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Re: Rust converter by Quest Chemical
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Posted by Rod (NH) on June 17, 2007 at 16:03:22 from (64.140.200.138):
In Reply to: Re: Rust converter by Quest Chemical posted by john_bud on June 17, 2007 at 05:13:55:
John, I've never tried any of the DuPont epoxy primers, automotive or industrial, even though I sometimes use DuPont's Centari as a topcoat. I am a firm believer in epoxy primer however, and got started with it years ago using PPG's DP. In recent years I have moved to PPG's OMNI MP170 epoxy primer as a more cost-effective product than the DP (now the lead-free DPLF) and have been very pleased with that, as I always was with the DP. I haven't seen any epoxy primer being promoted, rightly or wrongly, as a "rust paint" like the POR15 and some others. Epoxy is a different animal than a moisture-cured urethane, but it is basically impervious to moisture. I don't think epoxy in general is as "tough" or as abrasion resistant as the POR15 appears to be, but it's safer to use since most epoxies do not require isocyanate-containing additives. I've wondered how epoxy would perform as a "rust paint/rust encapsulator" by being applied directly to a sound, rusty surface. I just haven't seen any studies or evaluations addressing that specific use of it and have no experience in trying it that way. Rod
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