FOAMCAST 100 Foam is a backup insulation system for refractories, used in applications like casting tables, launders, filter bowls, and degassers. Available as a kit with a dry powder and liquid activator, it helps secure primary refractory, minimizing cracks. The foam is non-wetting to molten aluminum, preventing penetration and protecting steel. This silica-based foam expands to twice its original volume when activated, filling gaps and hardening into a solid material.