Abstract: The present invention provides a method for forming a coherent vermiculite film which can be performed on a continuous basis. An exemplary method comprises the steps of providing a non-flocculated dispersion of delaminated vermiculite platelets, providing a flexible release carrier having a surface operative for retaining thereupon a wet film of said dispersion and further operative for releasing the vermiculite film when dried, applying a wet vermiculite film to the moving carrier, and drying the vermiculite film, whereby the dried film is releasable from the carrier. The flexible release carrier preferably comprises paper having a release agent coating thereon. The invention also provides a flexible carrier-supported releasable vermiculite film, a film made from an vermiculite-aziridine composition, a composition of vermiculite and an aziridine, and a composition of vermiculite and amine resulting from an aziridine.