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Underbody PVC Coating is...

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Old 06-12-20, 08:51 AM
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Underbody PVC Coating is...

i ran across this old bulletin in an old bulletin book, they tell you to repair with 3M 08531 https://multimedia.3m.com/mws/media/...aler-08531.pdf


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Old 06-12-20, 09:39 AM
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That is cool! So that is the stuff to use for those doing body work and wanting to get back to OEM appearance.

This is what my original paint FB looks like. Very nicely applied at the factory, must have been some guy and some masking tape..

On front fenders starting behind front wheels..rockers.. and wrapping around part of lower quarter.
Old 06-12-20, 11:01 AM
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yes, the original stuff has such a crisp line to it, it must have been taped off
Old 06-12-20, 05:16 PM
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Considering how old this application is (80s cars) I wonder if 3M still makes this stuff??
Great post!

Stu A
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Old 06-13-20, 09:13 AM
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Originally it was a waxoyl coating correct?
Old 06-13-20, 09:19 AM
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they do still make it https://www.3m.com/3M/en_US/company-...3194150&rt=rud

i am a little confused by the description, it seems more like the seam sealer that got used on the fender and headlight to body joints, but i guess we will see
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Old 06-13-20, 10:23 AM
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Originally Posted by t_g_farrell
Originally it was a waxoyl coating correct?
t_g I think Waxoyl, which is a brand of its own, was used as internal frame rust protection as an aftermarket product. Mazda used its own stuff, typically body frames tank-dipped prior to assembly, as well as certain frame panels underneath treated with proprietary coatings, according to period adverts. The 3M stuff here would cure to a 'firm' (with some flexibility? don't know.) finish to be just chip-resistant. I am not sure it had any rust-protective qualities per se. That would be left to what was previously applied to the metal s a coating underneath...

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Old 06-13-20, 10:27 AM
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Originally Posted by j9fd3s
they do still make it https://www.3m.com/3M/en_US/company-...3194150&rt=rud

i am a little confused by the description, it seems more like the seam sealer that got used on the fender and headlight to body joints, but i guess we will see
Agree J9 - this looks to be a sealing agent, not something spread externally on a panel for protection. I know there are Chip Guard-specific applications out there. If, on that rain-bow day, I were to ever refinish my lower panels, I would want to replicate this look per factory. Then prob protect IT with some sort of new-tech clear membrane coating that is the Big Deal these days....

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Old 06-14-20, 07:48 AM
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Have RX-7, will restore


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Thank you for sharing that!!! I've often wondered what the textured stuff was under the paint on the rockers and fenders!!
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