• All Mold Surfaces


  • Solvent Based
  • Easy Application
  • Eliminates Mold Porosity
  • Fast Curing
  • High Gloss
  • Seals New Molds

McLube Mold Sealer


Sealer for fiberglass reinforced polyester, epoxy and all types of composite molds. Can be used on new or green molds as well as for sealing or conditioning old molds. Will eliminate surface defects and porosity.

Technical Data:

  • Color and appearance................Clear Liquid
  • Dispersing medium.....................Heptane
  • Specific gravity............................0.7
  • Weight per gallon (lbs.)..............5.8

Application Method:

  • The surface to be coated should be clean and free from grease, oil, dirt and particularly all traces of prior release agents.
  • A solvent cleaner such as McLube Mold Cleaner can be used.
  • McLube Mold Sealer is intended for use as received. Any conventional method can be used for application - spraying, dipping, wiping or brushing. On a fresh mold apply three coats. Coatings should be thin and even. Allow to dry approximately 15 minutes between coats.

Safety and Handling:

  • The Material Safety Data Sheet for McLube Mold Sealer should be reviewed before using the product.
  • The precautions to be observed in handling McLube Mold Sealer are those related to the solvent heptane in the product. The solvent is flammable, and thus, the product should be kept away from heat, sparks and flames. Use only with adequate ventilation,especially in enclosed areas. Safety glasses and gloves are recommended when using this product.


Gallon Container, 5 Gallon Pail, 55 Gallon Drum.


For expert technical assistance in selecting the optimum product to meet your specific requirements and to be convinced of the benefits of McLube lubricant coatings, we recommend you evaluate the appropriate product under your specific conditions. Samples and technical assistance are available, as well as custom formulations that suggest themselves for a specific application.