Heat-resistant PET tape

3M High-Temperature PET Tape is a single-sided masking tape with a thin polyester backing and a heat-resistant silicone adhesive, designed for heated processes such as powder coating, wave soldering and coating cure. The PET backing offers high tensile strength, does not shrink and removes cleanly after the thermal cycle, producing sharp masking lines and reducing part cleanup time.

Typical Applications

• Masking threaded holes and mating surfaces during powder coating and curing at 180–200 °C
• Masking pins and gold contacts on PCBs during wave soldering or conformal coating
• Masking during electroplating, anodizing and sandblasting of metal surfaces
• Securing lead ends and windings in transformers and motors
• Splicing films and material rolls on laminating and drying lines

Benefits

1. Silicone adhesive maintains stable adhesion at high temperatures with no edge lifting during baking
2. Removes cleanly with no adhesive residue and no solvent wipe-down after removal
3. Thin PET backing gives sharp masking lines and is easy to die-cut into circles and rectangles
4. Resists plating chemicals and paint solvents, suitable for a wide range of surface treatment processes

Key Specifications

Application Notes

Apply the tape to a clean, dry, cooled surface; press the tape edges down firmly to prevent paint or solution from seeping underneath. Remove the tape while the part is still warm, pulling back at an angle of about 135° so the paint edge does not lift. Do not expose the tape to open flame or exceed the recommended bake time.

For parts with many identical masking points, ordering pre-cut dots or custom die-cut shapes to your drawing can increase application throughput three to four times.

Contact the technical team at AMS Vietnam for advice on roll widths, custom die-cutting to your drawings and volume pricing.