#241
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I only have Tenax 7r here right now. It's methylene chloride, IIRC. By the time I drive 80 miles round trip or pay shipping for a small hobby bottle, I will end up paying as much or more for it than a small can of straight MEK from the local hardware store. I don't have time to start on the model right now, but I may go ahead and do some testing.
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I love sanding. |
#242
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FWIW - the bottle of "Bondene", which is totally useless for ABS (this kit's wrap anyway), lists "Dichloromethane" as the only named chemical on the label. Quote:
So I would not dare to trust Tenax without doing a test like I mentioned, on the underside of the kit's ABS wrap to see if it feels "sticky" from melting.... or not sticky (worthless/dangerous). Actually,l are you sure Tenax 7r is methylene chloride? I can't find a definitive "official" source for what its main ingredient is. A person says MEK, but that's not official. If you do have a bottle, please read what the label say it uses. Plastic Weld labels says it uses MEK, and bondene uses Dichloromethane. OK, I later found other sources saying that Teanx IS made of methylene chloride / dichloromethane. A commenter on a model train forum said "My experience with Tenax has been best summed up with "Spit and water holds together better than that"."
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Contest flying, Sport flying, it's all good..... NAR# 18723 NAR.org GeorgesRockets.com Georges'CancerGoFundMe: https://www.gofundme.com/f/help-geo...ay-fight-cancer Last edited by georgegassaway : 03-11-2016 at 02:48 PM. |
#243
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Tenax-7R was the glue I used to assembly the 8 Little Joe II kits I built. In fact I only used CA on a couple of the models to attach the fins to see how it would hold up. I also used CA glue in a couple places on the wrap to hold down the ends.
That Glue Tube graphic Estes uses in the instruction manuals a generic symbol to represent all plastic glues. Hopefully I can get specific name brand glues to be mentioned in the instruction manual for any additional Little Joe II kit productions, the Saturn V kit and any other models that may come out in the future that uses a vacuum form wrap or parts. John Boren |
#244
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They don't list the ingredients on the bottle. I'd have to get hold of an MSDS sheet to be 100% sure, but I believe it's near pure methylene chloride (dichloromethane). Quote:
It has always worked well for me on styrene, but it doesn't work like the old style Testor's tube cement of the 70's if there are gaps to be filled. The parts have to fit really well and you let it wick in. If you need to fill gaps, you have to dissolve styrene shavings in it, which worked great on my Maxi V-2 fins when I had a spot or two that didn't fit perfectly.
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I love sanding. |
#245
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Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see: http://www.lulu.com/content/paperba...an-form/8075185 http://www.lulu.com/product/cd/what...of-2%29/6122050 http://www.lulu.com/product/cd/what...of-2%29/6126511 All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com. NAR #54895 SR |
#246
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Deluxe Materials, a UK based company that specializes in glues and other products has different adhesives that may work on the dissimilar plastics on the LJII and other rockets. The only problem is the products can be hard to find here.
https://www.deluxematerials.co.uk/en/ |
#247
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Tenax 7R is Dichloromethane AKA Methylene Chloride in it's latest form.
I believe it used to be a Perchloroethane/Methylene Chloride blend. The older formula was a little more user friendly in that it took a little longer to dry and penetrated just as well. OLD formula Testors Liquid Plastic Cement was a 70% MIBK (Methyl Iso-Butyl Ketone)/30% MEK (Methyl Ethyl Ketone) blend and worked REALLY well. New formula Testors Liquid Plastic Cement is JUNK 100% MEK that takes forever to dry and does not bond very well.
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When in doubt, WHACK the GAS and DITCH the brake !!! Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't ! Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY. ALL systems are GO for MAYHEM, CHAOS, TURMOIL, FIASCOS, and HAVOC ! |
#248
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The UK firm, Deluxe Materials, that chrism suggested above not only has numerous specialty bonding agents (and they attend the Toledo Hobby Show, too!), but they also sell fine-line applicator bottles & tips, which could be useful for building the Little Joe II as well as other scale kits.
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Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see: http://www.lulu.com/content/paperba...an-form/8075185 http://www.lulu.com/product/cd/what...of-2%29/6122050 http://www.lulu.com/product/cd/what...of-2%29/6126511 All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com. NAR #54895 SR |
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