N-40B is a single-sided Metalized PET tape.
Specifications:
• Thickness: N-40B =0.04 mm, N-60B = 0.06mm
• Elongation: N-40B = 70%, N-60B = 90%
• Adhesive: Acrylic adhesive
Applications:
• Conformable metalized Polyester backing offers good insulating and waterproofing applications, like air ventilation pipe sealing and ducting.