I would look into Sugru. Epoxy may have some residual substances which are not really skin-safe. Sugru comes in two formulars, one classic one and one which is marketed as "Family safe" and skin-friendly (the FAQs state family-friendly should be used "[...] in applications where there will be prolonged contact with skin either in its uncured or cured form [...]"). And as it is a silicone, it should be water resistant and, at least for pool use, chlorine resistant.
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