the first coat is fairly thick. This type of paint is an oil based so it does roll on smooth but is hard to get off hands and clothes.
Repeat a second coat and let dry. When choosing a color, a darker shade will hide dirt much easier. Repeat this every year or two to keep a vibrant color.
Hook the pressure washer up to a hose and turn the water on following the specific directions for the pressure washer as they vary slightly from one model to the next.
Turn the pressure washer on. Some pressure washers are electric and must be plugged into an electrical outlet, while others are gas-powered and must be filled with fuel and started with a pull cord, similar to a push lawn mower.
Adjust the water spray to the lowest setting and move the wand of the pressure washer to direct the spray back and forth across the concrete as if you were applying paint to the concrete. If the paint does not come off, increase the pressure slowly until the paint is removed. Try to use the lowest pressure setting possible to remove the paint to avoid damaging the concrete.
Mix together three parts water with one part trisodium phosphate (TSP) in a bucket.
Put on rubber gloves and thoroughly scrub the concrete fence with a scrub brush, cleaning away any dirt and grime. Rinse the concrete fence with plain water and allow to air dry.
Fill any holes or cracks in the fence with concrete patch using a trowel to apply the patch and to smooth it flush with the surface. Let the patch dry according to the manufacturer's instructions.
Pour concrete primer into a pump sprayer and apply a coat of primer to the fence. Let the primer dry completely before continuing on to the paint.
Rinse the pump sprayer with mineral spirits, then water and let air dry. Add concrete paint to the sprayer and spray on the first coat of paint. Let the first coat dry between 3 and 4 hours, then apply a second coat of paint.
Brush a coat of concrete sealer onto the fence using a paintbrush once the second coat of paint has dried.
Clean the surface you'll be painting thoroughly. Oil and grease must be removed for the paint to adhere properly. Use a mop or scrub brush and the TSP solution to clean the surface of the concrete. After rinsing the concrete thoroughly, allow it to dry for several days.
Repair any cracks before painting new concrete. Use hydraulic cement or concrete patch for cracks and to smooth rough areas. Allow the patch to dry completely before proceeding.
Test the concrete for moisture and leaks. Tape plastic down over the entire surface to create an airtight seal. Leave the plastic overnight---if condensation has formed inside the plastic, you'll need to seal the concrete before moving on to the painting stage.
Once the concrete is sealed, apply primer and allow it to dry thoroughly.
Paint new concrete with a product specially formulated for use on concrete. Use a roller or paint sprayer to apply the paint in two to four thin coats, allowing each coat to dry before applying the next. Use a paintbrush to get into corners.
Allow the painted surface to dry completely before exposing it to moisture or walking on it.
Empty everything from the patio and sweep away any leaves, dust or other debris with the broom.
Mop the patio with TSP or another de-greaser. Use the scrub brush on any tough stains. Soak up oil spots with kitty litter, and then use the scrub brush and TSP to clean up any residue.
Remove old paint from a smaller patio (10' x 10' or so) by mixing 1 cup of dishwasher soap and 2 quarts of hot water. Pour the solution on a small section of painted concrete and allow it to stand for 10 to 15 minutes. Break up the paint with the wire brush and scrape it away with the scraper. Repeat by sections until all of the old paint is gone.
Remove old paint from a larger patio by using a concrete paint stripper, available at your local home improvement store.
Patch any cracks or holes in the concrete with cement filler. Allow it to set overnight.
Test to make sure your concrete is sufficiently well sealed to take paint by taping a 1' by 1' square of plastic wrap onto the concrete and leaving it overnight. If there is condensation beneath it in the morning, your concrete needs to be sealed before you can paint it. Contact the manufacturer to make sure your sealer is compatible with your primer and paint.
Use the roller to coat the concrete with primer. Use the brush to get into any little corners, or to edge the part near the house. Let it dry overnight.
Use a clean roller to apply a coat of paint over the primer. Cement color dries darker than it goes on, so don't fret if the initial coat looks light.
Add another coat of paint if you think the patio needs it.
Apply the sealer and make sure no one walks across the patio for at least 24 hours.
Mix one small container of powdered drain cleaner (lye) into one gallon of warm water in a plastic (not aluminum) bucket. Make sure you pour the lye into the water, not the other way around or it will bubble up and it could burn your skin.
Brush the solution onto the paint you're trying to remove with a medium-sized paintbrush. The solution needs to keep the paint saturated until it has a chance to break it down. Cover with plastic wrap or place in a plastic bag. Allow to sit for 15 to 45 minutes.
