A moisture barrier refers to a protective layer or material that prevents moisture or water from passing through. It acts as a barrier to keep things dry and protect against water damage. Full definition
Use this as a natural moisture barrier on baby's bottom, and for healing rashes. (greenmountaindiapers.com)
And it provides a strong, consistent seal to aluminum packaging, forming an excellent moisture barrier for a variety of snack applications. (dupont.com)
To use, apply a thin layer of balm and then follow with my homemade baby powder to create a protective moisture barrier. (mommypotamus.com)