sure equal volumes rather than weights. Or, in the case of
urethanes, they may not realize that if you don’t clear the
headspace on the activator side, that activator will begin
to absorb moisture from the atmosphere and start to go
bad on you.”
As a result, he says, these giant, money-saving bulk
orders can suddenly become giant liabilities. If used in
assembly, this could mean parts pulling apart in shipping
or in the hands of the customer, which leads to returns,
complaints, and lost business.
Even more concerning, if used by maintenance, repair,and operations (MRO) personnel, this could mean failures in critical repairs that keep machines running andworkers safe.
This, of course, is an extremely serious issue across theboard, but it is also an extremely preventable one.
“I’ve had more calls than I care to remember where
people say, ‘Hey, your adhesive is failing!’” Eichacker
says. But after inspection “it becomes evident that the
reason the adhesive is failing has nothing to do with the
adhesive itself, but rather how it’s being handled.”
So what is the solution here?
For the production users, there’s the technology option, of course—upgrading to automated machines thatcan provide the perfect mixes right on the line where it’sused (and ensure proper care of the components betweenuse, too). But for the MRO user, this kind of investmentwouldn’t be nearly as effective.
“People that are responsible for maintaining factories
are challenged and under pressure to make quick repairs,”
Eichacker says. “So how can we support them by giving
them solutions at their fingertips, in their toolboxes, that
are convenient, fast, and reliable?”
The answer to that puzzle comes in the form of an en-
tirely new line of products and delivery system that are
custom-built for these users: GorillaPro.
THE ADHESIVE SOLUTION
Combining H.B. Fuller’s 100+ years of experience increating adhesives with Gorilla’s well-known and highlyrespected brand resulted in a line of adhesives that waspowerful enough to keep plants in operation and its people safe, but also mobile enough to be on-hand wheneverit was needed, wherever it was needed.
The result of these efforts is a new product line for theMRO market. This line includes the EP3, EP5, and PU5,each of which offers their own set of unique characteristics and capabilities to meet the challenges these workersface.
First, the EP3 “Extra Fast Setting Epoxy” is a two-partstructural adhesive that offers a work time of 3 to 5 minutes and settles to provide “several hundred psi bondstrength within 15 to 30 minutes in the consistency ofsyrup,” Eichacker notes. After a full 24-hour cure, EP3will provide between 1,500 and 2,500 psi lap shear valueon clean and de-oxidized aluminum-on-aluminum applications. It is marketed as an ideal solution for repairsand bonding to a range of stone, metal, ceramic, plastic,and wood surfaces and can also be used on certain glassor carbon fiber applications.
The EP3 epoxy is the solution for ideal situations—nice, clean, horizontal surfaces that fit together in aperfect, uniform bond line. But in the MRO business, ofcourse, things aren’t always quite so ideal.
“Epoxies love about 0.010-in. bond line, but that’s not
always possible,” Eichacker explains. “So when we get a
variable bond line or irregular surfaces, or something
that’s on the vertical, we go with EP5.”
Like the EP3, the two-part EP5 epoxy offers a fast-set-
ting and a strong hold on a wide variety of material sub-
strates. But this product also includes a thixotropic filler
that provides a thicker mix that is ideal for those less than
“What the thixotropic filler does for us is fill in regu-
lar gaps without running or dripping out,” Eichacker ex-
plains. “Also, if you put it on a vertical surface, it’s not go-
ing to immediately run or wick away, and if you squeeze
something against it, it’s going to stay put.”
This additive also provides extra impact resistance and
more flexibility when dealing with shear loads that would
split apart pieces adhered with normal epoxies. This pro-
vides a mix that can act as a gap-filling adhesive for truly
heavy-duty applications, from electrical to industrial fix-
tures where impact and vibrations are a concern.
And finally we have PU5, the only polyurethane in themix. Like the EP3 and EP5, the PU5 offers a fast setting,strong enough for mild handling and clamp release within an hour and a full set after 24 hours. What sets this oneapart, though, is the flexibility it provides.
“Where urethanes do really well is on peel strength,
The entire delivery system for the EP3, EP5, and PU5 products is contained in a single, two-part foil pack containing both the resin and hardener,which simplifies maintenance, repair, and installation operations and eliminates the potential for mixing errors. (H. B. Fuller)