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  1. 03-08-2014 #11
    Ger21's Avatar
    Lives in Detroit, United States.
    Ger21
    Last Activity: 24-07-2022 Has been a member for 9-10 years. Has a total post count of 651. Received thanks 90 times, giving thanks to others 0 times. Referred 1 members to the community.
    Quote Originally Posted by charlieuk View Post
    depends exactly on the epoxy but yes especially in warm temps, if you left a cup of epoxy to cure on its own you would be surprised how much smoke it can make! its a exothermic reaction so when if heat starts to build its a chain reaction and just gets hotter and hotter and will quickly turn into a smoking and bubbling mess. Ive never had flames but have heard of it. It all so doesn't make any different if you have some sort of filler mixed in with the epoxy so less actual resin to fill the space it will still have the same effect. As i said small quantities a bit at a time in a cold temp is your safest bet.
    You don't want to fill it with just epoxy, as that won't dampen anything. You want an epoxy-sand mix, with ~10-15% epoxy. You need a thin, slow setting epoxy to get enough working time. The sand will keep it from getting hot.

    I've mixed up a cup of epoxy sand, and it doesn't get hot at all. A cup of plain epoxy, on the other hand, will exotherm and get very hot in only a few minutes.
    Gerry
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