Super Glue and Epoxy Test

Super Glue and Epoxy Test

Super Glue vs. Epoxy

Your product design directly impacts its quality. If something is well-made, people will buy it. Your products and their packaging may require bonding, and you may use Super Glue or epoxy. Which is better for the job? Honortronics conducted a glue strength test to help you decide.

Glue 1 #1 Overview
This glue was the only one that had a "perfect" score on the strength test and is the third most affordable per ounce of all 15 tested. It is clearly the winner.
Glue 2 #2 Overview
This glue got a very good score in the strength test and is still reasonably priced. This glue claims to be earth-friendly, so this adds a degree of value.
Glue 3 #3 Overview
This glue got a very good score in the strength test, but is a little more expensive than the glue above.
Glue 2 #4 Overview
This glue got a very good score in the strength test, but is a little more expensive than the glue above.
Glue 15 #5 Overview
This glue got a very good score in the strength test, but is almost twice as expensive as the glue above.
Glue 8 #6 Overview
This glue got a very good score in the strength test, but is almost five times as expensive as an equally performing glue.
Glue 3 #7 Overview
This glue got a decent score on the strength test, but is one of the highest priced glues tested.
Glue 14 #8 Overview
This glue did not perform nearly as well as the version above (that did not have the Skin Guard) on the strength test, yet it is the same price as the one above.
Glue 9 #9 Overview
This glue did not do very well on the strength test at all.
Glue 10 #10 Overview
This glue did not do very well on the strength test either, yet it costs a little more than the glue above. Despite the results, the convenience that this packaging offers definitely adds value.
Glue 11 #11 Overview
This glue did poorly on the strength test but is less expensive than the glue below.
Glue 12 #12 Overview
This glue also did poorly on the strength test and is over twice as expensive as the glue above.
Glue 13 #13 Overview
This is the best performing of the epoxies, but this version still failed miserably.
Glue 11 #14 Overview
This is the only glue that began to separate itself before being tested. If the glue below did not completely fail the strength test, this would have been the one that failed the most.
Glue 15 #15 Overview
This is the worst performing of all of the glues. It was the only one that completely failed the strength test. It is expensive to boot, so this one takes honors at the bottom of the list, and is clearly the loser in this experiment.


Basis for Experiment

The following is a completely independent assessment of every name brand of Gel Super Glue or epoxy that advertises to bond plastic on their packaging that is available in the general Houston area. There were 15 samples tested from 9 different glue manufacturers as detailed below:

1. Loctite x 6
2. Krazy Glue x 2
3. Gorilla
4. Chemence, Inc.
5. Scotch/3M
6. Kwik-Fix
7. The Original Super Glue
8. SureHold
9. Devcon

Objective
To get an LED strip/stick to adhere to a piece of plastic-based glass

Notes
The chemical composition of both the LEDs and the glass are unknown. This will be a commercial application, so durability and price are the paramount criteria. The prices were taken from the smallest commercial sizes available, so they may not reflect price breaks given for the volume discounts in a production environment. Epoxy-based glues are not appropriate for this type of application, judging from the results. This is not to say that they would not outperform Super Glue in other applications.

Glue Strength Test
The strength test was the primary criteria for ranking the different glues.


Ranking
A ranking from 0 (lowest) to 5 (highest) was used to classify the bond.

Basis for Rank
An LED stick has 12 LEDs. If all 12 LEDs are bonded to the glass by the glue with enough strength to break the solder bond on the circuit board before breaking, that is considered a perfect score. If the LEDs are not bonded to the glass and are removed, the resulting residue is inspected for firmness and shininess to determine how well it was attempting to adhere to the LEDs.

Test
The actual test was performed by suspending the glass assembly by the LED wires and then slowly adding weight (water) to the glass until the bond broke.

Bonding Test

Note
A passing score on the weight was considered over ~25 ounces of force, as that was when the solder bonds seemed to break. The resulting weight can then be measured.