3M 1339 | Glass‑Fiber Reinforced Tape | Insulating Use | Acrylic Adhesive

Product Description

The 3M™ 1339 Glass‑Fiber Reinforced Insulating Tape is a white, 6.45‑mil (0.164 mm) thick protective solution. It consists of a polyester‑film base interwoven with a glass‑fiber scrim backing, coated on one face with a non‑corrosive, acrylic‑based pressure‑sensitive adhesive.

Features

• Easy Application:​ The adhesive bonds immediately without needing heat, water, or any surface pre‑treatment.
• Thermal Endurance:​ Built for continuous service at temperatures up to 130°C (266°F).
• High Dielectric Strength:​ Provides a minimum dielectric breakdown voltage of 4990 V.
• Corrosion‑Free:​ Achieves an electrolytic corrosion factor of 1.0 (no corrosion detected in testing).
• Excellent Insulation:​ Minimum insulation resistance rated at 1 × 10¹⁰ Ω.
• Dimensional Stability:​ Total thickness measures 6.45 ± 0.75 mils (0.164 ± 0.019 mm).
• Strong Adhesion:​ Minimum peel adhesion to steel is 30 oz/in (3.3 N/cm).
• Robust Tensile Strength:​ Minimum breaking strength of 250 lb/in (438 N/cm).
• Zero Stretch:​ Minimum elongation rated at 0%.
• Long Storage Life:​ Retains performance for 5 years from manufacture when stored in humidity‑controlled conditions (50–80°F / 10–27°C, <75% RH).

Datasheet

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Applications

• Securing Lead Wires:​ Ideal for anchoring electrical leads in place.
• Coil Bundling:​ Used for banding and stabilizing electromagnetic coils.