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 01328, PSA Cloth Disc 348D, P180 X-weight, 3 in x NH, Die 300V, 7000045068
3M 35790, 675L, 1" X 120", 74u, Diamond Microfinishing Film Belts, 7010509196
3M 94717, Cubitron ll Cloth Belt 947A, 80+ X-weight, 1 in x 30 in, Fabri-lok, Single-flex, 7010294445, 200 per case
Dynabrade 78425 4-1/2" Dia. x 3/8" Coarse DynaBrite Surface Conditioning Disc, 25/pack
3M 05519, Sanding Block, Rubber, 2-3/4 in x 5 in, 7000000587
3M 22409, Roloc Disc 361F, P120 XF-weight, TR, 1-1/2 in, Die R150S, 7000045103
3M 15289, 663FC, 2-3/4" X 160", 40u, Diamond Trizact Belts 7010508900
3M™ 07011, Supplied Air Respirator Hose W-9435-50/07011(AAD), 7000005373, 1 EA/Case
Dynabrade 78725 5/16" x 5/8"-B53 Dynacut A/O Mounted Point, Vitrified, 5/pack
3M™ 72122, Portable Compressed Air Filter and Regulator Panel 256-02-01, 100 cfm, 8 outlets, with Carbon Monoxide Monitor, 7000052147, 1 EA/Case
3M 22405, Roloc Disc 361F, P100 YF-weight, TR, 3 in, Die R300V, 7000045102
3M 36877, Self-Stick Liquid Protection Fabric, Blue, 6 in x 300 ft per Roll, 7100169347, 4 Rolls Per Pack
3M 22408, Roloc Disc 361F, P100 YF-weight, TR, 1-1/2 in, Die R150S, 7000045101
3M™ 17323, Versaflo™ Respiratory Helmet Assembly M-407, with Premium Visor and Flame Resistant Shroud, 7000002395, 1 EA/Case
3M 03999 Scotch-Brite Surface Conditioning Belt, SC-BS, A/O Medium, 2 in x 132 in, 7010309300
3M 16162, PTFE Glass Cloth Tape 5453, Brown, 2 in x 36 yd, 8.2 mil, 7000144794
3M 04297 Scotch-Brite Surface Conditioning Belt, SC-BS, A/O Very Fine, 2 in x 132 in, 7010365859
3M 64070, Contractor Grade Pro Strength Duct Tape 3979, Silver, 1.88 in x 60 yd, 7010375912
3M 42049, Polyurethane Adhesive Sealant 560, Gray, 310 mL Cartridge, 7000121524, 12/Case
3M 45714, Cubitron II Hookit Cloth Disc 947A, 120+ X-weight, 3 in x NH, D/F 3HL, Die 300BE, 7100113113
3M 05228 Scotch-Brite Surface Conditioning Belt, SC-BS, A/O Medium, 3-1/2 in x 15-1/2 in, 7000028435
3M 20911, PSA Cloth Disc 348D, 50 X-weight, 2 in x NH, Die 200P, 7000118871
3M 11411, Roloc Disc 361F, 50 YF-weight, TR, 1 in, Die R100N, 7000045095
3M™ 72787, Calibration Kit 529-04-48, Large, 7000052154, 1 EA/Case 
