Flexi Paint Flexi Filler - Black, 100g (3.5 oz) Flexible Crack & Seam Filler for Foam, Cosplay, Leather, Plastics Smooth, Sandable, Paintable Surface | Ideal for Costume & Prop Making Bring your creations to life with Flexi Paint Flexi Filler – the ultimate solution for achieving flawless finishes in cosplay, costume, and prop making. Specially formulated to remain flexible after drying, this black filler is perfect for sealing seams, smoothing surfaces, and repairing cracks in EVA foam, Worbla, leather, thermoplastics, and more.