It’s a myth that if you plan to gel coat over a repair, you must make the repair with polyester. We’ve used gel coat over epoxy for decades, shown it in our instructional videos on repairing fiberglass boats, and discussed it in past issues of Epoxyworks. Continue reading →
On January 1, 2015, we began selling a new WEST SYSTEM Epoxy pigment. We already had the 501 White Pigment and the 503 Gray Pigment, so it seemed right to introduce our new 502 Black Pigment. Just like the 501 and the 503, it alters the color of the epoxy mixture without affecting the cured physical properties. Similarly, the maximum acceptable loading is 3%. This is great for hiding a surface with a single coat of black epoxy. Adding more pigment will increase the opacity, but can skew the mix ratio because there is epoxy resin in the pigment. Continue reading →
Here at GBI, we’re not just your average epoxy “retailer.” We are the leading provider of quality epoxy products and services. Quality epoxy as in; we dream a big, sticky, epoxy dream, research it, develop it and produce it. Service as in; packed within our 20,000(ish) square foot walls is a wealth of knowledge and experience so vast that it has enabled us to educate hundreds of people worldwide on the features and benefits of West System® epoxy. Spanning from A to Z….Alaska to Zimbabwe. . Yeah, I know. Alaska. Mind. Blown. Continue reading →
An epoxy fairing compound should be of a consistency that can be troweled onto a surface without sagging. Add 407 Low Density or 410 Microlight filler to mixed epoxy, checking the consistency as you stir in the filler to determine if the mixture has the correct viscosity for your application.
G/5 Five-Minute Adhesive is a fast curing two-part epoxy that allows 3-5 minutes of working time. It has an ideal viscosity which allows it to penetrate porous surfaces yet is viscous enough to bridge gaps when gluing broken objects. It adheres to a number of surfaces including wood, ceramic, metal, leather, plaster, stone, fiberglass, glass, cork, some plastics, and paper. G/5 is an excellent choice for quick repairs around the house, high-end crafts, and much more. Continue reading →
Because a newer epoxy formulation we offer is great for aluminum adhesion, we stopped offering the 860 Aluminum Etch Kit in the WEST SYSTEM product line in 2015. Before making that decision we ran a series of tests that compared bond strength of 105 Resin/206 Hardener and G/flex 650 Epoxy on aluminum surfaces prepared a variety of ways. As usual, we used the PATTI (Pneumatic Adhesion Tensile Test Instrument) to test aluminum adhesion. Continue reading →
For some sailors, there is a common maintenance ritual that occurs every spring—repairing the ballast-hull crack or cracks where the leading edge of the ballast keel meets the hull. This annually reoccurring crack is sometimes referred to as a “Catalina Smile” because it often occurs on Catalina sailboats. But we’re not here to pick on Catalinas because ballast-hull cracks are hardly exclusive to them.
The crack can form due to a number of causes but probably the most common reason is the hull isn’t as stiff as when it was new. Continue reading →
Surcease is a late ’50s International Flying Dutchman Class sailboat. The Mahogany hull was cold-molded in Holland and imported by Paul Rimoldi of Miami Florida. Mr Rimoldi made everything else, including many pieces of hardware. He raced the boat on Biscayne Bay into the ’60s and sailed it for many years. He rebuilt the boat in the late ’80s but died before he finished. We bought the boat in August 1992 from his widow and sailed it for almost a season before we discovered that the hull was in very poor condition; the Urea-resin glue between the veneers had begun to turn to dust. We stored the boat and bought another Flying Dutchman. Continue reading →
I often get calls from a customer asking if his leftover epoxy can be used for some small project around the house. The answer is yes, of course! Here are three projects, including a couple of different door repairs, that are perfect examples of what you can do with those partial cans of WEST SYSTEM® resin and hardener.
Controlling exotherm (the heat released by the chemical reaction between resin and hardener that cures epoxy) is very important, especially when mixing larger batches of resin and hardener. If not controlled, epoxy’s exothermic reaction can be dangerous.