10 yr old bmw street guard and pants which are both Gortex bonded. pants are still totally waterproof. Just Nikwax washed and then Nikwax Direct washed. 3 time and the jack sheds water like new.
After recent wet rides in my leathers, i purchased some bees wax. Comes in a cake like soap which you rub on and then melt in with a heat gun. Took 2 goes to get all the white to absorb, but works so well I’ve done my winter gloves.