What does tooling the caulk improve besides appearance?

Tooling the caulk primarily enhances the durability of the seal. When caulk is properly tooled, it creates a smooth and even surface, ensuring better adhesion to both surfaces it is sealing. This process helps eliminate air bubbles and gaps that could weaken the seal over time. A well-tooled caulk joint is more resistant to weather elements, movement, and expansion and contraction caused by temperature changes. This not only prolongs the life of the seal but also minimizes the likelihood of water infiltration or damage, which is crucial in maintaining the integrity of the surfaces being sealed.

While factors like color matching, cost-effectiveness, and environmental impact are important in a project, they are secondary considerations when it comes to the primary function of caulk, which is to create a lasting and effective seal. Tooling does not directly impact these aspects as effectively as it does the seal's durability.