Originally Posted by D Mainwaring
salt destroys the pores of the Goretex.
I may be wrong ( but i dont think so)
Pores are just holes in the fabric, many many times smaller then a water droplet, so water vapour can pass through, not water drops though.
To that end you cant destroy a hole, you can block it or make it bigger. Salt will block the pores, as will sweat, dirt, or many other things. you need to wash goretex regularly to maintain performance.
In addition a new goretex jacket will come with the outer fabric having a water replant coating to allow the water to "bead" off, over time this gets washed off to the outer nylon/cordura fabric starts to hold water, making it look like the garment is no longer waterproof. The gortex layer is unaffected by this and the garment reamins waterproof.
You should wash it in a re repellent solution periodically to allow the beading to re occur this stops the outer soaking up water.
I don't believe WL Gore use different bonding agents to stick the goretex to the nylon (i could be wrong), however to my knowledge the actual goretex fabric remain waterproof even if it de laminates from the nylon.
There is an old wives tail about marine goretex and non marine goretex.