glue strength

[William R. Monroe]

Hi Terry,

Again, good point.  Very true in terms of strength.  I guess I was pointing 
out the strength issues, primarily as Hot Hide related to Cold Hide, given 
many a technician's propensity for Hot Hide because of a belief that it has 
superior strength over Cold Hide.  I do recognize that another reason some 
don't like cold is because it is suggested that it's working time is too 
long for some applications.  I can see that would be a valid point, but I've 
not experienced it.  As Paul R-J says, he uses it with great success in Key 
rebushing.

I completely agree that strength is irrelevant if the failure in the testing 
is in the wood.  The article stated that there were both types of failures 
(in the joint, and in the wood) and said that joint failures were 
predictable mostly in the weaker glues, but they were not specific as to 
which ones.  Could use more info there.

And yes.  Certainly we should be choosing our glues with their working 
properties as a major consideration.  Thanks to everyone for reminding us 
(me) of these things.

William R. Monroe




> Something else to consider - if the glue joint is stronger than the wood 
> itself, from a practical standpoint, how much stronger is Titebond III 
> than hot hide?
>
> Not often do I choose an adhesive based on it strength. More often the 
> choice is made on characteristics such as gap filling properties, set-up 
> time, clean-up ease, color, viscosity, etc.
>
> Most good quality adhesives, when used properly, are more than adequately 
> strong for most applications.
>
> Terry Farrell
>
> ----- Original Message ----- 
>>I read the same article.  Before passing judgement on Hot Hide Glue, go to
>> Bjorn Industries, and check the dozen or so Hot Hide Glues they 
>> manufacture.
>> It's available in 5 lb. lots. As I understand, some of it is very strong.
>> What's commonly available is a small percentage of what you can get.
>> Paul Chick
>> Subject: glue strength
>>
>> Hello List,
>>
>> Interesting reading in the most recent Fine Woodworking magazine.  The
>> editors tested the following glues:
>>
>> Type I PVA (Titebond III) 100%
>> Slow-Set Epoxy  99%
>> PVA Glue (Elmer's Carpenter's Glue)  95%
>> Liquid Hide Glue  79%
>> Hot Hide Glue  76%
>> Polyurethane Glue  58%
>
>
>
>