GENERAL DISCUSSIONS > Other Tools & Accessories

Titebond III vs Gorilla Glue?

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Matthew Schenker:
Everyone,
I've been using Titebond III extensively in the past couple of years.  I like its long open times and waterproof qualities.  Even if I don't need a project to be waterproof, the glue is great.

I've heard so much about the great qualities of polyurethane glues, I decided to do a side-by-side test. of Titebond III and Gorilla Glue.

I face-glued several pieces of 3"-long by 1.5"-wide scraps of poplar, forming two blocks 3" wide X 6" long X 1.5" thick.

After clamping, I let the blocks cure for three days.  I did not scrape away the squeeze-out.

For the test, I took each block and slid it along my workbench until a 1.5" portion was hanging over the edge.  Then I whacked the part hanging over the edge with a hammer.  I did this several times on each block, observing where the wood split.  OK, I don't win any awards for elegance, but I was just curious to get an answer.

The results amazed me...

With the Titebond III glue-up, it split on the solid wood every time, with chunks of splintered wood stuck securely to the glue line.

With the Gorilla glue, nearly every piece broke nice and clean, right on the glue line!  It was actually pretty easy -- I could whack it more softly than the Titebond III and still break the bond.

I prepared the surfaces just the way the instructions recommend -- misting it a bit with water.

Am I missing something here?

Matthew

Dick Latshaw:
Nope. You're not missing a thing. TB III was the big winner in the recent FWW glue test. I even used TB III on my recent Domino Z Chair (although David still thinks epoxy is the way to go). So far the chair is doing fine.

James Metcalf:
Gorilla glue has a much shorter shelf life than Tite bond III.The first thing I do when buying glue is to write a date on it. When the date is a year old, it goes in my trash. Even when you date it, you do not know how long it was in stock before you bought it. Tite Bond puts a date on their glue, but you have to be able to read the code.

Michael Kellough:
The chief value of the polyurethane glues is gap filling due to the high expansion characteristic.

Rocker:

--- Quote from: Michael Kellough on August 08, 2007, 11:44 PM ---The chief value of the polyurethane glues is gap filling due to the high expansion characteristic.

--- End quote ---

Michael,

I believe this is untrue. Although polyurethane glues will fill a gap due to their foaming property, the gap is mainly filled with air bubbles, which obviously have no strength. As I understand it, the glues that are gap-filling and strong are epoxy, urea formaldehyde, and resorcinol.

David

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