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How to Make and Use Quilted Waterproof Fabric

Quilted waterproof fabric is a type of quilting fabric that has been treated to be water-resistant. It is typically made of synthetic materials, such as polyester or nylon, which are resistant to moisture and water and can help protect against rain and other wet conditions. These fabrics are used in a wide range of applications, including making decor items like draperies and shower curtains, as well as clothing and other accessories such as raincoats. They can also be used to make tents and outdoor gear such as backpacks.
Waterproof fabric is very versatile and comes in many different thicknesses and weights. Some, such as the popular Gore-Tex fabrics, are thin and lightweight and perfect for garments that need to be packable, like cagoules and ponchos. Other fabrics, such as laminated cotton and oilcloth are thicker and more structured, and better suited to jackets or coats. There are also a number of different ways to finish a piece of waterproof fabric, from adding a seam sealant with a special applicator to using French seams to ensure no water seeps in at the stitches.
There are a few different methods for making your own waterproof fabric, but one of the most common is to use alum powder. Alum is an alkaline substance that can be purchased in a number of grocery and craft stores. Mix alum with turpentine, and apply the solution to both sides of the waterproof fabric, leaving it to dry. This method is very effective, but it does require some safety precautions. Turpentine can be toxic if inhaled, and it is best to work outside or in a well-ventilated area.
Another easy way to make waterproof fabric is to use a polyurethane laminate or PUL. PUL fabric is a layer of polyester fabric that has been coated in a layer of polyurethane. This makes it a great choice for making raincoats and other apparel that will be worn outdoors, as it is not only durable but also allows heat to escape to regulate body temperature. PUL fabric is available in a wide variety of colors and prints, so you can find the perfect option for your next rainy-day project.
When working with waterproof fabric, it is important to avoid using pins, as they will pierce the surface and leave tiny holes that can let in water. Instead, it is best to use pattern weights or clips to hold the fabric in place. It is also helpful to use a sewing machine with a shorter stitch length to prevent the needle from punching through the fabric. If you need to mark your fabric, try using chalk or a washable marker rather than a pencil.
It is also a good idea to press your fabric with an iron, but only on a low setting. Overheating the fabric can cause it to melt, so be sure to move the iron around constantly and not let it rest in one spot for too long.