Tag Archives: G/flex

Testing Epoxy to Determine Physical Properties

by Mike Barnard

In this article, I’ll describe our standards for testing epoxy and how we go about testing epoxy to determine its handling characteristics and cured physical properties.

Epoxy Testing Standards

These are the standards we follow no matter which epoxy we are characterizing.

Two-week room temperature cure

After proper metering and thorough mixing epoxy will continue to cure after it has solidified until all amines have paired up. Over years of testing epoxy, we have found that two weeks of curing at room temperature, which we define as 72°F (22°C), is a good indication of its full strength. Continue reading →

White Oak Redux

by Bruce Niederer and Bill Bertelsen

Building stuff, especially boats, with wood is much like a religious calling; once you hear the call, there’s no turning back. Those who’ve heard the call will not suffer fools willingly, so when I decided to conduct some white oak adhesion and shear testing and report the results in Epoxyworks 31, skeptics and believers alike took to the internet wooden boat forums-and had no problem speaking their minds! Having healed from the pummeling I took in some quarters, I’m back again to report the promised follow-up test results. Continue reading →

A G/flex Modified Snow Shovel

By Tom Pawlak — GBI Technical Advisor

I decided to modify my new plastic snow shovel with G/flex 655 Thickened Epoxy Adhesive. This winter (2011) in Bay City, Michigan, we’ve seen a couple of big snowfalls and lots of small ones with 1″ to 2″ of accumulation. Not enough snow to bother breaking out the snowblower, so I usually shovel it by hand. About 10 years ago I fell in love with the plastic snow shovels that are lightweight and the snow slides off of them easily compared to the metal snow shovels that are heavy and snow clings to stubbornly. Continue reading →

Building Iakos

For a Polynesian Voyaging Canoe

By Joe Parker

The John Williams Boat Co. (JWC) on Mt. Desert Island, Maine, recently a set of iakos for the Polynesian voyaging canoe Hôkûle’a, built and maintained for the Polynesian Voyaging Society. We sailors sometimes think of ourselves as adventurers and explorers, self-sufficient and capable of handling the vagaries of wind and weather. But our view of voyaging includes refrigeration to keep the food and drink cold, sail handling and navigation systems to make sailing easy and safe, and a good dry, comfortable boat so we remain content while sailing to the ends of our own personal world. When we compare that to the skills and equipment of early voyagers, it can be almost embarrassing. Continue reading →

So Stands the Mighty Oak

Testing Epoxy’s Adhesion to White Oak

By Bruce Niederer — GBI Technical Advisor

People have been building boats using white oak for centuries, sacrificing blood, sweat, and tears to engineer wonderful and enduring vessels of all shapes and sizes.

Oak was often used because of its desirable properties and behavior. It is dense, strong, rot-resistant, holds fasteners well, and can be steam bent. In the days before glues and adhesives, oak planking was used because it would swell considerably which resulted in tight and sound hulls, meaning little leaking and dry interiors. Of course, time marches inexorably forward, and eventually, builders began using adhesives to augment or, in some cases, replace mechanical fasteners.

We’ve been debating the issue of gluing oak ever since. Continue reading →

Repairing a Plastic Hatch with G/Flex

By Tom Pawlak — GBI Technical Advisor

A local sailor stopped by our shop with an old plastic hatch that was slightly warped and badly cracked. He hadn’t been able to find a similar hatch to replace it. He wondered if we had an epoxy that could be used to repair the hatch. I said G/flex would likely work but to know for sure we needed to do a bit of adhesion testing. Continue reading →

Make Your Own Soft Eye Pads

By Tom Pawlak — GBI Technical Advisor

If you look closely at some of the photos in the Bufflehead article, you will notice small eye pads (also called pad eyes) in strategic locations inside and outside of Hugh Horton’s Bufflehead. Hugh makes this lightweight carbon fiber or Twaron™ reinforced nylon line eye pads for his sailing canoes.

He glues them onto the decks or inside his sailing canoes—wherever they’re needed to hold supplies in place or hold flotation inside the hull. The eye pads are easy to make and amazingly strong. Continue reading →

Attaching Guide Lines to Fly Rods with G/flex

By Tim Veale

Above: A graphite composite fly rod with all of the guides attached with G/flex to maximize the rod’s flexibility.

Fly fishing, particularly for Atlantic Salmon, has been my lifelong hobby. The fly rod itself has an ancient past but its technical prowess as an instrument to launch line and fly to a designated spot on the river was epitomized by the arrival of handcrafted split bamboo rods in the late nineteenth century. Continue reading →

Plastic Engine Cover Repair

By Jeff Wright — Vice President of Technical Services

My wife’s 2000 Audi TT has a very sleek shape, and these smooth lines are carried under the hood with molded plastic engine covers that provide a very clean-looking engine. Unfortunately, when I was servicing a burned-out bulb, I attempted to remove the engine covers in the wrong sequence which caused a tab to snap off. Continue reading →

Camper Panel Repair

By Tom Pawlak — GBI Technical Advisor

Above: The repaired camper panel is back in place on the camper. A coat of Krylon Fusion® textured, plastic-compatible paint completed the camper repair.

Todd Lynch, one of our valued employees, brought in a damaged plastic panel from the back end of an 11-year-old pop-up camper and asked if it was worth fixing. It came from his hunting camper which had been rear-ended. He just wanted it to be functional. The impact had made cracks at nearly every screw hole for holding the panel in place, making it doubtful it would last another trip down the highway. Continue reading →