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Re: PPG Omni Epoxy Primer Catalyst MP175
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Posted by B-maniac on July 18, 2006 at 20:43:20 from (207.241.134.249):
In Reply to: PPG Omni Epoxy Primer Catalyst MP175 posted by Ray A on July 18, 2006 at 19:21:33:
I agree with CNKS.I have used it after 9 mos with no problems. There is a difference between a catylist and a hardner.They are both a catylist by definition,but one CURES and cross-links and the other reacts and cross-links (175). This non-iso catylist reacts with the epoxy primer to promote a near perfect bond and in turn corrosion resistance and in turn a window of chemical cross-linking to the next product put over it.(within the system). It may have a curing property to it but that isn't the catylist's primary function in epoxy.You can let it set for a week mixed up in a sealed container without it setting up. BUT,it no longer has it's other properties anymore.Throw it out.On the tech sheet it should have a time limit for effective use.PPG's does.
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