Many mold making and casting projects require the use of an appropriate sealer and/or release agent. In the realm of mold making and casting, these two products are broadly defined as follows:
Sealer- a material that seals small pores/holes so that liquid mold material cannot penetrate the surface. Sealers fall into three general categories: permanent, semi-permanent and removable.
Release Agent– a coating that is applied to prevent liquid rubbers and resins from sticking to surfaces. Release agents can be categorized into two general categories: those used for mold making and those used for casting (one release agent can be used for both purposes in some instances).
View the information below to learn about release agent and sealer options for your project:
https://www.polytek.com/tutorial/selection-guide-sealers-release-agents-mold-making-casting