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SKU 7100207280
Legacy SKU 70007540340
UPC 00638060403761
Part Number 8985L
Product Number 8985L

3M™ Anodization Masking Tape 8985L is a reliable non-silicone solution for Type I (chromic acid) anodization. Designed for performance, it is specifically resistant to chromic acid and provides sharp lines with a rubber adhesive for easy removal. This tape can mask and de-mask up to 5x faster* than labor-intensive liquid masking for improved productivity.

  • Designed specifically for masking in chromic acid (Type I) anodization baths
  • Masks and de-masks up to 5x faster* than liquid masking, with no cure time
  • Transparent purple tape for fast, accurate positioning and easy identification
  • Provides sharp masking lines and minimizes leaking to reduce the need for part rework
  • Non-silicone formulation helps reduce post-process coating and bonding failures
  • Polyester backing with rubber adhesive and film liner
  • Liner provides added stability for easy die-cutting
Estimated date of shipment April 18  


Minimum Order 48 Rolls
Order Increment 48 Rolls
Product Dimensions
Imperial Metric
Width 1 in 25.4 mm
Length 72 yd 65.8 m
Center Hole Diameter 3 in 7.6 cm
Shipping Dimensions
Weight 28.394 lb
Length 13.4 in
Width 13.4 in
Height 14.3 in
Color Purple
Brochures, Catalogs & Data Sheets
  • Pdf   Sales Guides_3m anodization ma
For industrial/occupational use only. Not for consumer sale or use.
3M industrial and occupational products are intended, labeled, and packaged for sale to trained industrial and occupational customers for workplace use.  Unless specifically stated otherwise on the applicable product packaging or literature, these products are not intended, labeled, or packaged for sale to or use by consumers (e.g., for home, personal, primary or secondary school, recreational/sporting, or other uses not described in the applicable product packaging or literature), and must be selected and used in compliance with applicable health and safety regulations and standards (e.g., U.S. OSHA, ANSI), as well as all product literature, user instructions, warnings, and other limitations, and the user must take any action required under any recall, field action, or other product use notice.  Misuse of 3M industrial and occupational products may result in injury, sickness, death, or property damage.  For help with product selection and use, consult your on-site safety professional, industrial hygienist, or other subject matter expert.
Engineered Specifically for Resistance to Chromic Acid
3M™ Anodization Masking Tape 8985L has a tough polyester carrier to stand up to chromic acid anodization baths (Type I anodization). It also features a non-silicone rubber adhesive to minimize the risk of silicone contamination that could impact downstream processes such as bonding or paint adhesion. This tape provides sharp masking edges, minimizing leakage and the need for rework, and can be used with or without chemical film on a variety of aluminum and other metal alloys.

3M™ Anodization Masking Tape 8985L can replace complex, messy liquid masking and the unpleasant odors involved. The transparent tape is easy to position and can be applied in fewer steps; it also eliminates the cure time of a liquid so that overall masking and de-masking can be accomplished up to five times faster*. Ease of application and clean, one-piece removal mean users could save up to 60%* on labor time and associated costs. This tape is transparent purple with a printed backing for visibility and has a liner for easy die-cutting.

*Up to 5x faster and up to 60% reduction in labor time both based on 3M internal data.

Recommended Applications

Aerospace components
Precision machine components
Welded assemblies

Bringing Better Ideas to the Surface Through Science and Innovation
The 3M Industrial Adhesives and Tapes Division applies the science of adhesion to deliver innovative solutions that improve the design and manufacturing processes of companies around the world. In the end, these technologies help customers deliver competitive products to the market faster and more efficiently.   Add to cart