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  #1  
Old 01-23-2016, 01:47 PM
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Default Spray Adhesive Question / LJ II

With timely delivery of my Little Joe II kit before the blizzard yesterday, I've decided to start the build as the snow piles up outside.

Apologies up front as i'm certain this question has been addressed many times. I am considering using 3M 90 to attach the body wrap.

In full disclosure i have not had great luck with this fixative building the Sat V most likely due to a heavy application causing some crazing on one of the wraps.

Suggestions for how to best apply the aforementioned or better ( less idiot proof ! ) alternatives much appreciated. Thanks !
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Old 01-23-2016, 02:33 PM
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Spray a few light coats instead of a single heavy coat and allow time for the solvent to flash off before it damages the styrene.
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Old 01-23-2016, 06:07 PM
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3M 90 is rated as a high strength adhesive. I think I'd pick lesser formulations, like 77 or 45, and not run the risk of ruining the wrap. I have used 77 a lot in the past. The last time I bought spray adhesive, all I could find I'd Elmers. I used it on my styrene wraps on the Estes Saturn 1B with excellent results.

I mentioned in another thread that Hobby Lobby carries both 3M 77 and Elmers. The Elmers was about 1/2 the price of the 3M.
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Old 01-23-2016, 07:09 PM
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Quote:
Originally Posted by LeeR
3M 90 is rated as a high strength adhesive. I think I'd pick lesser formulations, like 77 or 45, and not run the risk of ruining the wrap. I have used 77 a lot in the past. The last time I bought spray adhesive, all I could find I'd Elmers. I used it on my styrene wraps on the Estes Saturn 1B with excellent results.

I mentioned in another thread that Hobby Lobby carries both 3M 77 and Elmers. The Elmers was about 1/2 the price of the 3M.

High strength doesn't necessarily mean high volatiles/solvents, which is what ruins the wrap. 3M Super 77 is only rated for HSE plastics, where 3M 90 is rated for both LSE and HSE. Odds are it won't craze the styrene as easily as Super 77. Use light coats with either one. Testing on scrap styrene material would be a good idea too. BTW, today's Super 77 isn't the same 3M 77 we used 20 years ago for foam core wings.
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Old 01-23-2016, 09:39 PM
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There is a special double sided laminating tape available that I used on my Apogee Saturn kits. I will have to see if the name is on the inside of the roll if there is interest. It was recommended in the Apogee instructions. I still have a almost a full roll. I have not decided on mine yet . Just opened the box to look at the parts.
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Old 01-24-2016, 04:14 AM
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Default Attaching Vac form Wraps

On the Estes web site-----a discussion on attaching the SATURN V wraps.................

http://www.estesrockets.com/customer-service/faq/
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Old 01-24-2016, 11:35 AM
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Thanks to all for the great tips !

3 light coats of 3M 90 sprayed on to the wrap from about 2 feet worked perfectly !

My little balloon trick does a great job of maintaining equal pressure too.

Thanks again !
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Old 01-27-2016, 01:40 PM
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Since the fins mount to the wrap, no doubt one would want to use the best glue possible when attaching the wrap. When I built the Apogee Saturn V one way they mentioned also was to wicker thin ca around the edges of the wrap.

I like the strength of the 3M 90 to. I'm going with the 90 and if needed, I will add thin ca on all seams.
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Old 01-27-2016, 06:21 PM
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Quote:
Originally Posted by Molniya
Thanks to all for the great tips !

3 light coats of 3M 90 sprayed on to the wrap from about 2 feet worked perfectly !

My little balloon trick does a great job of maintaining equal pressure too.

Thanks again !

Thanks for doing these posts. I believe I'm now convinced to use spray adhesive instead of "The Devil's Mucous" (contact cement.)
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Old 01-27-2016, 07:03 PM
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Quote:
Originally Posted by jeffyjeep
Thanks for doing these posts. I believe I'm now convinced to use spray adhesive instead of "The Devil's Mucous" (contact cement.)

I plan on using 3M spray but I have to give "The Devil's Mucous" it's due. My Centuri Saturn kit wraps are still solid thanks to the stuff.
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