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Old 06-16-2013, 05:53 PM   #1
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Caulk caulk and more caulk

I have been reading about everything I can get my eyeballs on regarding caulk and not using silicone. With that said has anybody had any experience with GE Silicone ll for aluminum? Tried like hell to find a polyurithane based caulk at my local Lowes today and no luck. Everything they6 had here was an adhesive and not a caulk. Came across the GE Silicone ll for aluminum and metal. Claims it is for trailers among other things. Will set up in as little as three hours to rain. Adheres to most aluminum, stainless steel, granite, concrete, gutters and metal.
Designed for steel sheds, metal roofs, trailers and RV's. Can it hurt to try?
Woody
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Old 06-16-2013, 05:56 PM   #2
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Look for aluminum gutter seal in that area of the store. PERFECT stuff - even in small tubes for touch-ups.

Paula
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Old 06-16-2013, 06:04 PM   #3
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You can order Tempro 635 from Vintage Trailer Supply. I always have a couple of tubes on hand. The nice thing is you can put an opened tube in the freezer and it will keep until the next time you need it. I would stay away from Silicone of any type. JMO.
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Old 06-16-2013, 06:09 PM   #4
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Personally I find silicone very difficult to work with, nearly impossible to remove, and nothing wants to stick where it has been.

Airstream does not use it on their trailers, so neither do I. Their sealant products are listed in the Airstream Store website.

doug k
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Old 06-16-2013, 06:28 PM   #5
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SIKAFLEX 221 in grey. Airstream uses it on all newer trailers. One part polyurethane moisture cure. Will generally skin over in 30-60 minutes and cure in several hours.......the more humid the better!!!
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Old 06-16-2013, 06:33 PM   #6
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Do not use silicone. Try 3M 540 Polyurethane

This stuff is crazy good. Comes in black, white, Grey. I found it at "Tacoma Screw" which has branch in portland. You can probably order it online.

It is designed for trailers. when applying, make sure you have some paper to set this on, it is goopy and likes to drip, and dribble.

Clean your application well. Use Denatured alcohol to remove dirt, grease, etc.. Remove any and all silicone.

Here is their link. It is worth waiting a couple of days for.

Tacoma Screw Products, Inc.

Good Luck!

-tim
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Old 06-16-2013, 07:11 PM   #7
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You can order Tempro 635 from Vintage Trailer Supply.
Any Fastenal store can order you any amount of TremPro 535 and have it in a couple of days usually.

Actually, Frank Yensan (62Overlander) swears by TremPro 626, saying that is stays pliable a lot longer.

These are the historic Vulkem caulk, the one that Airstream used for very many years.

The only place on my trailer that Airstream says to use GE Silicon is to seal where the various parts of the plastic that make up the bathroom meet. That's it, that's all.
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Old 06-16-2013, 07:15 PM   #8
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If you must go to a big box, it seems they all carry LockTite polyurethene. It's a one part, similar if not identical to Trempro. It doesn't matter if it calls itself a sealant or adhesive, if it's a one part polyurathene, it's a one part polyurethene. You can find Sikaflex at almost any glass shop, it's pretty much what they use for window installation - at least the ones around here tell me that.
Tkasten - good information on storing it in the freezer. I'll give it a try.
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Old 06-16-2013, 08:24 PM   #9
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If you can't find it at the big box stores, call a local glazier. They use polyurethane sealants in their work and can probably supply you with what you need. Also Marinas, lots of aluminium boats in the world that use polyurethane sealants.
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Old 06-16-2013, 08:48 PM   #10
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Folks, there are over 2,000 Fastenal stores across the USA and Canada, all eager and willing to sell you TremPro in any of the model numbers it is available in. Some of them even stock it. Whenever I have needed it, it never took more than three business days for them to get it in if they didn't have it in stock.
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Old 06-17-2013, 05:19 AM   #11
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Thanks

Thank you one and all for your input. Really appreciated, Woody
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Old 06-17-2013, 08:19 AM   #12
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All fastenals are not the same. My husband even has a corporate account and they would not get us less the an 30 count case. I only needed 2-3 tubes. Really depends on the management.
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Old 06-17-2013, 08:25 AM   #13
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Quote:
Originally Posted by amazingwoody View Post
I have been reading about everything I can get my eyeballs on regarding caulk and not using silicone. With that said has anybody had any experience with GE Silicone ll for aluminum? Tried like hell to find a polyurithane based caulk at my local Lowes today and no luck. Everything they6 had here was an adhesive and not a caulk. Came across the GE Silicone ll for aluminum and metal. Claims it is for trailers among other things. Will set up in as little as three hours to rain. Adheres to most aluminum, stainless steel, granite, concrete, gutters and metal.
Designed for steel sheds, metal roofs, trailers and RV's. Can it hurt to try?
Woody
Before I tried GE Silicone II, I called GE.

They assured my that it would NOT harm aluminum.

That said, there are alternatives that have been suggested.

Good luck!
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Old 06-17-2013, 08:55 AM   #14
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Before I tried GE Silicone II, I called GE.

They assured my that it would NOT harm aluminum.

That said, there are alternatives that have been suggested.

Good luck!
It may not harm aluminum, but once you use it the silicone residue makes it all but impossible for anything else to stick. Not so much with the polyurethanes.

Aaron
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