Armacell - Tubolit Self-Seal is a 25/50-rated flexible black polyolefin/polyethylene pipe insulation for saving energy while reducing noises. Particularly effective for cost-efficient thermal insulation of domestic heating and plumbing lines. It is available pre-glued on both sides of the seam in the most frequently specified pipe sizes and thicknesses. Tubolit SS is expanded without the use of CFCs, HFCs or HCFCs. It is also formaldehyde free, low VOCs, fiber free, dust free and resists mold and mildew.