: I am using MAS epoxy that came with my CLC kit. It will be two
: years since I got the kit.
: The MAS site says the hardener last at least one year in a sealed
: bottle.
: I have not had any problems so far.

: Are there any noticeable indicators the epoxy is too old to use?

: Or does the boat just fall apart on the front face of a really big
: wave?

If it sets up, then it won't fall apart. It may not be as strong as fresh stuff, but you would be splitting hairs to tell the difference. It is still plenty strong, and stronger than you need.

If the hardener and epoxy base are good then they will react chemically and harden into the familiar epoxy plastic. If they are shot, then either it won't harden, or it has already hardened and you won't be able to get it out of the bottle.

Resins which have been frzen or stored in very cold conditions may start to drop out of solution, and you may see a lot of junk at the bottom of the bottles. This can be very easily reversed by soaking the bottle of resin (or hardener) in hot tap water for a while to get it good and hot, then shaking the bottle to redissolve the precipitate. If you are concerned with appearance, let it rest a day so the bubbles rise and disappear before using the stuff.

Hope ths helps

PGJ