Introduction
Often times it is difficult to create a waterproof electrical connection that will survive underwater. Traditional methods include potting, which takes a long time to set, or using underwater connectors, which can be expensive. Through much lab and field testing we have found that connections can be done in a short amount of time and in a cheap way using adhesive lined heat shrink. These steps will walk you through the process.
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You are going to want to cut each piece of heat shrink so it is about 5mm longer than the solder joint on either side
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It is best to tin each wire before joining them.
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You want to avoid sharp points on your solder connection, or frayed wire.
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Set your heat gun temperature to at least 250°F (121°C).
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Make sure the inside lining is completely melted and oozes out each end.
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