Register

If this is your first visit, please click the Sign Up now button to begin the process of creating your account so you can begin posting on our forums! The Sign Up process will only take up about a minute of two of your time.

Results 1 to 15 of 15

  1. #1

    Join Date
    Jun 2009
    Location
    , IN
    Posts
    2
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    What adhesive should I use on foam?

    I recently bought a Super Cub LP RTF (made of Z foam) by Hobby Zone. Icrashed it and broke the plastic firewall. I bought replacement parts at Hobbytown, and knowing I was a beginner and needed help, they recommended Zap Goo pt-12 adhesive (which they sold me). For some reason I got nervous about it and called them back. They then recommended I try it first on some of the foam in the packing material. When I did, the foam from the packing immediately started to melt.

    Since then, I have talked to Hobbytown twice, Hobby Zone tech reps twice, and even the tech rep for the company that makes Zap Goo. I have been told use the Zap Goo, don't use the Zap Goo, use a medium CA, don't use a CA, and in the end, the people at all three places ended up saying they didn't know what to tell me, except that I might just have to keep buying stuff and scraping some foam off the engine block (I really don't want to cut my plane up) to experiment with.

    It makes no sense to me that these tech experts can't tell me what to use. The problem is that foam-safe CA apparently is a permanent bond, and I need a flexible bond (which nobody seems to know a product that is flexible and foam safe) because Ineed to be able to replace the firewall again (if I damage it again) without tearing up the foam. I have been told that Zfoam would probably not be the same consistency as the styrofoam I experimented on, but none of these people can guarantee me that whatever I use won't eat the Zfoam too. I saw a video by the plane designer and he talked like you don't even have to use foam-safe adhesive on this plane!

    Is there anyone out there that has ever had to use a flexible adhesive on Zfoam, who can tell me what to use, and is really sure of it? I would really appreciate the help.

  2. #2
    Allfat's Avatar
    Join Date
    Apr 2008
    Location
    St Paul, OR
    Posts
    400
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: What adhesive should I use on foam?

    I have a T-28 trojan that I pretty much broke into a bunch of pieces.  It was all put back together with hot glue and it worked really well.  I also used epoxy on it, as well as foam safe CA.  I even used Elmers glue once because that was all that was available where I was, it worked too.

  3. #3
    hugger-4641's Avatar
    Join Date
    Nov 2008
    Location
    McKenzie, TN
    Posts
    1,835
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: What adhesive should I use on foam?

    I have used all of the above mentioned glues on my Super Cub, T-28, Corsair, J-3 etc. The best glue I've found so far for foam is UHU Creative Film & Foil. It is sold in Europe as UHU Por. and some hobby shops here in the U.S. also sell it. You can order it online from Saunders-usa.com. It does not dry hard and brittle like C.A. but retains a very slight amount of flexibility and is very strong. 
    Jerry
    AMA -922698 Nomal people scare me, but not as much as I scare them...

  4. #4
    brett65's Avatar
    Join Date
    Dec 2007
    Location
    Oklahoma City, OK
    Posts
    2,505
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: What adhesive should I use on foam?

    The titebond II that everyone builds wood planes with also works good on foam. The hotglue or epoxy will make it heavy if you use a lot of it.
    No arsenal or no weapon in the arsenals of the world is so formidable as the will and moral courage of free men and women.

  5. #5
    Moderator CGRetired's Avatar
    Join Date
    Sep 2004
    Location
    Galloway, NJ
    Posts
    8,999
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: What adhesive should I use on foam?

    Or good old 2 part epoxy.
    Skylark 70 - OS .75 AX; Excelleron 90 - OS 1.20 AX; Venus II - OS 1.20 AX; And, I still fly my trainer, Hanger 9 Alpha - OS .46 FX! Some electrics. Airtronics RD8000 - Spektrum DX7 - DX6i. AMA 705964.
    Semper Paratus!

  6. #6

    Join Date
    Jun 2009
    Location
    , IN
    Posts
    2
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: What adhesive should I use on foam?

    Thanks for all the replys so far!  So much more helpful than the rep responses.

  7. #7
    MetallicaJunkie's Avatar
    Join Date
    Sep 2006
    Location
    Donna, TX
    Posts
    5,430
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: What adhesive should I use on foam?

    gorilla glue
    \"Propellers are notorious for inflicting serious bodily harm while vigorously defending their space\" George Aldrich

  8. #8

    Join Date
    Dec 2001
    Location
    FL
    Posts
    7,276
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: What adhesive should I use on foam?

    Any of the epoxys work quite well and do not add much weight if you put it on thin.  There is no need for a heavy coat.  Gorrilla glue also works well if you have a way of clamping or holding parts together while it cures as it foams up and tries to push the parts you are gluing apart.  Foam safe CA also works well.  Carpenters glue or Titebond may be a problem unless you can leave it set undisturbed for 24 hours or more as the inside areas are sealed off from the atmosphere when the outer areas start to cure.  Thin joints work out okay with the Titebond.

