Voila comment faire, avec de la cire chaude... et en english
From stewmac.com:
Potting
Potting a pickup is a technique used to help eliminate unwanted microphonics. Some pickups are not potted from the factory. While it’s not necessary, potting is generally a good idea. Here are the common pickup potting materials.
Wax
Pros: Works for most pickups, it’s non-toxic, easy to deal with, cheap, and you can undo it if something goes wrong. Wax has a traditional appearance, and it works great for humbuckers with metal covers.
Cons: If the wax is too hot you can warp or melt plastic bobbins. If the wax is way too hot you have a potential fire on your hands! Make sure that the wax never smokes—that’s an indicator that it’s getting too hot. Never try heating your wax on the kitchen stove or in a microwave oven because hot paraffin, and especially paraffin vapors, can ignite. It’s best to wax pot outdoors until you have your methods refined and have eliminated any fire hazards.
Application: After a pickup has been wound, and the output wires are attached and assembled, suspend the pickup in canning paraffin mixed with 20% beeswax, heated to 145-150° Fahrenheit. After ten or fifteen minutes all of the bubbles should have risen out of the pickup, and all of the voids within the pickup should be filled with a coating of wax.
Pull the pickup out of the wax and suspend it over the wax pot letting the excess wax drip back into the pot. Then lay the pickup on a paper towel and allow it to cool to touch. Carefully remove any excess with a paper towel before the pickup completely cools to room temperature.
Stewart-MacDonald’s Hot Glue Pot (#066 has a thermostat designed to heat hide glue to about 145°. Keep the pot at least 2/3 or 3/4 full. It can operate with less liquid, but the wax may get too hot.
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