From Pathfinder Rage of Elements, which isn't enabled.

Waterproof

SPELL 2

Traditions arcane, primal

Cast

Range touch

Targets 1 object up to 10 Bulk

Duration 1 hour

You prevent the target item from taking on water or becoming wet for the duration of the spell. The hydrophobic properties of the spell also grant resistance 10 to acid and a +2 bonus to saves and DCs against damaging effects with the water or acid traits.

Heightened (4th) The duration is 1 day.

Heightened (8th) The duration is unlimited.

Pathfinder Rage of ElementsOGL