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Old 07-27-2004, 01:47 PM   #15
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Don't mean to start but.

At Home Depot I found "aluminum silicon clauking". Now I don't mean to get you know who all fired up but if this solves the ugly black dirt issue should it be considered at least for testing. Could use it in approved areas like window hinges. It is designed for flashing and rain gutters I think.
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Old 07-27-2004, 02:38 PM   #16
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Order Received.

The order came today from Austin Hardware. I guess they would be reliable. Silkaflex 221 is $5.47 a tube. That's 3 bucks a tube cheaper than anyplace I have found.

Here is a link: http://www.austinhardware.com/produc...478&pf_id=3243

They also have many other items that can be of use on an AS.
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Old 07-27-2004, 02:39 PM   #17
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Quote:
Originally Posted by JohnG
I ordered from them Friday last week. I certainly hope they are reliable. I know they have Sikaflex for $5.47 a tube
I'll post when I receive my order.
Vulkem is $5.95 cents at www.Airstreamdreams.com They have outstanding service. Not worth saving 52cents a tube to find out if they provide decent service when I know I will get decent service from AD's. They sell the 636 that is smooth. I have had wonderfull luck with the stuff.
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Old 07-27-2004, 02:56 PM   #18
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Quote:
Originally Posted by 59toaster
Vulkem is $5.95 cents at www.Airstreamdreams.com They have outstanding service. Not worth saving 52cents a tube to find out if they provide decent service when I know I will get decent service from AD's. They sell the 636 that is smooth. I have had wonderfull luck with the stuff.
52 cents a tube can stack up fast. I juist ordered 12 tubes of Sikaflex 221 which replaced Vulkem 636 and as Andy said from Inland RV, "Airstream production "HAS" changed from Vulkem sealer to "SIKAFLEX." So I saved over 3 bucks there besides having what is suppose to be a better product. However, they appear very simular by their qualities.

Quote:
Originally Posted by markdoane
All I can tell you is:
Elongation
Sikaflex 1a = 500%
Vulkem 636 = 400%

Adhesion on aluminum
Sikaflex 1a = 3.4 N/mm
Vulkem 636 = 3.5 N/mm

Tensile stress
Sikaflex 1a = 1.37MPa
Vulkem 636 = 1.37 MPa

Shore A hardness
Sikaflex 1a = 35 to 45
Vulkem 636 = 25 to 30

And the price seems to be similar.
Sikaflex is approved by Canadian Food Inspection Agency, whereas Vulkem 636 is approved by USDA. In case you want to eat off it.
Above quote from thread http://www.airforums.com/forum...ead.php?t=9659
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Old 07-27-2004, 03:13 PM   #19
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Did a liitle research on Sikaflex 221 and posted it along with the comparason that was done by Markdoane in my above post.

Elongation
Sikaflex 221 = 600%
Sikaflex 1a = 500%
Vulkem 636 = 400%

Adhesion on aluminum
Sikaflex 221 = 0% adhesion loss
Sikaflex 1a = 3.4 N/mm
Vulkem 636 = 3.5 N/mm

Tensile stress
Sikaflex 221 = Stress N/A Tensile Strength = 260 psi
Sikaflex 1a = 1.37MPa
Vulkem 636 = 1.37 MPa

Shore A hardness
Sikaflex 221 = 40 Approximate
Sikaflex 1a = 35 to 45
Vulkem 636 = 25 to 30

The stats can be found at http://www.sikaindustry.com/tds-ipd-sf221-ind-us.pdf on a pdf file
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Old 07-27-2004, 03:15 PM   #20
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Quote:
Originally Posted by 59toaster
Vulkem is $5.95 cents at www.Airstreamdreams.com They have outstanding service. Not worth saving 52cents a tube to find out if they provide decent service when I know I will get decent service from AD's. They sell the 636 that is smooth. I have had wonderfull luck with the stuff.
Eric,
I think everyone wants to switch to Sikaflex 221. If it's good enough for the factory. . . . . . . .and cheaper too!
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Old 07-27-2004, 04:28 PM   #21
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Quote:
Originally Posted by JohnG
52 cents a tube can stack up fast. I juist ordered 12 tubes of Sikaflex 221 which replaced Vulkem 636 and as Andy said from Inland RV, "Airstream production "HAS" changed from Vulkem sealer to "SIKAFLEX." So I saved over 3 bucks there besides having what is suppose to be a better product. However, they appear very simular by their qualities.

Above quote from thread http://www.airforums.com/forum...ead.php?t=9659
12 tubes? How big is a tube? is it a standard calk tube?

I just did a shell off and I bought 5 tubes of Vulkem. sealed the perimiter when I put the shell on. I have redone several seams on the roof.most of the gutters. I still have 1.25 tubes left. I should have plenty to replace my windows (the frames) in a couple weeks.
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Old 07-27-2004, 09:06 PM   #22
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I have a cargo trailer (Enclosed Car Carrier) and thought that I would go ahead and seal it with Sikafflex too. Hope I have enough. If I have some left over that is a good thing too as you never know when you may need some and it has a shelf life of 12 months.
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