"As far as water goes. I don’t think it would be a stretch to find some kind of liquid sealer to add to the silk. Either a top coat or infused with the material."
I doubt even that would be needed...the ballistic panels made of spider silk can be sheathed inside a vest made of any type of waterproof material..
even with Kevlar, that's how it is...the panels can be removed and the outer layer of material can be periodically washed...
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