FORMULA FIVE® Mold Sealer is a high durability semi-permanent base coat designed for use on composite, glass, aluminum and steel mold or plug substrates. Seals the mold surface and fills micro-porosity to create a smooth high gloss surface. Recommended for most molding processes including contact molding, hand lay up, spray up, cast polymer and closed molding. Particularly recommended for use in new composite mold initialization, sealing reconditioned or repaired areas of previously seasoned molds, and as a base coat to optimize performance of semi-permanent top coats. Also recommended as a mold sealer with sacrificial mold release systems such as wax, polymeric, spray or wipe on slip coat mold releases. Wipe on or spray on and wipe off application. Recommended application temperature is 70°F (21°C); do not apply to hot molds over 350°F (177°C). Suitable for process temperatures up to 500°F (260°C).