Quote Originally Posted by DemostiX View Post
Laughs aside, Tyvek is olefin, heat-sensitive, and should not see a hot iron. Temps should not exceed 175F.

1.20oz / yd2 is the lightest Tyvek. Nylon would have to have a basis weight of 1oz before silicon treatment to be that light. No comparison in cost.
So someone does make lighter tyvek?