Which type of respirator should not be used when spraying oil-based products?

The N respirator is designed for filtering non-oil-based particulates and is not suitable for use with oil-based products. This is due to its construction, which may become ineffective when exposed to oils; the filtering material can degrade, reducing the respirator's ability to protect the wearer.

In situations where oil is present, it is important to use respirators designed for such environments, such as those rated for oil-based particulates. Other options listed, such as the half-mask respirator, full-face respirator, and P100 respirator, can be suitable for use with oil-based products provided they are appropriately rated for such substances.