What type of coatings are known for their superior moisture and chemical resistance, often used below grade?

Coal tar coatings are recognized for their exceptional moisture and chemical resistance, which makes them particularly suitable for below-grade applications. These coatings are typically used in environments that are exposed to water, soil, and other potentially corrosive substances. The tar composition provides a robust barrier that effectively prevents water infiltration and protects underlying structures like foundations, pipes, and tanks from moisture damage and chemical exposure.

In comparison, while other coating types such as polyurethanes and acrylics also offer an array of protective qualities, they may not match the specific moisture and chemical resistance characteristics of coal tar coatings, especially in heavy-duty situations like subterranean installations. Polyurethane coatings are highly durable and flexible, making them ideal for various surfaces, but their use is often geared more towards above-grade applications or where flexibility is required rather than extreme moisture conditions. Acrylic coatings and latex paints are more suitable for exterior applications and typical atmospheric conditions but do not provide the same level of protection against the unique challenges associated with below-grade environments.