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Using Epoxy - Fly Tying Tutorial
Article and photos by Blake Davis
||Despite having a reputation as a finicky material, epoxy remains an essential
component to many saltwater flies. It can be used as an adhesive, a clear coating, and as way to
add weight to a fly, among other uses. Although many alternatives exist, few are as
durable and versatile, and the proper use of epoxy continues to be a very important technique for saltwater fly tiers.|
While there are many epoxy kits available for fly tiers, I prefer to assemble my own materials
as they are quite cheap and easy to obtain. The following list includes tools to mix, apply, and
cure epoxy, though you can adapt your method to use whatever is on hand. Here is what you will need:
Most epoxy is rated by its working time, or the
amount of time you have to manipulate the mixed epoxy as it cures and becomes thicker. As it applies to fly tying, this working time is almost always shorter than advertised, and the only way to gauge how long it takes for an epoxy to cure is to mix a small batch. Most epoxies fully cure overnight.
- two-part epoxy product
- index cards or Post-it notes for mixing
- bodkin or similar tool for mixing and applying epoxy
- fly drying/turning wheel
| Fly tiers typically use "one-minute" to
"30-minute epoxy", reserving those with shorter working times as an adhesive for eyes and other
fly accessories, and those with longer working times as a durable coating. Unless you need a
strong adhesive, or have no way to rotate the fly while it cures, I recommend 30-minute epoxies, not only because of the longer working time, but because they are less prone to the discoloration that can occur when cured epoxy is exposed to sunlight.
Mixing Epoxy (Steps 1 to 5)
|Step 1: Begin by labeling the upper corner
of your index card or paper slip. If you are making multiple batches, this will help you monitor
which epoxy batches have cured. Make sure to have your bobbin, toothpick, or other mixing
implement close at hand and a clear workspace. |
|Step 2: Squeeze out equal portions of the
two epoxy resins, each amount approximately the size of a quarter. Unless otherwise indicated in
the instructions that accompany your epoxy, most epoxies use a fifty-fifty ratio of two
resins that react to form a durable plastic polymer.
One of these resins typically has a yellow hue and a slightly thinner consistency, while the other
tends to be clearer and thicker. To ensure equal portions of each, some tiers pre-measure the
resins in small plastic cups. I prefer to eyeball each amount, taking into account
each resin has a different consistency.
While you can mix less epoxy than is shown, using a larger amount gives you a greater margin for
error. Essentially, your proportions can be off by a fair amount but the epoxy will still cure properly, which is
not necessarily true when starting with smaller amounts.
|Step 3: Using a bodkin or other mixing
implement, begin moving the epoxy resin from the outside of the epoxy "pool" into the center
(Note: Toothpicks, coffee straws or stirrers, and other disposable mixing tools are often not a good choice, as they can break, or are too short to work with, which can end up creating a mess. Using a dedicated bodkin with a strong handle will help make this job much easier. Just remember to clean this tool well by wiping it with a paper towel or small rag each time you're finished mixing & applying a batch of epoxy). Work your way around the outer edge and continue pushing resin toward the center, being careful not to stir in air bubbles by working too quickly.
Step 4: After about half a minute of pushing the resin into the center, begin moving the bodkin in a
circular pattern, again moving slowly to avoid air bubbles. If you are careful, you will need to
spend no more than an additional minute mixing. As the resins mix and begin to react, the epoxy
mixture will become cloudy. This is temporary and the epoxy with soon clarify.
Step 5: After a maximum of two minutes mixing, your epoxy should be ready to apply. There
should be no streaks caused by unmixed resins, and the cloudiness that once appeared should no
longer be apparent. As the epoxy cures, you will notice the material near the center of the pool solidifies more quickly than the edges. Keep this in mind later when you are applying the epoxy, as the material from the center of the epoxy pool is almost always better mixed.
How to apply epoxy >>
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