Reply
 
Thread Tools Search this Thread Display Modes
 
Old 08-03-2012, 02:59 PM   #1
Rivet Master
 
Alphonse's Avatar

 
2010 28' Flying Cloud
Lower Alabama , USA
Join Date: Mar 2012
Posts: 649
Sikaflex 505UV in gray - where to get it?

As many of you know, the factory did use Sikaflex 721UV for the external sealant for the larger gaps, for example around the hot water heater access door. Sika stopped making 721 in gray and, as indicated here on the board in another post, 505 UV would be the recommended alternative by Sika.

Here is the issue, I can't find Sikaflex 505UV in gray anywhere in small quantities. The boat repair/hardware suppliers sell it in white but I want it in gray.

When 721UV was taken off the shelves, the AS factory changed to another product called Adseal and you can order that from the factory store. I tried to do a little research on the Adseal specs and availability and couldn't find enough information on it to satisfy me. It may be really good stuff but I have not been able to convince myself of that by searching the web.

So with this background, my two questions:
1. Has anyone found a supplier selling the Sikaflex 505UV in gray in quantities less than a box?
2. Has anyone found a good alternative to the Sikaflex 721UV or 505UV in the 3M line that may be more readily available?


Thanks for your help
__________________

__________________
Alphonse is offline   Reply With Quote
Old 08-03-2012, 04:53 PM   #2
2 Rivet Member
 
2008 25' Safari SS SE
Ocala , Florida
Join Date: Feb 2007
Posts: 32
I was researching this recently myself and TremPro 635 is the new Vulkem since the original Vulkem is not being made anymore. Vintage Trailer Supply has the Trempro 635 in small quantities. It' gray. Sikaflex 505 is white and in my case (2008 Safari with a whiite roof) was the appropriate sealant. I picked some up from the dealer since he is close but it's fairly well available. Hope this helps. There are a few threads on the subject from those far more familiar than I. Search Trempro and you should be enlightened.
__________________

__________________
TAC FL -29
http://airstreamtalesandtrails.blogspot.com
Pepthedog is offline   Reply With Quote
Old 08-03-2012, 05:00 PM   #3
Rivet Master
 
Alphonse's Avatar

 
2010 28' Flying Cloud
Lower Alabama , USA
Join Date: Mar 2012
Posts: 649
Quote:
Originally Posted by Pepthedog View Post
Sikaflex 505 is white and in my case (2008 Safari with a whiite roof) was the appropriate sealant. I picked some up from the dealer since he is close but it's fairly well available.
Pep, thanks for the insights on Vulkem.

Sikaflex 505 is actually made as a gray as well. The issue I have had is finding it available less than a box of 24 cartridges!

Al
__________________
Alphonse is offline   Reply With Quote
Old 08-03-2012, 06:04 PM   #4
Rivet Master
Commercial Member
 
lewster's Avatar
 
Vintage Kin Owner
Naples, FL , Hood River, OR
Join Date: Dec 2005
Posts: 7,279
SikaFlex 221 comes in grey (also black, white and colonial white) and is readily available in individual tubes. I have been using this for 7 years without a failure or cracking. You might consider this as well.
__________________
Lew Farber...ABYC Certified Master Marine Electrician...RVIA Certified Master Tech ...AM Solar Authorized Installation Center...AIRSTREAM Solar & Electrical Specialist...Micro Air 'Easy Start' Sales and Installations
lewster is offline   Reply With Quote
Old 08-04-2012, 09:41 AM   #5
Rivet Master
 
Alphonse's Avatar

 
2010 28' Flying Cloud
Lower Alabama , USA
Join Date: Mar 2012
Posts: 649
Thanks Lewster for sharing your experience with 221. That could be an acceptable solution but I would be cautious about putting it on top of 721 and will explain that a little more here.

In the way of a little more background I was told by a knowledgeable person that the Sika factory had told them 221 actually had some UV stabilizer in it. However I am assuming it does not have as much as the previous 721 formulation and the current 505 that carry the designation "UV". Earlier in my career, I managed a manufacturing site that made light stabilizers and antioxidant compounds. These specialty chemicals are quite complex and expensive to manufacture. Although the application dosing is typically low, it still adds significant expense to a final product to have them in the formulation in significant concentration.

I have tried to contact Sika without success to speak with them directly simply because I grew more curious about all this in my quest to find a replacement for 721. I also wanted to be sure to put the proper stuff on my AS considering that I likely couldn’t get all the 721 removed.

From the Sika specs:

1. 221 is a polyurethane
2. 721 UV was a silane terminated polymer. The 721 specs have a somewhat cryptic warning to not apply over curing urethanes. This seems to have to do with proper curing.
3. 505 UV is silane terminated polymer. Same warning on application in presence of curing urethanes.

My takeaways without the benefit of talking directly to Sika:

I. I am cautious about applying 221 on top of 721. While the 221 might be good, it quite likely doesn’t have the UV light stabilizer content that 721 had.
II. The 505 appears to be compatible with the 721 (same base material) and it has the UV designation.
III. 505 has a service temperature of up to 400F for short duration.

