Big.Mike Posted July 23, 2013 Share Posted July 23, 2013 As my roof panel will be dropped on vertically, 'creep' is not a problem. What is of more concern is a degree of adjustment whilst it is still 'wet' so I can ensure a bit of adjustment to keep the alignment correct before it sets. Creep can happen horizontally as well as vertically, some adhesives remain partially "liquid" for a very long time. VHB tape is a one shot deal, you need to be damn sure it's in the right place before you stick stuff down. Quote Link to comment Share on other sites More sharing options...
Jocklandjohn Posted July 23, 2013 Author Share Posted July 23, 2013 Understood. I'll have to see what I can rig up if I end up using the one-shot tape - what I'm hoping I can do is build a light wooden frame around the alloy subframe so that the final thin alloy roof sheet can drop down into exactly the correct place. Keeping little bits of rubbish from getting stuck underneath will be the challenge! Quote Link to comment Share on other sites More sharing options...
Maverik Posted July 23, 2013 Share Posted July 23, 2013 Well I got a nice call today from the local 3M rep with regard to their "bonding" products, and she's coming over for a demo session next week. hopefully she'll be having some freebies with her Quote Link to comment Share on other sites More sharing options...
Big.Mike Posted July 23, 2013 Share Posted July 23, 2013 Well I got a nice call today from the local 3M rep with regard to their "bonding" products, and she's coming over for a demo session next week. hopefully she'll be having some freebies with her 3M rep, blimey they're like hens teeth down here... Good luck, they are normally fascinating people to talk to... I had a 2 hour discussion about cynoacrylate (super glue) with the guy from loctite once. It reacts with water, normally there is enough in the air, but on dry days or in dry environments it won't work. Breathing on it or spit makes it work! Quote Link to comment Share on other sites More sharing options...
Dunc Posted July 23, 2013 Share Posted July 23, 2013 3M rep, blimey they're like hens teeth down here...Good luck, they are normally fascinating people to talk to... I had a 2 hour discussion about cynoacrylate (super glue) with the guy from loctite once. It reacts with water, normally there is enough in the air, but on dry days or in dry environments it won't work. Breathing on it or spit makes it work! We get our iso from ICI, and their reps are even less seen than 3M! We use it as the bonding chemical element in moulding bumpers and body panels. Quote Link to comment Share on other sites More sharing options...
Jocklandjohn Posted July 23, 2013 Author Share Posted July 23, 2013 Mav - is your rep from Aberdeen? Quote Link to comment Share on other sites More sharing options...
rick Posted July 28, 2013 Share Posted July 28, 2013 3M Scothweld 2216BA structural aircraft adhesive. I used to use it to bond race cars together, it's used on most aluminium/unobtanium aircraft parts including military jet skins. Etch the surfaces and use lots of nice, carcinogenic methyl ethyl ketone to clean the oxide coating. Lots and lots and lots of MEK, wipe clean with white paper towel to check then double check with a water bead test, then re-clean and apply adhesive. Portions are critical, either by volume or weight, but easiest just to use both tubes entirely. The stuff is amazing, brilliant in shear, and has flex. Quote Link to comment Share on other sites More sharing options...
Dunc Posted July 28, 2013 Share Posted July 28, 2013 3M Scothweld 2216BA structural aircraft adhesive.I used to use it to bond race cars together, it's used on most aluminium/unobtanium aircraft parts including military jet skins. Etch the surfaces and use lots of nice, carcinogenic methyl ethyl ketone to clean the oxide coating. Lots and lots and lots of MEK, wipe clean with white paper towel to check then double check with a water bead test, then re-clean and apply adhesive. Portions are critical, either by volume or weight, but easiest just to use both tubes entirely. The stuff is amazing, brilliant in shear, and has flex. Yes, as is MEK. Lots of our parts at work are cleaned with MEK before going through deionising. Quote Link to comment Share on other sites More sharing options...
Jocklandjohn Posted July 28, 2013 Author Share Posted July 28, 2013 Thanks for that - MEK sounds good. I wont be using it in the kitchen that's for sure! Do I need a mortgage for it though? Quote Link to comment Share on other sites More sharing options...
Dunc Posted July 28, 2013 Share Posted July 28, 2013 No, it's quite cheap. For example http://www.ebay.co.uk/itm/5L-Methyl-Ethyl-Ketone-99-7-ACS-MEK-2-Butanone-/130776166419?pt=UK_BOI_Medical_Lab_Equipment_Lab_Supplies_ET&hash=item1e72ddf013 Quote Link to comment Share on other sites More sharing options...
Maverik Posted July 29, 2013 Share Posted July 29, 2013 Mav - is your rep from Aberdeen? Aye, evidently she is, I just found an inquirey form on there UK website and filled it in, was full expecting nothing to come of it, but I got a call the following day, rather impressed. Quote Link to comment Share on other sites More sharing options...
Jocklandjohn Posted July 29, 2013 Author Share Posted July 29, 2013 Good to know they're that responsive. Mind you if its expensive its no wonder they follow up sharpish! Quote Link to comment Share on other sites More sharing options...
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