Thread Heaven® reduces fraying and tangling in any thread, but is particularly effective for taming hard-to-use threads like silk, rayon, metallic threads and blending filament. 

• Coating thread with Thread Heaven® serves a double purpose: to make it easier to complete your project AND to increase the lifetime of your finished work.
• Thread Heaven® will last longer if it is periodically removed from its box and turned over to expose a clean surface. You may need to use the tip of your scissors to gently pry it from its box the first time, after that, it will be easy to remove. Turn it on its side and press it back into the box leaving the surface slightly above the rim. http://www.sonic.net/~adambead/ for more info