Most outdoor cushions are made with synthetic fabrics (i.e. fabric that contains more than 35% polyester, acrylic or acetate). As a general guideline, one bottle of Rit DyeMore will dye one pound of fabric.Click to see full answer. Also, can I dye my outdoor cushions?If the cover can be removed, you can consider dying just that, but remember that most outdoor cushions are designed to withstand the elements, and so the fabric may have been treated in a way that makes it impossible to dye with ordinary dyes you can get from your local craft shop.Also Know, can waterproof fabric be dyed? Most waterproof fabrics have an outer Durable Water Repellent coating that blocks liquids and dye from penetrating through the fabric. So, the short answer is No. You cannot use dye on waterproof fabric. One may also ask, can you dye outdoor furniture fabric? Dyeing outdoor fabrics seldom works well because dyed fabric is not colorfast and will lose its color in the rain. Instead of coloring outdoor fabrics, paint them. You can paint them a solid color or add designs. Either way, you will be adding your own personal color and design to the outdoor fabrics in your home.Can you dye polyester cushion covers?Ok, so polyester is a harder fabric to dye than regular cotton. You must dye polyester fabric on the stovetop, using high heat. A big pot is a must to fit the covers.