What is FMG?

Article courtesy of Smooth-On, Inc.

FMG is short for Forton Modified Gypsum or Forton MG. It is a unique combination of high-strength alpha hemi-hydrate gypsum with water based polymer chemistry that is reinforced with "E" glass fiber. FMG is the first technology to make gypsum an exterior product, when painted or sealed. It's a versatile, lightweight material that easily lends itself to many production techniques and can easily achieve a range of attractive architectural looks.


This FAQ article is offered as a guideline and offers possible solutions to problems encountered during mold making and casting. No warranty is implied and it is up to the end user to determine suitability for any specific application. Always refer to the provided Technical Bulletins (TB) & Safety Data Sheets (SDS) before using any material. A small scale test is suggested to determine suitability of any recommendation before trying on a larger scale for any application.