Help with older Dupont clear
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Hi Everyone..
I’ve lurked around here for a bit and have enjoyed some very useful posts. Thank you to all who contribute.
I have run into something that I can not find an answer.
I have a gallon of Dupont HC-7600S clear. The activator for it is of course garbage. The bad part is that this is a discontinued product and Dupont does not support it anymore. I tried to find out if there was an alternate low temp activator I could use but Dupont told me there was nothing available.
Frankly, I kinda find this a little hard to believe. I mean there has to be [b]something[/b] I can use as a substitute activator.
Any ideas?
Thanks,
MichaelWhat type of clear? Unfortunately I’m not familiar with that one… if its urethane there is a good chance a urethane hardener from another manufacturer will work with it. Good Luck! hope to hear how it turns out
[quote=”AllAmericanCollisionllc” post=24475]What type of clear? Unfortunately I’m not familiar with that one… if its urethane there is a good chance a urethane hardener from another manufacturer will work with it. Good Luck! hope to hear how it turns out[/quote]
It’s a urethane. I agree that a hardner from another manufacturer will probably work but the issue is which one? 🙁
I would also probably bet that one of dupont’s current activators would work too, but again, which one? Dupont is less than forthcoming with the information. Possibly because they don’t want to support an older product or more probable is that they don’t want to have any liability in case there are problems.
Michael
Will the paint harden with another hardener, probably. Will it last using the wrong hardener, its a toss up. If it was me I would take my loss on the clear vs having to redo a few jobs. If Dupont says they don’t have a hardener for it I would take their word.
[quote=”ryanbrown999″ post=24477]Will the paint harden with another hardener, probably. Will it last using the wrong hardener, its a toss up. If it was me I would take my loss on the clear vs having to redo a few jobs. If Dupont says they don’t have a hardener for it I would take their word.[/quote]
i totally agree with ya ryan why do people put hours an hours in a project an wont let go of a gallon of old clear i will never understand :chair :chairI’ve also got to agree. Yes you may get away with another hardener in it, but why take the risk?
And I have learnt the hard way. Many years ago I ran out of the correct hardener so used the first thing I could get my hands on for a front end rush job . All was well until a few months later when the clear started to yellow. I’d never had that problem before so I could only put it down to the random hardener I’d used.
For some reason the guy wasn’t too happy having a silver car with a gold front end :rofl
I pretty well agree with whats been said. If you can get in touch with a rep they might even trade you for a current clear. I’ve substituted hardeners in a pinch before without problems,but I’ve always contacted my rep first and he assured me of no issues and he’d cover it if a problem arose. The one time I didn’t I recall using a sherwin williams primer and I cocktailed two hardeners together (figuring if one didn’t kick it over the other might..lol)…well it didn’t work so well, came back peeling a few months later…lesson learned.
Its simply not worth spending countless man-hours fixing it to risk putting on a product that could fail (unless of course your rep would pay if it did). So unless someone can tell you they’ve used that exact product with a particular current hardener, which the odds are against, your likely gonna have to eat the cost of the clear, try and trade it or roll the dice.
When Dupont went to the HC7776 and G27779 “4to1” clears i had the same thing. We made the switch and the old clear hung around a few months till the hardener was no good. My Dupont rep told me then that the HC7776 was actually HC 7600, and the G27779 was actually 7900.(some running changes to ’em since 1st intro) The only thing they changed were the activators and that there was absolutely no problem using the “4 to 1” activators to use up the HC7600. I did it and never had a problem. If you’re leary of it use the clear up on the bottom of hoods, inside of doors, etc. I’d bet your clear has yellowed with age a little bit too so that may be best if you really want to use it up. My rep knows i’m tough on quality and redo is the worst of all 4 letter words, and he’ll always err on the side of caution if there’s a shadow of a doubt about a tech question, so i was confident when i used mine up…years ago now.
I recall the HC7600 was the same as one of the Nason clears too but don’t recall the number for absolute certain, so i won’t say it.No Worries. SPI said one of their hardeners would work fine
Throw it in the garbage, its not worth spraying anyway. :p
i sprayed quite a bit of that years ago. you really dont want to use that clear anyway. that stuff came out in the infancy of super fast curing clears so the technology in it sucks. its dries fast as hell but it also shrinks back like a mother.
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