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George - could you please explain further?
By:Bob Marr
Date: 1/7/1999, 8:18 am


> The colder the environment the more water vapor that will condense on the
> epoxy before it cures.

Isn't the flucuation in ambient temperature the important factor? If I have the boat sitting out on a humid 90 degree day it will collect an enormous amount of moisture that evening as the temperature falls below the dew point. If the boat is sitting in an even 50 degree basement, why will moisture tend to condense on it? Even as the epoxy cools, it won't fall below the ambient temperature.

> IN GENERAL, the heat deflection temperature appears to be about 30 degrees
> above the cure temperature. So after curing at 40 degrees your boat will
> be soft for some period of time at 80 degrees (at most a week or so).

What is heat deflection? Does this mean that the chemical reaction of the epoxy kicks off again when the temperature rises?

Incidentally, MAS publishes the differences in cured strength, etc. between it's winter-cure and regular catalysts; I can't remember if the info is on their web site or in a brochure I have.

Thanks.

Messages In This Thread

George - could you please explain further?
Bob Marr -- 1/7/1999, 8:18 am