What material is often used in encapsulants for lead control?

Liquid coating is commonly used as an encapsulant for lead control because it provides a seamless and protective barrier over lead-based paint or contaminated surfaces. This material is designed to adhere strongly to surfaces, creating a waterproof layer that minimizes the risk of lead dust or deteriorating paint becoming a hazard.

Encapsulants like liquid coatings are specifically formulated to not only contain lead but also to prevent its exposure by blocking its leaching and peeling. They can be applied in various settings, including residential homes, and are particularly advantageous in situations where lead removal is not feasible or practical.

The other options, such as plywood, glass, and sand, do not serve the same purpose or effectiveness in controlling lead hazards. Plywood could potentially cover surfaces but would not properly encapsulate lead, while glass and sand are unsuitable materials for creating a barrier against lead exposure. Therefore, liquid coating is the most appropriate choice for encapsulants in lead risk management.