Mark Phillips in TN
Joined: 10 Jan 2006
Posts: 431
Location: Columbia, TN
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 Posted: Tue Jul 04, 2006 4:31 am Post subject: Marhyde reformulation? |
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Howdy folks-
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Have any of you other Marhyde #5111 (spray) or #5112 (quart) users out there seen a change in this stuff's quality over the last year or so?� A buddy building a Mustang II has been using it and it does not seem to stick to properly-prepped aluminum anywhere near as well as when I used it to build my plane.� You can scratch it off the surface with a thumbnail pretty easily.� It was tough stuff on my project and about the only way I could get it off was to sand it off!� See:
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http://websites.expercraft.com/n51pw/index.php?q=log_entry&log_id=4863
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I sent an inquiry to Bondo Corp's Tech assistance several weeks ago and the respondent asked for batch #s which were forwarded.� I haven't heard back yet.� He claimed there has been no change in formulation.� If so, their QC has some serious problems, but I really think they've changed it (even smells a little different).� Although my own experience with it was excellent, I need a substitue immediately.� Discussion over the years on the RV-list points to other self-etch primers, namely SW GPB988, SEM 39683 and Dupont A-4115S, which I believe is also the same as NAPA 7020.� If you are presently using one of these and are satisfied they bond well to aluminum, please let me know!
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I most respectfully ask that you PLEASE do not respond to this message with your concerns & opinions about using self-etch primers (unless you have specific FACTS about new EPA regulations or some other factor that has castrated ALL of these products!)� If you want to do that, contact me�OFF LIST�and spare thousands of listers the annoyance of wearing out their DEL key.� I have been on this list for many years and have heard it ALL about etch/alodine/epoxy/wash primer/whatever and am looking for hard information regarding the current crop of self-etch primers specifically.� The last thing we have time for is an argument over primers- it's already archived, again&again&again&again..........
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Thanks!
Mark Phillips
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