Category Archives: Bonding

oak

Using Epoxy with Oak

Editor’s Note:

This article about epoxy and oak was originally published in early 1995, and is shared at Epoxyworks.com for historical purposes. A dozen years after this article was written, we developed G/flex epoxies, which are rubber toughened to withstand shock, vibration, expansion and contraction. G/flex epoxies adhere tenaciously to many difficult to bond substrates, including dense and oily wood species like oak.  Continue reading

Low-Tech Adhesion Testing

By Jim Derck

Before beginning a project, it’s a good idea to test the adhesion between epoxy and the materials to be used. Preliminary adhesion tests can help you choose the best materials and surface preparation methods. It can also help to avoid a surprise bonding failure.
At Gougeon Brothers, Inc. we use a Pneumatic Adhesion Tensile Testing Instrument (PATTI) for adhesion tests. After the PATTI test stud is bonded to the test surface, the stud is pulled in tension until it releases. The instrument gauge gives a precise pounds per square inch reading at failure. Continue reading

Bonding PVC Plastic with Epoxy

Editor’s note: This article was originally written in 1994, long before we developed G/flex epoxies which offer vastly superior performance in bonding to plastics including PVC. A much more current article on this subject is Gluing Plastic with G/flex Epoxy by Tom Pawlak and Jeff Wright. If you’re interested in gluing PVC with epoxy, we suggest you start there. The following article is published at Epoxyworks.com for historical purposes only.

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Use Release Fabric for Smooth Fillets

by Jim Derck

Our 403 Microfibers and 405 Filleting Blend are excellent structural fillers but they’re fibrous and leave a rough surface when used to make fillets. To end up with a surface that is ready for coating or re-bonding without having to remove amine blush or sand smooth, apply a narrow strip of 879 Release Fabric after the fillet is made. Continue reading

cold-temperature bonding

Cold-Temperature Bonding & Coating with Epoxy

Strategies for successful application and curing of epoxy at low temperatures

Epoxy behaves differently in cold temperatures. These handling tips can guide you in obtaining optimum performance from epoxy in this fall and winter.

Epoxies reach a higher percentage of their potential physical properties when mixed and applied at temperatures above 60°F. However, you can use epoxy at lower temperatures and still obtain a dependable bond. The key is adapting your handling and application techniques to cold temperatures. Whether you live in a Northern or Southern climate, it is helpful to know how temperature affects epoxy chemistry, how epoxy handles differently in cold conditions, and what steps you can take to assure dependable bonds in cold weather. Continue reading