Choosing the Wrong Release Agent Creates Concrete Bug Holes
(This blog post comes from a YouTube video that illustrates how the selection of concrete form release affects the production of concrete bug holes. Many questions in the comment section ask what the two release agents were. We can guarantee that all Hill and Griffith products are engineered to reduce the formation of bug holes by using reactive fatty acid/methyl esters that react with free lime on the surface of the casting.)
From Paolo Redaelli, "Effects of two releasing agents of the surface of a properly vibrated concrete. Please note the one on the left having a perfect surface after very few seconds while the one on the right keeps forming bubbles of air."