Which types of oils are known for penetrating wood fibers to seal and protect them from moisture?

Vegetable oils are well-regarded for their ability to penetrate wood fibers effectively, forming a protective barrier that helps seal the wood and guard against moisture. This characteristic is particularly important in woodworking and finishing applications, as preventing moisture intrusion is crucial for preserving the integrity of the wood.

Vegetable oils, such as linseed oil and tung oil, are often used in wood finishes because they can deeply soak into the grain of the wood, enhancing its durability and providing a natural sheen. Their natural composition allows them to polymerize when exposed to air, further strengthening the protective layer over time.

Other types of oils, while they may have certain properties beneficial for different applications, do not possess the same level of penetration and moisture protection that vegetable oils offer. For instance, mineral oils tend to create more of a surface film rather than penetrating deeply; synthetic oils may offer other benefits but typically do not have the traditional properties that allow for optimal wood protection; and animal fats, while they can provide some protective qualities, are not commonly used today due to issues such as rancidity and less effective penetration compared to vegetable oils.