Odicoat is one of the best waterproofing products I have every used. This picture was taken on a very rainy day in Seattle!!
Once the fabric is coated it is truly waterproof, with amazing movement. AND it is very easy to sew too!
This 8.68 oz container will coat 1 yard of fabric twice, which is highly recommended. I use a foam brush to apply. It comes with a credit card like spatula that helps spread it out, then finish to coat with the foam brush!