Waterproof and water-repellent fabrics materials treated with various substances so as to make them impervious to water. Some examples are:
Gore-tex
Vinyl
Fluoropolymers
Not all types of calico fabrics are waterproof, but there are certain waterproof calico fabrics.
Some fabrics are waterproof while others are not. Some waterproof fabrics are:Latex or natural rubberGore-TexVinylFluoropolymers
Goretex
water
The best waterproof diaper fabrics for leak-proof protection and comfort for babies are polyurethane laminate (PUL) and TPU (thermoplastic polyurethane) fabrics. These materials are durable, waterproof, and breathable, providing a comfortable and effective barrier against leaks.
Permanent waterproofing is achieved by first coating fabrics with rubber or plasticized synthetic resins, then vulcanizing or baking them.
To ensure your sewing project remains waterproof, use waterproof materials like specialized fabrics and threads, and employ techniques such as seam sealing, using waterproof zippers, and applying waterproof coatings.
Waterproof fabrics are generally very difficult to sew and need to be stitched by machine instead of by hand. The same qualities that make the fabric resistant to water also make the fabric resistant to the needle and thread.
Umbrellas are not made from clothing, but from waterproof fabrics.
There are many comfortable, natural feeling options today for waterproof seat covers. Seat covers made out of "waterproof fabrics that are soft and comfortable" are available from SeatShield.com
This category includes establishments primarily engaged in manufacturing raincoats and other waterproof outerwear from purchased rubberized fabrics, plastics, and similar materials.
Searched "Waterproof fabric" on this craft/hobby guide that has a lot of companies who specialize in fabrics, etc., pulled up about 10 listings, hope this helps ultimatecraftindustrybuyersguide.com/results.php?search_type=keyword&term=waterproof+fabric&category=&heading=