Industrial-grade masking tape engineered for chromic acid anodization, delivering 5x faster masking than liquid solutions with sharp lines, non-silicone formulation, and up to 60% labor cost savings.
3M™ Anodization Masking Tape 8985L is a premium industrial masking solution specifically engineered for chromic acid (Type I) anodization applications. This specialized tape features a durable polyester backing with rubber adhesive formulation designed to withstand the harsh chemical environment of anodization baths while maintaining sharp masking lines and minimizing leakage. The transparent purple color allows for fast, accurate positioning and easy identification during application, making it an ideal choice for precision metal finishing operations.
This high-performance masking tape delivers exceptional productivity improvements, capable of masking and de-masking up to 5x faster than traditional liquid masking solutions with zero cure time required. The non-silicone formulation significantly reduces the risk of silicone contamination that could compromise downstream processes such as bonding or paint adhesion. Users can achieve up to 60% reduction in labor time and associated costs through easier application and clean, one-piece removal compared to labor-intensive liquid masking methods. The tape comes with a film liner that provides added stability for easy die-cutting and precise application.
Designed for industrial and occupational use, 3M Anodization Masking Tape 8985L is recommended for aerospace components, precision machine components, and welded assemblies. Each case contains one roll measuring 48 inches in width by 72 yards in length, providing substantial coverage for production environments. The tape's ability to be used with or without chemical film on various aluminum and other metal alloys makes it a versatile solution for diverse anodization requirements. Maximum operating temperature reaches 93°C, ensuring reliable performance throughout the anodization process.
Key Features
- Specifically engineered for chromic acid Type I anodization baths with superior chemical resistance
- Masks and de-masks up to 5x faster than liquid masking with zero cure time required
- Transparent purple color enables fast, accurate positioning and easy visual identification
- Non-silicone rubber adhesive formulation prevents silicone contamination and bonding failures
- Durable polyester backing with film liner for sharp masking lines and easy die-cutting
- Up to 60% reduction in labor time and associated costs compared to liquid masking
- Clean one-piece removal minimizes part rework and leakage issues
- Compatible with or without chemical film on aluminum and various metal alloys
- Maximum operating temperature of 93°C ensures reliability throughout anodization process
- Ideal for aerospace components, precision machine parts, and welded assemblies
Technical Specifications
| Specification |
Value |
| Product Type | Masking Tape |
| Brand | 3M™ |
| Product Series | 8985L |
| Part Number | 8985L |
| UPC Code | 00638060403815 |
| 3M Product Number | 8985L |
| 3M ID | 7100207286 |
| Product Color | Purple (Transparent) |
| Backing Material | Polyester |
| Adhesive Type | Rubber (Non-silicone) |
| Number of Adhesive Sides | Single-sided |
| Overall Width (Imperial) | 48 inches |
| Overall Width (Metric) | 1,219.2 mm |
| Overall Length (Imperial) | 72 yards |
| Overall Length (Metric) | 65.8 meters |
| Total Tape Thickness without Liner (Imperial) | 3.9 mil |
| Backing Thickness (Imperial) | 3 mil |
| Backing Thickness (Metric) | 0.076 mm |
| Core Size (Imperial) | 3 inches |
| Core Size (Metric) | 7.6 cm |
| Maximum Operating Temperature (Celsius) | 93°C |
| Maximum Operating Temperature (Fahrenheit) | 199.4°F |
| Clean Removal | Yes |
| Smallest Saleable Unit | Roll |
| Units per Case | 1 Roll |
| Liner Type | Film Liner |
| Application Type | Masking |
| Compatible Anodization Process | Type I Chromic Acid Anodization |
| Silicone Content | Non-silicone formulation |
| Recommended Industries | Automotive, General Industrial, MRO, Military & Government, Specialty Vehicles, Transportation |
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