Well shit, I have never heard of that. How does one tell of their antifreeze has silicates in it?
Again, do a search. Several brands have been noted in threads as to what type they are, but if you want to find out about a particular product that you don't find mentioned, it is best to go to the mfg web site. Any reputable mfg will list what type it is there.
There are silicate based (NO!), OAT (Organic Acid Technology) which is what Kawi AlumaCool is but Kawi uses a rarely used OAT ingredient, Hybrid OAT (another NO!) which is OAT with a small amount of silicates, and DexCool, which is a special type of OAT. Some people have used DexCool formulations without issue, but I don't trust them.
Some say if they are OAT (see below) or DexCool on the label. If they are primarily silicate based, it should say so on the label. Hybrid OAT products do not always state that's what they are on the labels.
Do not select a coolant based on color. There is no standard for type by color. Some mfg do use color to indicate certain types, but you should not trust color to determine the type.
Any purely OAT coolant should be OK.