Check the listing for details. Green Stuff World: Green Stuff | Brown Stuff : 100g Bar | 36.5" Tape. Condition: New. Listed at 14.23 USD. Green Stuff World: Green Stuff | Brown Stuff Green Stuff Type: 100g Bar or 36.5" Tape Composition: Two-part epoxy putty (blue and yellow parts) that forms a green putty when mixed. Workability: Flexible and sticky easy to sculpt fine details. Can be smoothed with water. Cure Time: Workable for several hours fully cures in 24 hours. Uses: Ideal for sculpting intricate details organic shapes and flexible parts like capes and banners. Brown Stuff Type: 36.5" Tape Composition: Two-part epoxy putty (grey and white parts) that forms a brown or grey putty when mixed. Workability: Less sticky and more rigid better for carving and sanding once cured. Cure Time: Similar workable time of a few hours fully cures in 24 hours. Uses: Better suited for creating harder sharper edges mechanical parts and non-organic shapes.