What protective measure is required when applying penta to wood?

Using a sealer after applying penta to wood is an important protective measure because penta, or pentachlorophenol, is a toxic compound used in wood preservation. Applying a sealer helps to lock in the penta and prevent it from leaching out of the wood. This minimizes the risk of exposure to the harmful chemicals from the wood and protects the environment from potential contamination.

Additionally, sealing the surface enhances the wood's durability against moisture, fungi, and decay, ensuring the preservation treatment lasts longer. The process of sealing makes it safer for the end-user and ensures that the integrity of the wood remains intact while providing long-term protection.

While wearing gloves, applying only one coat of a finish, and storing the wood in a dry place are all important practices in handling and maintaining treated wood, they do not specifically address the need to contain the chemicals effectively after treatment. Sealing is thus a critical step to ensure both safety and effectiveness in wood preservation with penta.