Hello:

Seem to be seeing more and more ads these days for "Polyurethane Glues."

They claim that they are as strong as epoxies, but with the big advantage of
being only a single component.

a. Are they truely as strong as the typical two part epoxies like the
Devcon products in the double-syringe
packaging you see in all the hardwarfe stores ?

b. Pros and cons of polyurethane adhesives ?

c. BTW: Is this what that Gorilla brand of glue is ?

Thanks,
Bob

They bond close-fit surfaces as strongly as epoxy but epoxy has some other
advantages like faster curing, can cure in thick layers, does not expand.

Polyeurathane glues need some moisture in the bonded material and are
generally more flexible than epoxy when hardened. This may bond better to
some hard to stick plastics since epoxy often is too hard and brittle and
flakes off these materials.

Epoxies are available in a wide range of colors, curing times, hardnesses
and other mechanical properties.

Not better but different, choose your application wisely. Stuff is
excellent for bonding wood with a waterproof agent. but will not fill a
large void.

Don't waste your $ on Gorilla, buy a larger bottle of Elmers (brand) for
less $. It's almost exactly the same.


"Robert11" wrote in message
. ..
Hello:

Seem to be seeing more and more ads these days for "Polyurethane Glues."

They claim that they are as strong as epoxies, but with the big advantage
of being only a single component.

a. Are they truely as strong as the typical two part epoxies like the
Devcon products in the double-syringe
packaging you see in all the hardwarfe stores ?

b. Pros and cons of polyurethane adhesives ?

c. BTW: Is this what that Gorilla brand of glue is ?

Thanks,
Bob

Robert11 writes:

They claim that they are as strong as epoxies, but with the big
advantage of being only a single component.

Claims without concrete specifications of material properties are vacuous.

What are the respective properties, such as pull-off psi?

Robert11 wrote:
Hello:

Seem to be seeing more and more ads these days for "Polyurethane
Glues."

They claim that they are as strong as epoxies, but with the big
advantage of being only a single component.

a. Are they truely as strong as the typical two part epoxies like the
Devcon products in the double-syringe
packaging you see in all the hardwarfe stores ?

b. Pros and cons of polyurethane adhesives ?

Read here...
http://www.popularwoodworking.com/fe...ea.asp?id=1064

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dadiOH
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