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Thread: Glue for Hi Stress App.
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24th January 2013, 05:44 AM #1Novice
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Glue for Hi Stress App.
Hi Woodies, can anyone tell me of a good, inexpensive glue that withstands high tension please?
I make harps (pls. see my post in the Welcome Wagon) & need a glue that will cope with the 200 or more kg tension from the tuned strings. Yep, Selleys 308 & Araldite I may try, but I'm looking for one like the US made DAP Weldwood plastic resin glue -a brown powder that's mixed with water to use & for cleaning up, & inexpensive, & really strong. Hide glue -synthetic from urea?
Thanks,
Harper.
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24th January 2013 05:44 AM # ADSGoogle Adsense Advertisement
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24th January 2013, 07:14 AM #2
In order:
Certified for wooden aircraft construction epoxy. ( http://boatcraft.com.au/informationp...s/T-88-TDS.pdf)
Marine epoxy as used for building large wooden yachts. ( Boatcraft Pacific Boat building supplies for Australia. )
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Everything else. (They don't build yachts out of DAP!)
Both are cheaper than you expect when you compare them to hardware store prices (its only about five times cheaper than araldite - roughly $50 a litre).
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25th January 2013, 01:18 PM #3
I would go for epoxy you can get here. As has been pointed out Boatcraft will do or try Techniglue 2 part. I have used it to laminate archery bows so it copes with stress. The join will be stronger than the wood but the surfaces must be cleaned with acetone (metho 2nd pick) just before glue up. Cleaning gets rid of oils that hinder the glue bond with the surface. Some timbers are oily but dirt and oil from the hands also can be a problem.
Regards
John
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30th January 2013, 07:51 PM #4Novice
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30th January 2013, 07:53 PM #5Novice
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30th January 2013, 08:41 PM #6
The closest* you could get here would be Selleys 308 High Stress Wood Glue, which is a similar sort of powdered urea formaldehyde glue; however, strength wise, any wood glue from $2 store craft PVA up is capable of giving a stronger than wood join - but it's resistance to creep under load that you need. 308 may be less than ideal if you are using high density Australian timbers.
*Close, except for the price, which will have the usual Selleys brand markup and typical 'Australians are too dumb to know they are paying too much' tax on it. 308 is about $35 for 150 grams vs. $35 (RRP, US$) for 2kg of the DAP. And I thought Selleys stung us on their epoxy pricing!!!!!
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1st February 2013, 03:38 PM #7Member
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If you can source some Megapoxy that stuff is very strong - and will come with info regarding the stress it can withstand. I remember at school one kid made an outdoor table and he joined the legs to the table top with only that glue - no joints whatsoever and the legs were wonky anyway. He proceeded to stand on top of it to prove it was a success.
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5th February 2013, 04:24 PM #8Novice
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Thanks, mates.
Yeah, thanks again, all. I'd still like to get hold of the DAP W/W plastic resin, I guess since I'm used to it. It's inexpensive, easily managed, and quite strong enough. I found the Glue Guru in NZ import it, so I shall inquire re the postage -should be a lot cheaper than buying it in the US.
Hooroo,
"Harper" Rod
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19th April 2013, 07:28 PM #9Member
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I've had great success in high-tension joins with Titebond 3 and Gorilla Glue. Though of course not mixed together or anything.
TB# is water soluble so cleanup is easy, and is super strong. GG sets fairly quickly and provided the surfaces are lightly degreased prior to glue-up, can handle oily woods well. And it has very little creep.
I make bows too, though only with two laminations, so the glue joint is under a massive tension and shear load.
DaveArticles for beginning bowyers, Australian bowyers, and beginning Australian bowyers:
http://www.tharwavalleyforge.com/ind...shop/tutorials
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6th November 2013, 09:46 PM #10Novice
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Tech-Grip by Sikabond I've found the best so far.
Hi, Thanks guys, for your suggestions. As well as a strong glue that handles sustained tension, I need one that dries slowly, to allow time to glue joints totalling up to nearly 3 m, involving careful alignment of 5 pieces of wood. Also, I use small amounts at a time. Tried Selley's Araldite, sure, it's plenty strong, but dries too fast, and it's messy to use, and expensive. Selleys have taken their 308 off the market.
The Techgrip is a bit messy, I clean up with turps. It foams up as it dries, so filling any voids. If this is undesired, I find it's best to remove it before it dries, tho this is possible.
Anyway, I'm moving back to Belize, Central America, very soon, (please see my posting for the bargain sale of my plant and tools), where I can get Weldwood plastic resin glue.
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