The Swedish term "impregnera, vattentät" matches the English term "waterproof"

other swedish words that include "impregnera" : english :
impregnera, genomdränka impregnate
impregnerat trä impregnated-wood
other swedish words that include "vattentät" : english :
vattentätt skott bulkhead
tillförlitlig, vattentät watertight