When does bond breaker need to be applied?

• A. 2 coats
• B. Prior to casting the slab
• C. Right angle
• D. After curing

Answer: (B)

Bond breaker acts as a release agent between the wall panel and the casting slab, allowing the panel to be lifted out without sticking to the slab. In tilt‑up construction, you pour the panel on a flat slab and later raise it into place, so preventing adhesion from the very start is essential. That means applying the bond breaker before the slab is cast, so a proper release layer exists on the surface as the concrete cures. If you wait until after curing, the surfaces may bond during initial set, making removal difficult or damaging to either surface. A single coat applied prior to pouring is typically sufficient to provide the needed release.