An economical pure silicone urethane release formulated for difficult MDI.  Nix Stix DP-200 can be applied directly or can be diluted in popular solvents.  For optimum efficiency, DP-200 should be diluted with solvent prior to application to molds.  This helps insure that over application of release agent is avoided.  Recommended application methods include brushing, swabbing, spraying and dipping.