I was chatting about parachutes with a mate the other day and he came up with the idea of water proofing a chute using the waterproofing agent you put in cement . Either dilute and spray on or dilute in a water butt and give the chute a good dunking then spread out to dry. If this is feasable or not coz if it is it would much cheeper than using more conventional tent reproofer type of stuff . Your opinions please!!!