On Sun, 15 Aug 2004 23:09:52 +0100,
(D.M. Procida) wrote:

What can I do to make a parachute a little more impermeable to rain?
I've got one arranged over the hammock in the garden.

Silicone oil. Sold as waterproofing agent in camping shops - looks
like water and won't affect the material properties.

I don't want anything that will spoil its lovely soft billowing, and it
doesn't have to be completely impervious.

Unfortunately the billowing will make the waterproofing less
effective over time.

--
Peter Parry.
http://www.wpp.ltd.uk/