How to Make Concrete Sealer from Linseed Oil

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It's not hard to make and use a linseed oil solution to seal your concrete driveway or sidewalk -- some people prefer this homemade brew to store-bought sealers for protection from winter damage. But be sure to take some important precautions. First, call your air pollution control district to ask whether it's legal to use a linseed sealer. If it is legal, be very careful when you use it -- linseed oil is extremely flammable.

Things You'll Need

  • Boiled linseed oil
  • Kerosene or paint thinner
  • Bucket
  • Roller, brush or hand pump sprayer
  • Ready-made linseed sealer

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Make sure the concrete is completely dry. Before you seal it, wait at least two days after the last rain.

In a bucket, mix one part boiled linseed oil to one part kerosene or paint thinner. Be sure the work area is well-ventilated.

If you don't want to make your own sealer, buy a ready-made treatment product that contains linseed oil plus solvents. See Resources below.

Use a paintbrush, roller or hand pump sprayer. Apply evenly and lightly -- if you apply too thick a layer, it will darken the concrete.

Let the area dry thoroughly before using it.

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