How to Darken Concrete

Give a concrete floor in your home or garage or a patio floor a new look by applying concrete stain to the surface. The stained surface will remain attractive and looking like new for a long time, while concrete paints can crack over time. You can stain any concrete floors, as long as they have not been previously treated with concrete sealer. Clean and repair the concrete, and then apply the stain to darken and colour. Have a second person on hand to help you with the project, and you will have an attractive and protected concrete floor with only a couple of days work.

Clean the concrete floor or patio thoroughly, using a wire brush for caked-in dirt and sweepng up all dirt and debris with a heavy-duty broom. Use a shop vacuum to clean dirt from corners of the room.

Cut pieces of a dropcloth from 24 to 36 inches wide with scissors and tape it around the bottom edge of your walls and doors. The plastic will protect the walls and doors from stain splashing. Tape the pieces of plastic to the wall using painter's tape.

Mix your concrete acid stain in a bucket according to the manufacturer's instructions.

Pour your stain into the paint sprayer, following the manufacturer's instructions.

Begin spraying in a back corner of the concrete area. Spray a thin layer of the stain in the area. Have a second person run a broom over the sprayed area to brush it into the concrete. Spray over the scrubbed area again for a second coat. Spray entire lengths of the surface at a time, spraying in one direction, then back in the opposite direction for the second line of spray. No drying time is necessary between the first and second spray coat. The second coat will cover the brush marks from the broom. Allow the stain to dry according to the manufacturer's instructions.

Clean the floor with a mixture of half baking soda and half water. Read the instructions on the stain bottle for the exact drying time before doing this. Mop the mixture on the floor to stop the reaction of the acid stain. Allow drying overnight.

Pour acrylic floor sealer into a paint tray; roll the paint roller in the tray, then roll the sealer onto the floor, using a paint roller with a long handle. Roll a thin layer of the sealer across the entire surface, repeating to add a second coat. Allow drying according to sealer instructions.

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