up FAQ: Are there any downsides to using 303 Protectant on sailcloth?
303 Protectant will soften some of the resin finish with which the Dacron is treated at the factory to give it stiffness. Some racers consider this a negative. Others report increased performance from 303 treated “softened” sails: 1) That with treated sails you can point several degrees higher into the wind and 2) That the reduced drag co-efficient of treated sailcloth adds measurable speed. 3) That sails are much easier to bring in and store at the end of the day.
