Frequently Asked Questions
We have questions and answers to help you decode the terminology and the fundamentals of mouldmaking and casting.
- What colours and finishes are possible with FMG? A variety of colours and finishes can be incorporated into the FMG face mix. UV stable liquid or dry powder pigments can be added to FMG to provide a vast range of colours. Aggregates can be added to the face mix to achieve desired texture effects when sandblasted and sealed. Metal powders can ...
- What are the set, demoulding and curing times for FMG? Set time is the time when the slurry loses workability and begins to stiffen and set - also referred to as working time. Using a typical alpha product formulated for this process, set time will be 20-30 minutes. Set time can be shortened with accelerators or lengthened with retarders. Without ...
- What type of glass fibre is used in FMG? Continuous strand veils, commonly used in GRG, are also most often used in FMG for architectural ornamentation. Standard E-glass fibre used in FRP can also be used in the form of chopped strands, chopped strand mat or continuous strand mat. A minimum of 5% by weight of glass fibre should be used ...
- Can I use any gypsum plaster for FMG? While VF-812 will improve the properties of most gypsum plasters, FMG requires the use of alpha hemi-hydrate plasters formulated for a low water/gypsum ratio. Most commonly used in the US is Hydrocal® FGR-95 from USG, which is specially formulated for architectural ornamentation. Also used are ...
- What is FMG? 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 fibre. FMG is the first technology to make gypsum an exterior product, when painted or sealed. It's a ...