PET Silicone Tape (P-350)
Green Polyester Silicone Tape for Powder Coating Masking, Surface Protection & High-Temperature Processing
High-Temp PET Film Tape with Silicone Adhesive for Powder Coating, Metal Finishing, Flashbreaker, and Selected Industrial Masking Uses
Green PET Silicone Tape is a high-temperature masking tape made with a polyester (PET) film backing and a silicone pressure-sensitive adhesive (PSA). It is designed for powder coating, metal finishing, and other heat-exposed masking processes where sharp paint lines, clean removal, and reliable handling are important.
Compared with silicone polyimide tape, polyester silicone masking tape is often the more cost-effective choice for masking lines that operate within PET tape temperature windows. It is widely used where crisp edge definition, stable processing, and efficient masking performance matter.
Key Features & Benefits
- PET film backing with silicone adhesive for high-temperature masking applications
- Designed for powder coating masking with sharp paint break lines and good edge acuity
- Clean one-piece removal under recommended process conditions
- Suitable for powder coating, selected finishing/process masking, and surface protection uses
- Thin, conformable, converting-friendly construction for slitting and die-cutting
- Cost-effective masking option when your process does not require polyimide tape temperature capability
Typical Applications
Powder Coating Masking
- Masking brackets, frames, housings, extrusions, castings and welded metal parts before powder coating
- Protecting threaded holes, contact points, grounding areas and no-coat zones during oven curing
- Creating clean paint separation and defined masking lines on metal components
- Surface protection during powder coating and related finishing operations
Selected Metal-Finishing Applications
- Selected anodizing and metal-finishing masking applications, subject to chemical compatibility testing
- Masking metal surfaces exposed to heat, coatings or defined finishing conditions
- Flashbreaker applications in suitable bonding and industrial processing workflows
Converting and Silicone-Treated Materials
- Splicing silicone-treated liners, films or papers
- Tabbing and roll closing in selected converting operations
- Die-cut or slit formats for repeatable masking patterns and production-line use
For powder coating and high-temperature painting, PET silicone tape should be selected according to the actual oven temperature, dwell time, number of cycles, substrate, surface finish, masking geometry and residue requirements. Our Powder Coating Masking Guide explains how tape thickness, silicone adhesive behavior, edge control and removal timing affect performance on real coating lines.
Engineering Insight: Common Failures to Avoid
Edge Lift During Bake → Paint Bleed
- Why it happens: surface contamination, low application pressure, or a tape construction that does not match the bake profile
- How to prevent it: clean and dry the substrate thoroughly; apply firm pressure; use thinner constructions on tight radii; verify edge acuity with a short process trial before mass production
Adhesive Transfer After Curing
- Why it happens: excessive temperature, long dwell time, incompatible surface chemistry, pretreatment residues, oils, or aggressive removal conditions
- How to prevent it: qualify the tape by peak temperature, dwell time, substrate, and chemistry; always test pretreatment chemistry compatibility; validate with samples for residue-critical parts
Jagged Paint Line / Poor Edge Definition
- Why it happens: poor conformability on complex edges, textured parts, or unsuitable thickness selection
- How to prevent it: use thinner tapes for tighter contours and sharper lines; consider die-cut parts where repeatability and boundary control matter
Technical Specifications
| Item | P-350-50 | P-350-60 | P-350-80 |
| Adhesive type | Silicone | Silicone | Silicone |
| Total thickness | 0.05 mm | 0.06 mm | 0.08 mm |
| Adhesion to steel | 6.8 N/25 mm | 8.8 N/25 mm | 9.8 N/25 mm |
| Tensile strength | 110 N/25 mm | 180 N/25 mm | 240 N/25 mm |
| Elongation at break | ≥ 60% | ≥ 80% | ≥ 100% |
| Temperature resistance (process rating) | 200°C | 200°C | 200°C |
| Roll length | 33 m / 66 m | 33 m / 66 m | 33 m / 66 m |
Note: Comparable PET silicone masking tapes in the market are commonly specified around 200°C for short bake cycles such as 30 minutes, rather than unlimited continuous exposure. Actual suitability should always be qualified with your real peak temperature, dwell time, number of cycles, substrate, and process chemistry.
How to Choose Thickness Selection
- 0.05 mm: better conformability and sharper masking on tight edges and radii
- 0.06–0.08 mm: easier handling, more robustness, and higher adhesion for heavier-duty masking needs
When to Choose PET Silicone Tape vs Silicone Polyimide Tape?
Choose Green PET Silicone Tape for most powder coating and similar masking processes where your bake profile typically falls around 180–200°C short-cycle masking conditions and you want sharp paint lines with better cost efficiency.
Choose Silicone Polyimide Tape when your process requires clearly higher heat resistance, longer high-temperature dwell times, or thermal cycling beyond normal polyester masking tape windows.
| Tape Type | Best For | Temperature Positioning |
| Green PET Silicone Tape | Powder coating, sharp paint lines, surface protection, cost-effective high-temp masking | Commonly used around 180–200°C short-cycle masking windows |
| Silicone Polyimide Tape | Higher heat windows and tougher thermal cycling | Used when PET tape temperature windows are not sufficient |
| General-purpose crepe masking tape | Room-temperature painting | Not suitable for high-temperature cure cycles |
Industry Test Standards
To support quality consistency, polyester silicone masking tapes are commonly evaluated with these industry test methods:
- Peel Adhesion: ASTM D3330
- Tensile Strength & Elongation: ASTM D3759
- Tape Thickness: ASTM D3652
Converting & Customization
- Custom slit widths and log / jumbo rolls for converters
- Rolls, sheets, and die-cut parts for repeatable masking patterns
- Self-wound formats where applicable
- OEM labeling and packaging support for distributors and long-term programs
Quality, Documentation & Traceability
We support procurement and engineering review with:
Download TDS (PDF)
View All Datasheets
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FAQ
Is this the same as powder coating tape or green polyester masking tape?
What temperature can green polyester silicone tape handle?
Will it remove cleanly after curing?
How do I choose thickness for edge acuity vs handling?
When should I use polyimide tape instead of polyester tape?
Can this tape be used for silicone liner splicing?
Ready to qualify PET silicone tape on your line?
Request a quote or samples with your required thickness, width, roll format, substrate type, and operating temperature profile. Our team will recommend a suitable grade and converting option for your application.
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Comparison Articles – Product comparisons and feature analysis
Troubleshooting – Common issues and solutions