Exterior Painting Residential Painting

Using Oil Based Enamel Paint Outdoors

Posted on December 27, 2021

Exterior oil-based paint has long been the solution for protecting outdoor surfaces. Generally known as enamel, these paints are very durable, prevent rust and corrosion, and look great. In most instances, oil-based paint will have gloss sheen and can be sprayed, rolled, or brushed onto the surface. However, oil-based paints do have their downsides, so today we will discuss the common concerns of using oil-based paint outdoors.

Oil Based Paint is Usually Slow Drying

Oil-based paints tend to dry slowly, at least when compared to water-based paint. Most oil-based paints will require somewhere between 8-24 hours to dry, which can be a problem in inclement weather. This is because oil-based paints cure more quickly when the humidity is low and air circulation is high. Therefore, it is best to use oil-based paints outdoors at the start of a sunny day with little humidity and a small breeze. This will help prevent contaminants like insects and debris from getting stuck in the paint. There are faster drying versions available, but if you plan to work with oil-based paints, be sure to allow extra time for the paint to cure.

Oil Based Paint Requires Solvents For Cleaning

Cleaning oil-based paint from your tools can be a hassle. These paints require solvents such as turpentine, acetone, and mineral spirits for cleaning, which tends to make the project more involved than using water-based paints, like latex. This also applies to thinning oil-based paint, which is usually needed for the paint to be used in a sprayer. Depending on the job and tools used, cleaning the tools can use several quarts or even gallons of solvent, so it’s a good idea to budget a little extra for the project to cover these chemicals.

Oil-Based Paints Contain VOCs (Volatile Organic Compounds)

Oil-based paints no longer contain lead, which was removed from all paint products decades ago. However, they do still contain volatile organic compounds, which are typically emitted as fumes or gases and can be hazardous to humans. Short-term exposure can cause symptoms such as headache and nausea, while long-term exposure can result in kidney and liver damage. It is strongly advised to anyone working with oil-based paints to have good air ventilation or use a respirator, in addition to protective safety gear, like a face shield and gloves.