What is the difference between the 300/21 and 300/11 epoxy?
300/11 is primarily used as an adhesive between structural components. It is an old school epoxy that is thick, 3000 cps, and is susceptible to blush (only when the humidity is very high) which makes it less desirable for lay-up work. 300/21 is a thin liquid, 600cps, clear non-blushing epoxy that is perfect for laminating, lay-up, and adhesive applications.
