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
In our 3M Industrial Adhesives and Tapes Division, we apply the science of adhesion to deliver innovative solutions that improve the design and manufacturing processes of companies around the world. In the end, our technologies help customers like you deliver competitive products to the market faster and more efficiently.

3M 37024, Extra Large Drywall Sanding Sponge 910-DDA, Dual Angle, 2-1/2 in x 8 in x 1 in, Fine, 7010375249
3M 26015, PPS Series 2.0 Adapter, Type S8, 12 mm Male, 1.0 mm Thread, 7100135931
3M 26135, PPS Series 2.0 Adapter, Type S40, Trapezoidal Thread, 7100135335
Standard Abrasives 705509, A/O Full Taper Cartridge Roll, 3/8 in x 1-1/2 in x 1/8 in 80, 7100085865
Standard Abrasives 704972, A/O Tapered Cone Point, D-40 180, 7010368594, 100 per case
3M 87105, Cubitron II Stikit Film Disc 775L, 220+, 6 in x NH, Linered w/Tab, Die 600Z, 7100075221, 250 per case
3M 29611, 641WY 1/4" X 24", 100 Mesh Diamond Cloth Belt, 7010534832
3M 24049, Wetordry Cloth Disc 281W, P1000 YF-weight, 8 in x NH, Die 800JM, 7000045052
3M 62795, Polyurethane Adhesive Sealant 550FC Fast Cure, Black, 310 mL Cartridge, 7100001803, 12/Case
Standard Abrasive 78548, Ceramic Pro Type 29 High Density Flap Disc, 645183, 4 1/2 in x 7/8 40 Y-weight, 7010292440
3M 01328, PSA Cloth Disc 348D, P180 X-weight, 3 in x NH, Die 300V, 7000045068
3M 87179, Scotch-Weld Epoxy Adhesive 2216NS, Tan, Part B, 5 Gallon Drum (Pail), 7010309882
3M Super Abrasives Roloc Disc, 2" Type-R, Medium AO High Strength, Box of 50
3M 33349, 641WY 1/4" X 24", 220 Mesh Diamond Cloth Belt, 7010534919
3M 05048, Cloth Belt 384F, 80+ XF-weight, 1 in x 12 in, Fabri-lok, Full-flex, 7100141432, 200 per case
3M Scotchkote Liquid Epoxy Coating Spray System HSS Mix Nozzle, RightAngle, 7000058900
Dynabrade 64404 36" W x 60" L (914 mm W x 1,524 mm L) Metal Capture Downdraft Table, 230 V (AC), Side Exhaust
3M 71361, 641WY 1/4" X 24", 1200 Mesh Diamond Cloth Belt, 7010534916 
