Bill ask the DI team about detailing a car in direct sunlight.

Dear Pro,

You recommend avoiding “sunlight” or “direct sunlight” when using many of your products. Are you trying to avoid surface heating or exposure to the some particular wavelengths (contained in solar radiation) that might adversely affect the product?

Many thanks,

Bill

Hello Bill,

I’m assuming the products you’re referring to are our polishes and waxes/sealants. Although working in direct sunlight is not recommended, it can be done as long as the surface temperature of the panel is cool to the touch. This is something many mobile detailers face on a daily basis, especially in the summer months. The problem occurs when the surface temperature of the panels becomes too hot. The carrier oils in compounds and polishes tend to flash very quickly, which results in poor performance and clumping or sticking of the product. If you absolutely must detail a car in the sun on a hot summer day, I strongly suggest completing your polishing and waxing in the early morning or late evening hours when the sun is low in the sky. You could also purchase a portable tent or try to position the car where part or all of the vehicle is shaded by some sort of structure.

Also, even if a products label states it can be used in direct sunlight, you can bet it will always perform better when in the shade. A good rule of thumb you can use is, when the panel becomes so hot that you can’t place you hand on it, it is best not attempt to use any product on it either.

Hope this helps! If you or anybody else has additional comments or questions on this subject, please submit your reply in the comment box below.