How to Tell the Difference Between Latex & Oil-Based Paint
- 1). Find out how you should use the paint. You thin latex paints with water and you can use them directly from the tub. The cleanup after painting is also easy, as this paint comes off with soap and water. Oil-based paints require a solvent as a thinner. You will also require turpentine or a similar cleaner when clearing up the mess.
- 2). Apply latex paint in an inconspicuous corner of your wall to find out what paint is on the wall. Latex paints will not hold over an already-set oil base.
- 3). Find out what kind of paint is on your wall by using acetone-based nail polish remover. Apply a small amount in a corner that will remain hidden. If the paint comes off, it is latex. Oil-based paints are not affected by acetone.
- 4). Look for cracks on your wall. If you have been repeatedly repainting your walls and you find cracks, it means you have been painting over an oil-based paint. Oil-based paints are very durable and dry to the point of extreme hardness. The paint continues to dry throughout its lifespan. Painting over an existing coat will only lead to cracks.
- 5). Look at the paint on wood surfaces. If the paint does not crack with all the expansion and contraction that the material goes through, then you are dealing with latex. The paint is porous and allows a surface to breathe.
- 6). Analyze the drying time for small test patches of paint. Latex paints dry fast. This, however, depends on how well-prepared the surface is and on ideal painting conditions.
- 7). Look at how stains show on the painted surface. Latex paints show stains much faster than oil paints. However, they are easier to clean.
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