In reading about polyurethane glue they always talk about the expansion qualities of the glue. But what does this expansion do to the joint? Does it have a negative effect on the joint or none??
steve
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The biggest result is that a little goes a long way. The excess will foam out of the joint as it cures. It's recommended that you only put glue on one surface, then dampen the other surface, as it cures in the presence of moisture. It WILL cure if you coat both surfaces with the glue, but the amount of foam out you'd get would be a real mess to clean up. The expansion won't actually force the joint apart though or anything else weird.
A couple of other tips:
Wear disposable gloves. The stain on your skin will take about a week to go away.
The stuff has the consistency of syrup or honey. It's quite a mess to try and clean up any squeezeout while it's still liquid. I've seen some folks advocate wiping off squeezeout with acetone. I've done that and IMHO, that still a pretty messy way to go. I think you'll get better results letting it foam out then slicing off the foam with a sharp chisel once it's no longer liquid, but not completely hardened yet either.
Waddaya mean it wont fit through the door?
Poly glue expands agressively as it cures. This creates a force that tends to force the glued surfaces apart. That is the reason that joints made with poly glues must be tightly and carefully clamps and must stay in the clamps until fully cured. The cure time might be 6-12 hours.
Thanks, Metod. I'd never heard of using peanut butter, I'll give it a try, has to be cheaper than nitrile gloves.
I've never had polyurethane glue fail, but I only use it on jointed boards. It does clean nicely with a chisel when dry.
Don't think me a safety nut, but peanut butter won't pull any absorbed nasty chemicals out of your body. If you can get to a Harbor Tool and Freight Nitrile gloves are around $6 for a big box, 100 ct. Save the peanut butter for torturing your dog.
http://order.harborfreight.com/EasyAsk/harborfreight/results.jspJohn O'Connell - JKO Handcrafted Woodworking
The more things change ...
We trained hard, but it seemed that every time we were beginning to form up into teams, we would be reorganized. I was to learn later in life that we tend to meet any new situation by reorganizing; and a wonderful method it can be for creating the illusion of progress while producing confusion, inefficiency, and demoralization.
Petronious Arbiter, 210 BC
I went to the link and it returned an error. I went to the HF store and they had them at twice the price quoted.
I settled for their two ply nitrile/latex gloves at 12.99.
Regards,
DonI'm not the man I used to be, but then I never was!
Metod, does the peanut butter remove the residue after the poly glue has set-up or do I have to use it right after getting the glue on my hands?
I've got a black stains I'm waiting to wear away...
Thanks,
Mark
Measure it with a micrometer, mark it with chalk, cut it with an ax.
Take it from an older but wiser woodworker, NOTHING DISSOLVES CURED POLYURETHANE GLUE!!!!!!!!!!!!!!!!!!!!!
Years ago I had a job demonstrating industrial urethane foam for packaging. It's essentially the same material. At an industry show I picked up a gun that had (unbeknownst to me) become plugged with foam. The gun 'backfired' a wad of the stuff on my nice three piece suit. Uuuughhhh!
I took it to an adventurous dry cleaner who said he'd see what could be done for it. Three weeks later he called and said that with all the chemicals available to his industry, and with a lot of research with his supply companies, there was nothing to be done for the suit except to 'dumpsterize' it.
'Nuf sed.
Regards,
DonI'm not the man I used to be, but then I never was!
No such thing as a "nice three piece suit" :-)I only have to wear suits now at funerals. I'm so glad that business has gone "casual." The most I do now is wear a blazer with a tie and dockers. (of course I don't do much work in law or financial services where suits are still the norm).Yes I suspected as much on the urethane glue.BTW, why have the whole jar of peanut butter in the shop, why not just a bottle of peanut oil? Anybody try that?Mark
Measure it with a micrometer, mark it with chalk, cut it with an ax.
I clean my hands with peanut butter. I have a jar for just that purpose in my basement. Easy on the skin. Cleans other stuff too.
Cool! Should I get Chunky or Creamy? -:)
Waddaya mean it wont fit through the door?
Does it have a negative effect on the joint or none??
Not that I have found. I like to use it to glue teak when it will be used in a damp or wet environment. The foam out does get messy, and it is a bear if you get it on your hands.
369.37 is pretty neurotic in it's own rite, unless of course your a a fellow engineer type. Then you're just anal retentive. Like I said I'm not a safety zealot and probably use the gloves because I'd yet to discover the power of peanut butter. Does it work on expoxy too?
BTW love the super crunchy stuff myself w/ bananas & honey, orange marmalade, or red onion. I've been told it's great w/ mayo. but haven't worked up the courage to try that one.
John O'Connell - JKO Handcrafted Woodworking
The more things change ...
We trained hard, but it seemed that every time we were beginning to form up into teams, we would be reorganized. I was to learn later in life that we tend to meet any new situation by reorganizing; and a wonderful method it can be for creating the illusion of progress while producing confusion, inefficiency, and demoralization.
Petronious Arbiter, 210 BC
Nice board. Nice inlay in the table too. I bet you bought it at Ikea, right? I hear they have all the cool stuff. :)
John O'Connell - JKO Handcrafted Woodworking
The more things change ...
We trained hard, but it seemed that every time we were beginning to form up into teams, we would be reorganized. I was to learn later in life that we tend to meet any new situation by reorganizing; and a wonderful method it can be for creating the illusion of progress while producing confusion, inefficiency, and demoralization.
Petronious Arbiter, 210 BC
I use Poly alot, and the best thing for cleanup (while uncured) is denatured alcohol.
Epoxy is completely nuetralized by vinegar. Cleans it instantly from hands, tools etc. DO NOT use it to wipe excess off of a glue hgowever as it will nuetralize the glue joint also. Aloha, Mike
psychologically more imbalanced ??
Think about being chased by a Saber Tooth Tiger!
Peanut butter worked for me. I used it with a 3m scratch pad and it took it right off. I'll just have to remember not to wear a three piece suit on my hands while using it... ;-)
Somebody said that coating your hands with a dab of dawn dish soap prior to changing the oil on your car kept clean up quick and easy.
I think a dumpster is a great place for a 3 place suit btw.
I don't try to touch it. It just jumped on my hands.
I'll try the vinegar too.
Regards,
Ken
"Do as you would be done by." C.S. Lewis
Peanut butter and Poly Glue (PBP instead of PBJ).Tried it last night, Boy was my wife puzzled :-)Worked like a charm.I had a messy glue-up. Trying to glue two pieces of plexiglass at a right angle with a brace. Twice I put the screw into the brace and it cracked - ARRRGH! Glue everywhere including my hands. No dark stains on my fingers this morning thanks to Skippy Creamy PB.Thanks,
Mark
Measure it with a micrometer, mark it with chalk, cut it with an ax.
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Hi Metod,
Just tried Motor Oil (10W-30) with urethane glue. Seemed to work like the peanut butter. Does not smell as nice but no chance anyone will mistake it for food in the shop :-)
Mark
Measure it with a micrometer, mark it with chalk, cut it with an ax.
View Image
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