Category Archives: Bonding

On the left is a typical propane torch flame. On the right is one with a flame spreader attachment. The highlighted sections indicated the optimal zone for flame treating plastics.

Flame Treating Plastics

Above: The highlighted sections indicated the optimal zone for flame treating plastics. On the left is a typical propane torch flame. On the right is one with a flame spreader attachment. 

by Terry Monville – GBI Technical Advisor

It’s no secret that bonding to plastic can be a challenge. Identifying what type of plastic you are working with—ABS, PVC, HDPE, LDPE, UHMWPE, and this list goes on—is your first step. Continue reading

Joining Plywood with epoxy

Joining Plywood

By Don Gutzmer – GBI Technical Advisor

Many boat parts require plywood lengths greater than the standard 8 feet, so joining together two panels of plywood is an important step. The most common methods of joining plywood are the butt joint with backer block, the scarf joint and a hybrid between the two. Each method offers its own distinct advantages and disadvantages in certain applications so it’s important to be aware of each joining method. Continue reading

faster, neater fillets

Faster, Neater Fillets

By Tom Pawlak — GBI Technical Advisor

When creating lots of epoxy fillets, a faster way to apply the thickened epoxy is with an 810 Fillable Caulking Tube. It takes a bit of time to transfer the epoxy into the tube, but it is wonderfully efficient for applying epoxy to the joints. Compared to other application methods, it’s also less messy. Continue reading

modified 808 spreader filleting tool

Bonding with Epoxy Fillets

By Tom Pawlak — GBI Technical Advisor

Building with epoxy fillets is especially beneficial when attaching bulkheads to hull sides, attaching hull sides to hull bottoms where the faces of the plywood are coming together at ever-changing angles. Gluing plywood structures together with epoxy fillets saves considerable time constructing the joints and reduces the overall weight of the structure compared to more traditional methods using wooden cleats and screws. The strength and gap-filling qualities of epoxy eliminate the need for precisely fitted wood cleats that otherwise require time and skill to create. When gluing with conventional adhesives, that are non-gap filling such as resorcinol glue, wood cleats need to be well fitted, need to be wide enough to provide sufficient glued surface area, and provide enough thickness for screws to be driven into. Continue reading

Cold Weather Bonding

By Don Gutzmer – GBI Technical Advisor

“Whats the lowest temperature WEST SYSTEM Epoxy can be applied?” During cold weather, this is a common question our Technical Advisors are asked. Fortunately, its one were well equipped to answer. Gougeon Brothers, Inc. got its start in the world of DN Iceboat racing. Both Meade and Jan Gougeon have won multiple DN cup races worldwide. Its not unusual for an iceboat to need repairs mid-regatta, so part of the discipline of iceboat racing is getting epoxy to cure despite cold working environments. The trick is using strategies that bring epoxy temperatures up to adequate cure levels in cold working environments. Continue reading

Aluminum Adhesion

By Tom Pawlak — GBI Technical Advisor

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

Will It Stick?

By Mike Barnard

Many times each day we get questions about sticking to various substrates.  Most questions are on something that we have already tested, so we check our large database and advise on how best adhere to the surface.  Other times the request is unique and we are unsure if WEST SYSTEM® Epoxy will stick to it or not.  In the event we do not have any experience bonding to a material, we recommend testing adhesion.  Many times this means gluing a wood block to the surface, then pulling the Continue reading

What you can do if you don’t want epoxy to stick

By Bruce Niederer — GBI Technical Advisor

We spend a good amount of time doing everything we can to inform our customers how best to make WEST SYSTEM® epoxy stick to wood, metal, and even plastic, or underwater with the introduction of  G/flex 650 and 655.  Still, there are many instances when you don’t want the epoxy to stick to one surface or another.

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Getting the Most Out of G/flex®

By Julie Jezowski

Are you the kind of person who just can’t get enough of a good thing? Looking for a better way to squeeze out that last little bit of G/flex adhesive from your tube rather than resorting to pliers, a vise or maybe even Grandma’s rolling pin? Maybe you’d like to get a fatter bead of adhesive or your tube is a bit clogged. Boy, do we have some easy and inexpensive tricks for you! Continue reading