  9. #9
    jimmyjames213's Avatar
    Join Date
    Aug 2008
    Location
    L
    Posts
    1,655
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: What adhesive should I use on foam?

    elmers white glue or epoxy is what i use. both work fine. no need  for anything more expensive
    Anything worth doing.............is worth overdoing

  10. #10
    combatpigg's Avatar
    Join Date
    Nov 2003
    Location
    arlington, WA
    Posts
    17,678
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: What adhesive should I use on foam?

    3M77 spray adhesive works for butt gluing foam blocks or panels together. I've used it for veneering balsa or ply to foam, too.
    WHO GUNNA FEED MAW KEEEIDS..???

  11. #11
    -pkh-'s Avatar
    Join Date
    May 2004
    Location
    Emmaus, PA
    Posts
    3,354
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: What adhesive should I use on foam?

    I've been using polyurethane glue (like Gorilla glue or Elmer's Ultimate Glue). I paint it on one side of the break, and then fit it back together. I tape it together with scotch tape or packing tape so the foaming action doesn't push it apart, as Rodney mentioned. I don't spray any water on the joint unless I need some gap filling, since that will cause it to foam much more.

    In fact, if you need some gap filling, you can mix some poly glue with a couple drops of water, and it will foam up into a foamy paste, and you can gob it into the areas you need filled. Just beware, if you mix in the water, it foams up and cures much quicker, so you have less working time than you would have otherwise.

    I don't know what Zap Goo is, but I do know Shoe Goo has a solvent that will eath styrofoam.

    For a flexible glue, as mentioned above, the UHU foam glue can be found at most craft shops.

    Paul - Helis: Two Raptor 50V2s, Venture 30CP, Blade CX2
    Planes: Twist 60, Tribute 36, Two PZ BL P51s, Two F27C Strykers

  12. #12
    opjose's Avatar
    Join Date
    Nov 2005
    Location
    Poolesville, MD
    Posts
    12,548
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: What adhesive should I use on foam?


    ORIGINAL: jimmyjames213

    elmers white glue or epoxy is what i use. both work fine. no needΒ* for anything more expensive
    AND it makes the repair seams disappear which does not happen with most of the other glues.

    Just use a lot to permeat the sections to be repaired fully.

    Wipe off any excess that dribbles out when you push the parts together, and immobilize until dry.

    There is an art . . . to flying. The knack lies in learning how to throw yourself at the ground and miss.

  13. #13

    Join Date
    Feb 2002
    Location
    Carol Stream, IL
    Posts
    1,332
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: What adhesive should I use on foam?

    Well the Super Cub LP RTF by HobbyZone is made out of what they call is "Z" foam. On page 28 of your manual it states that any CA is ok on your wing and fuselage. That Zap Goo will probably work fine. I recently cracked up a ParkZone Radian (also made of "Z" foam), broke the fuselage in half and the wing halves had all sorts of breaks. I asked the same question, and even originally bought "foam safe" CA. But with further research, found out that regular CA works just fine and maybe even be prefered. I used Dave Brown Regular Thick Ca on one side of the break, with a spray of activator on the other side. When I put the broken pieces together I had minimal what I call "ooze out". But great adhesion and no melting foam. The Z foam is not like foam you would find in something like the packaging material the plane came in or a foam ice chest. My Radian had a serious crash where most would consider totaled. But I'm sure I'll be able to complete the rebuild and it will fly again. Good luck to you.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Vt58824.jpg 
Views:	43 
Size:	65.5 KB 
ID:	1219154  

  14. #14

    Join Date
    Feb 2002
    Location
    Carol Stream, IL
    Posts
    1,332
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: What adhesive should I use on foam?

    Oh and I also wondered about aliphatic glues like Elmers. The problem I see with Elmers is that with the extended break I had, I was worried that the glue would dry and seal around the outside of the break, not allowing air to get to the inside of the break, making an ineffective repair. So I'm not sure Elmers or any aliphatic glue would be the best choice.

    With Epoxy, although it generally sticks and bonds to almost anything, I'm not sure it would to the "Z" foam. Have you ever mixed some epoxy on the lid of a coffee can? When it sets or hardens, you can peel it right off. I fear the same with the "Z" foam.

    RC560, canopy glue will also work, as long as the break isn't too thick and air can penetrated the bonding areas. I plan to partially skin with cut fabric softener sheets and Pacer Formula 560 canopy glue over the break lines to give added strength.

    So that's why I settled for regular Thick CA. I try not to use a lot of CA because of cost and fumes, but it seems the best solution. At least for me.

  15. #15
    -pkh-'s Avatar
    Join Date
    May 2004
    Location
    Emmaus, PA
    Posts
    3,354
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: What adhesive should I use on foam?

    Tom,

    Thanks for the info on your Radian repairs. I've got a broken tail boom on my Radian, and have been debating whether to use my old standby, poly glue, or try Elmers, CA, or other glue.

    Sounds like regular CA will work well.
    Paul - Helis: Two Raptor 50V2s, Venture 30CP, Blade CX2
    Planes: Twist 60, Tribute 36, Two PZ BL P51s, Two F27C Strykers


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
All times are GMT -6. The time now is 06:23 AM.

SEO by vBSEO 3.6.1 ©2011, Crawlability, Inc.