The basics Mehron Castor Sealer to prepares cured latex caps and additional prosthetic appliances for cream makeup application. The benefits Formulated with Ricinus Communis (Castor) Seed Oil, Simmondsia Chinensis (Jojoba) Seed Oil. The uses Seals neatly and allows for creme makeups to be applied without discoloring, so there's no need for rubber mask grease. The bottom line An industry favorite!