Fibreglass resin vs casting resin
So I'm in Bunnings today, killing time while the missus is at a meeting, and tried to checkout their casting resin vs fibreglass resin, which was 20% cheaper for the same pot size. It's Diggers brand, so looking at their web site, this is what I found.
Fibreglass Resin
Unsaturated polyester resin (non hazardous) (45 -75%)
Styrene (24 -54%)
Methyl methacrylate (1-8)
Clear Casting Resin
Polyester resin (30-60%)
Stryrene (30-60%)
Additives (1-9%)
Other solvents in very low proportions (1-9%)
Given there's some wide variations in the percentages, and they specify the same level and type of catalyst, I reckon they're pretty much interchangeable, aren't they?
The only thing I don't know if if the Fibreglass resin is clear, which may be the sticking point. It may be some murky colour which may or may not be able to be tinted, but would be no use for embedding actual items in that you wanted to see through the resin. Anyone used Fibreglass Resin that knows, or can see any other reason it couldn't be used instead of the clear casting resin?
Thanks. Russell.
*EDIT*
Just found this info as well for Fibreglass
• Wax has been added to the resin to
stop the fumes entering the
atmosphere.
• A pale amber liquid with an aromatic
odour.
Not sure what that may mean for the end result though.