OPM Termite Practice Exam

What is a feature of oilborne preservatives?

1. Waterproof and color

2. Safe for the environment

3. Unpaintable and water resistant

4. Easy to apply

The correct answer is: Unpaintable and water resistant

Oilborne preservatives have the characteristic of being unpaintable and water resistant due to their formulation. When these preservatives are applied to wood, they penetrate deeply into the material and create a barrier that repels water, providing excellent protection against moisture and subsequent decay. This water resistance is crucial in environments where wood is exposed to high humidity or direct contact with water. The unpaintable aspect arises because the oily nature of these preservatives does not provide a suitable surface for most traditional paints or finishes to adhere properly. Since the surface remains oily, it can lead to issues such as poor adhesion and peeling if paint is applied. Therefore, while they effectively protect the wood, once treated with oilborne preservatives, the wood often needs to be left in its natural state or finished with products specifically designed for compatibility with such treatments. In contrast, other options like being safe for the environment or easy to apply do not generally apply to oilborne preservatives, and while they may have some degree of waterproofing and color, these attributes are not the primary features that define them.