Therefore my quest to find Sikaflex 505 UV in gray!
__________________
Alphonse is offline   Reply With Quote
Old 08-04-2012, 10:03 AM   #6
Rivet Master
 
Shacksman's Avatar
 
1960 28' Ambassador
Vintage Kin Owner
1998 25' Safari
Avonton , Ontario
Join Date: Sep 2005
Posts: 1,213
Silkaflex in grey is available at Loews in the rain gutter section. I don't know what number as I am out of it right now, but it works very good on aluminum.
__________________
Doug & Terry
VAC - TAC ON-1
60 Ambassador Int.
98 Safari
1950 Spartan
1966 Globetrotter
Shacksman is offline   Reply With Quote
Old 08-04-2012, 10:20 AM   #7
Rivet Master
 
cameront120's Avatar
 
1972 25' Tradewind
North Vancouver , British Columbia
Join Date: Feb 2006
Posts: 3,422
Images: 23
If you have a glazing supply company near you, check with them. All of these sealants are also used in the installation of windows and curtain wall systems. I get all my Sikaflex from one such supplier.
__________________
Cameron & the Labradors, Kai & Samm
North Vancouver, BC
Live! Life's a banquet and most poor suckers are starving to death! - Mame Dennis
cameront120 is offline   Reply With Quote
Old 08-04-2012, 10:43 AM   #8
4 Rivet Member
 
colberjs's Avatar
 
1964 30' Sovereign
Porum , Oklahoma
Join Date: Jun 2012
Posts: 421
This is interesting. Sikaflex is available locally as concrete joint sealant. I will have to look at the numbers but I know it is available in gray. I'm assuming it is a different product.
__________________
colberjs is offline   Reply With Quote
Old 08-04-2012, 12:05 PM   #9
2 Rivet Member
 
tinman1's Avatar
 
2002 30' Classic
East Central , Alabama
Join Date: Aug 2006
Posts: 68
Alphonse,
You might try the following company - I was looking for Sikaflex 505UV (white) (not sure if have gray)for installation of my Maxim skylights - someone gave me the following company name. I purchased a couple of tubes ($5.69/tube[+ tax] - shipping $22.44 - total $34.61). Said shipping fee was high because "hazmat" applied. Go figure!!!!

Aim Supply Company
Larga, FL
Phone 800-288-3091 (ext 2504 "John")

Good luck!
__________________
Curt, Joan and "BonJovi"
tinman1 is offline   Reply With Quote
Old 07-15-2013, 12:44 PM   #10
4 Rivet Member
 
CA_Tallguy's Avatar
 
1977 31' Excella 500
Zavalla , Texas
Join Date: Jul 2012
Posts: 494
Just a note - I am seeing sikaflex at Home Depot near me but it just says sikaflex SL self leveling. It appears to be a formulation for concrete, which is confirmed at sikaflex website. Does not seem like a good choice for our trailers unless someone knows more about it and can say...

At lowes website, nothing is coming up for sikaflex but I would suspect that the formulation they might have or have had near rain gutters was probably more appropriate for airstreams. Still, not sure if I would use it except in a pinch without knowing if it would hold up,as well as the numbered versions that are recommended.

Well.. I am assuming that what you guys were finding at local places was not one of the specific sikaflex numbers like 221 or 721? (Yes I realize this is an old thread but I thought it might be useful to others to post this info here.)
__________________
WBCCI #1711
Texas Gulf Coast Unit, Texas Airstream Harbor
Angelina National Forest, Zavalla, TX
CA_Tallguy is offline   Reply With Quote
Old 05-12-2015, 02:41 PM   #11
4 Rivet Member
 
1976 24' Argosy 24
Milford , New Jersey
Join Date: Jul 2006
Posts: 283
I know this is a very old thread but I just ordered an ac unit from PPL Motorhomes in Texas. They sell Sikaflex 505Uv in grey by the tube in case anyone is still looking.
__________________
Gkiesel is offline   Reply With Quote
Old 05-12-2015, 09:19 PM   #12
Rivet Master
Commercial Member
 
lewster's Avatar
 
Vintage Kin Owner
Naples, FL , Hood River, OR
Join Date: Dec 2005
Posts: 7,279
Quote:
Originally Posted by CA_Tallguy View Post
Just a note - I am seeing sikaflex at Home Depot near me but it just says sikaflex SL self leveling. It appears to be a formulation for concrete, which is confirmed at sikaflex website. Does not seem like a good choice for our trailers unless someone knows more about it and can say...

At lowes website, nothing is coming up for sikaflex but I would suspect that the formulation they might have or have had near rain gutters was probably more appropriate for airstreams. Still, not sure if I would use it except in a pinch without knowing if it would hold up,as well as the numbered versions that are recommended.

Well.. I am assuming that what you guys were finding at local places was not one of the specific sikaflex numbers like 221 or 721? (Yes I realize this is an old thread but I thought it might be useful to others to post this info here.)
Their concrete formulation is different from their 221 formula, as 221 is not self-leveling and is a single part moisture cure polyurethane. Most of Sika's self-levelling products are silane terminated polymers. I have used their concrete formula.........on concrete. Works very well there, but I would be extremely hesitant to use for any other purpose.
__________________

__________________
Lew Farber...ABYC Certified Master Marine Electrician...RVIA Certified Master Tech ...AM Solar Authorized Installation Center...AIRSTREAM Solar & Electrical Specialist...Micro Air 'Easy Start' Sales and Installations
lewster is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 03:55 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.