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How to acid wash your concete or garage floor

Home » Decoration Materials » Acid stain concrete »

Hiring a professional to acid wash your concrete or garage floor can be quite expensive; moreover, it is really a job you can do yourself. If you want to clean your garage of oil spills or lay down a coat of stain, acid washing your floor is the best first step to a great finished project. Follow these easy steps to acid wash your concrete or garage floor.

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Step 1 – Clean Surface

In order to achieve the perfect finished project, you must first clean the floor which you plan to acid wash. Remove everything from the surface and sweep away the dirt. Hose the surface in order to remove any tough particles. If there are any oil stains on the floor (or other stains) then remove them with the proper cleaner. When you are done cleaning with chemicals, it is always a good idea to rinse the floor one last time with water.

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Step 2 – Create a Barrier

If you are planning to acid wash near asphalt, drywall, or tarmac, then it is important to create a barrier. The acid that you are going to use can damage any of these materials. You can use a tarp, plywood, or stones in order to block the flow of acid and water.

Step 3 – Mixing the Muriatic Acid

The acid will be mixed directly in the plastic watering can. The standard ratio is 1 part muriatic acid to 4 parts water. You can increase the strength of the acid mixture to 1 part acid to 2 parts water. Make certain you are mixing acid to water and not water in to acid, as the mixture can become volatile.

Step 4 – Applying the Acid

Before you can apply the acid wash to the flooring, you have to first lay a layer of water. Spray the floor with water until it’s completely wet. Use the push broom to brush away the water, as you don’t want puddles of water. The surface just has to be covered with a thin layer.

You can now put on the protective gear and walk around the wet floor with the watering can, applying the acid and water mixture. The water should bubble and be yellow in color. If it is not yellow, then the surface is sealed and you will have to remove the sealant before acid washing the floor. Use the broom to push the water and acid mix around the floor. When the bubbling has stopped, you can dump the ammonia onto the floor in order to to neutralize the acid.

Step 5 – Finishing Up

It is now time to finish the acid washing of the floor by rinsing away the chemicals with pure water. Allow the surface to dry prior to applying any coating.

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