VIDEOClick to see full answer. Also know, how do you stiffen fabric permanently? Mix equal parts of glue and water together in a bowl or bucket, depending on the amount of fabric. Immerse the fabric into the glue and water mixture thoroughly. Lay the fabric on a work surface and drape or form the fabric into the shape you desire. how do you stiffen fast? instructions: Form fabric to desired shape. Protect work area from overspray. Spray 6-8 inches away from project until wet. Let dry approximately 1 hour or speed dry with hair dryer 6 inches away from surface. For stiffer results, spray fabric again after it completely dries. Just so, can I use Mod Podge on burlap? Cut the burlap to size. Using a foam brush, apply a liberal layer of Mod Podge to the furniture surface. Once it’s dry, put another layer of Mod Podge over top of the burlap to seal and protect it. The burlap will be very stiff when it’s completely dry.Does Mod Podge stiffen fabric?Result: Not used for decoupage; instead, used to stiffen (primarily) fabrics into 3D shapes. Mod Podge Super Thick Gloss: You can’t glue with the Super Gloss; the goal here is to get a smooth, epoxy-like finish over a large area.