Defender Drivers take note - WET WEATHER GEAR REQUIRED. Don't know how so much water got inside - and once you're in the UB Spray booth, you can't get out till the doors open again

Other advice is to sweep out all the sand from inside the car since once the water starts to pour in it's impossible to sweep out till it's dried again -and we all know wet sand sticks to everything.

However, despite taking off the flaky underbody sealent, it also cleared the salt encrusted windows sufficiently for the drive home so it was worth it for that alone