Red Seal Concrete Finisher Practice Exam

What is the purpose of a concrete sealer?

1. To enhance color

2. To protect the concrete surface from water and chemical damage

3. To make the surface smoother

4. To aid in curing

The correct answer is: To protect the concrete surface from water and chemical damage

The purpose of a concrete sealer primarily revolves around its capability to protect the concrete surface from water and chemical damage. Sealers form a protective layer that prevents moisture penetration, which can lead to problems such as cracking, spalling, and the growth of mold or mildew if water is allowed to permeate the concrete. Additionally, sealers guard against harmful chemicals, including those found in de-icing salts, oil spills, and other corrosive substances that can deteriorate concrete over time. By providing this layer of protection, sealers significantly extend the lifespan of concrete surfaces and maintain their structural integrity. While other options touch on various qualities related to concrete treatment, enhancing color and making the surface smoother are aspects of different products or processes that focus more on aesthetics or finish rather than the protective function of sealers. Similarly, aiding in curing pertains to processes that help achieve the optimal hydration and strength development of freshly poured concrete rather than its long-term preservation.