Installation of New Awning Rail with 3M VHB Tape? - Page 2 - Fiberglass RV


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Old 06-24-2014, 12:03 AM   #15
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Originally Posted by kellyben View Post
Thanks, Denny. Was this particular thickness recommended as well, or did they make any mention of which direction to go as far as that's concerned?

I think that part number only comes in one thickness. They said nothing about direction but really stressed proper surface prep: clean both surfaces thoroughly then wipe down with alcohol just before applying tape.

I was drawn to the tape because I didn't want to risk leaks by putting holes in the roof to mount my solar panel. It turned out to be a lot easier than drilling, bolting and caulking too.


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Old 03-24-2015, 10:09 PM   #16
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Hi Denny,

How has the tape held up so far with your solar panel application? Still considering using it for an awning rail install.

Thanks,

Ben
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Old 03-25-2015, 09:29 AM   #17
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It's been up there a year, 7 or 8,000 miles of towing and ten months of outdoor storage. Still stuck on as good as new.


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Old 03-25-2015, 09:42 AM   #18
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Thanks, Denny. Any thoughts on whether you'd trust the VHB tape with an awning rail holding a 22lb bag awning? I know 3M recommends 4 square inches of tape per pound of load and I'd be around double that with my application.
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Old 03-25-2015, 06:31 PM   #19
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Installation of New Awning Rail with 3M VHB Tape?

I'm an engineer by training and find if you do the math and follow directions things work out. If you are stressing the tape half of 3M's spec and prep the bonding surfaces per 3M's spec you should be fine.

I'd use it for the awning. I also found 3M's tech support to be great. Call them, you will be pleasantly surprised.


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Old 03-26-2015, 08:06 PM   #20
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I installed a Sunbrella bag awning to my 13' Scamp almost a year ago. Used 1" Width 3M VHB Tape 5952 and I think 3 or 4 strategically placed rivets. Don't know the weight of it but the railing has stayed put and I have zippo leaks.
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Old 04-07-2015, 06:40 PM   #21
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Hi Denny,


I agree, 3m's support has been excellent. We were at the annual trade show for our hardware store supplier in Orlando in late Feb. I had some of the same questions that have been asked here, but, at the time, only with respect to mounting a solar panel , as you have. There was a member of the technical department at the 3m booth. He answered nearly all my questions and while I waited, he called another tech person at 3m when he did not have an answer to one of the questions.


My question was about surface preparation of fiberglass before applying VHB tape. The "VHB Tape" specialist on the phone call from the office recommended using Acetone to clean the fiberglass gelcoat , and then a light scuffing using a Scotch Brite type pad or very light touch with very fine sandpaper before applying the VHB tape.


The tech rep. at the show also mentioned the fact that you should wait at least 24 hours, and preferably more, before putting full weight on the item. And, that the "Extreme Mounting Tape" #414 that is sold at many hardware stores, is consumer packaging of VHB tape. That product is advertised to hold 20# for a 40" strip, or 1/2# per square inch. There is another 3m product that says it will hold 10#per 40" strip, but that is not true VHB tape. #414 is 1"x60", and sells for around $7-10, but appears about .025 thick--and most folks have been using the .045 thick VHB tape for most purposes on our FGRV's. So, if you can use the thinner version of VHB, it's available on the shelf at many Hardware Stores.


And, most all sizes and thicknesses are available through Grainger, but almost always require a 2 day wait. That was the case when I ordered some VHB tape to install bendable solar panels on our Eggcamper. Grainger ordered it from a regional warehouse and I picked it up at the local branch store in 2 days. Still haven't installed the panels yet, but hope to soon. Maybe I'll install an awning with VHB also.
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