Host Dennis Pivin speaks with Kaleel Rahaim, Principal Engineer at CIPP Consulting and PhD candidate at Mississippi State, about the science behind cured-in-place pipe (CIPP) resin systems. They break down the chemistry of thermoset resins—polyester, vinyl ester, and epoxy—and explain why styrene is used, how alternatives are evolving, and what safety factors matter most. This conversation provides a clear, accessible look into the materials that shape modern trenchless infrastructure.