Scrape off the old paint with a putty knife. Put all of the scrapings into a plastic bucket. Do not empty the bucket into the trash, set aside for now. Brush on more stripper if needed in grooves and recessed areas of the wood piece. Use small implements, like tooth picks or bamboo skewers, to get into those tight spots and remove all the old paint.
Neutralize the paint stripper. Mix 2 cups white vinegar with one gallon of water. Use a clean paint brush to apply the solution to your newly stripped piece. Once the piece has been completely brushed with solution, allow it to air dry.
Pour the remaining vinegar solution into the plastic bucket that contains the paint residue you removed from the wood piece. Then pour in any leftover stripping solution. This will effectively neutralize the caustic lye in the paint stripping solution. Leave the bucket in a corner of your garage until all the liquid has evaporated, then discard the solids in the trash in a double plastic bag.
Prevent runoff by covering any nearby storm drains with absorbent mats.
Put on safety goggles and rubber gloves. Attach the water hose to a power washer. Hold a power washer 3 feet away from the graffiti and dampen the surface with low water pressure.
Pour a water-based paint stripper carefully into a plastic paint tray. Dip the bristles of a paintbrush in the paint tray and apply stripper over the graffiti as if you were applying paint. Allow the stripper 10 minutes to set.
Scrub the paint stripper into the graffiti with a scrub brush. Rinse the concrete clean with a power washer set on low water pressure.
Examine the concrete. Repeat steps 3 and 4 if any graffiti remains on the concrete.
Clear the floor of all removable objects.
Sweep the floor to remove debris and dirt.
Power wash the floor to provide a final cleaning. Let the floor dry completely before continuing.
Load the caulking gun with concrete caulk. Cut the tip of the tube at a 45-degree angle and fill cracks larger than 1/2 inch.
Smooth caulk with a putty knife and let dry for 4 hours before beginning the sealing process.
Fill a paint tray with concrete sealer and put on a single even coat of sealer with a paint roller. The sealer should dry for 24 hours before you prime the surface.
Next put on a single even coat of primer with a roller. Allow it to dry for 24 hours before applying paint.
Apply concrete paint with a roller. Wait 48 hours before using the surface.
Use the pressure washer to loosen the old paint from the concrete. Begin on a low setting and slowly raise the setting so as not to damage the concrete. Proceed to Step 2 if any paint remains on the concrete.
Open the container of mineral spirits. Pour a small amount on the paint stain. Use the wire brush to scrape away any remaining old paint from the concrete. Work quickly before the mineral spirits evaporate.
Sprinkle a small amount of dirt on the concrete to eliminate the light colored areas created by the pressure washer, mineral spirits and/or wire brush. Use your shoe or boot to massage the dirt into the concrete until the color is blended into a consistent balance with the rest of the concrete. (Skip this step if you plan to paint the concrete.)
Refinishing a plaster-surfaced pool is the most expensive way to restore a pool, but it is also the most preferred. This is a task for a qualified pool construction contractor.
Re-plastering is labor intensive; the old surface plaster is chiseled off down to the gunite base and new plaster is then reapplied. An optional, but popular and more durable upgrade is to apply a textured finish such as Pebble-sheen or Pebble-tec finishes.
Painting a pool surface to restore its appearance is also an option, but it is not as long-lasting as re-plastering. Types of surface paint are epoxy, chlorinated rubber, and water-based acrylic paints. Epoxy paint has the longest service life (7 to 10 years) while acrylic has the shortest (2 to 3 years).
Painting a pool can be a DIY task, if so inclined, but the key to the best result is in the surface preparation. Power-washing, acid washing, then rinsing thoroughly will typically be sufficient. The new finish can be easily rolled on, much as you would finish an interior wall of your home.
Costs will vary by area and market. Generally, refinishing with paint will be one-third to one-half the expense of re-plastering. Contact a pool builder for more information.
All finishes deteriorate over time. To get the longest life from your pool finish, be certain to keep your pool free from debris and keep the water chemistry in balance.
Mix concrete per manufacturer's recommendation for use in a concrete sprayer. This will usually require additional water.
Spray the WonderBoard with the concrete sprayer in a smooth, horizontal motion, covering the WonderBoard. Allow to dry for the recommended time.
Spray oxidized paint onto the dried concrete. The thicker oxidized paint will not allow for as much absorption.