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Mask-Off Featured Products

Protex® tapes are the solution. Mask-Off manufactures the highest quality pressure-sensitive protective masking products — trusted by aerospace, composites, automotive, and marine industries worldwide.

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Protex®

Trusted Brand

Market Sectors

Where Protex® Works

Protex protective masking products are specified by engineers and operators across four demanding industries where surface damage is never acceptable.

Aerospace

Precision masking for aircraft surfaces, canopies, and sensitive components requiring zero residue and clean removal.

Composites

Specialty films and papers designed to work seamlessly with autoclave processes and composite layup operations.

Defense

Durable surface protection for paint, glass, and trim during manufacturing, transport, and finishing processes.

Marine

Moisture-resistant masking solutions built for the harsh demands of marine construction and refinishing.

Automotive

Clean-release masking for paint, trim, and body panels throughout assembly and finishing.

Boeing BAC 5034 / Type IV / Class 1 / Grade A

Protex 5
Protex 50
Protex 10V
Protex 20S

Protex 20V
Protex 8216-2
Protex 8216-2L
Protex 8216-5B

Protex 1321D-3
Protex 223-2
Protex 223-5
Protex 8216-2DSHT

Boeing BAC 5317

Protex 50
Protex 223-2
Protex 223-5 (All)

AIMS 12-6-001

Protex 50
8216-2L 

Protex 20V

Protex 223-2

Protex 223-5

National Stock Number

Protex 5 Protex 10V Protex 10VS Protex 223-5 Protex 20S Protex 20V
NSN 8135-00-946-2090 NSN 7510-01-121-8267 NSN 7510-01-121-8267 NSN 8135-01-425-0678 NSN 8135-01-452-7718 NSN 8135-00-654-9834 NSN 7510-01-054-4067

Approvals & Qualifications

OEM Specifications & NSN Numbers

Protex® products are approved by leading aerospace OEMs and listed under US Government National Stock Numbers, ensuring compliance for use on commercial and military aircraft programs.

Product Boeing Specification Airbus Specification NSN / Gov
Protex 5
 BAC 5034 Type IV / Class I / Grade A —
NSN 8135-00-946-2090
Protex 50
 BAC 5034 · BAC 5317 — —
Protex 10V
 BAC 5034 Type IV / Class I / Grade A —
NSN 7510-01-121-8267
Protex 10VS
 — —
NSN 7510-01-121-5011
Protex 20V
 BAC 5034 Type IV / Class I / Grade A AIMS 12-6-001
NSN 8135-00-654-9834
NSN 7510-01-054-4067
Protex 20S
 BAC 5034 Type IV / Class I / Grade A —
NSN 8135-01-452-7718
Protex 8216-2 / 8216-2L
8216-5B / 1321D-3
 BAC 5034 Type IV / Class I / Grade A AIMS 12-6-001 (8216-2L)
NSN 8135-01-452-7718
Protex 223-2
Protex 223-5
 BAC 5034 · BAC 5317 AIMS 12-6-001
NSN 8135-01-425-0678
DPM 2128 · DMS 2128

Market Segments

End-to-End Aerospace Coverage

3M’s aerospace portfolio includes thousands of qualified products spanning adhesives, structural films, protective tapes, sealants, and surface treatment chemistries.

Protex 5

Kraft Paper · Low Tack
Lightweight kraft paper masking tape with gentle low tack adhesive. Ideal for protecting delicate painted finishes and glass surfaces during short-term operations. NSN listed.
Boeing BAC 5034 · NSN

Protex 50

Kraft Paper · Medium Tack
General-purpose paper protective tape providing reliable adhesion for masking during paint operations, assembly staging, and surface protection in aerospace maintenance environments.
Boeing BAC 5034 · BAC 5317

Protex 55

Kraft Paper · Medium Tack
Extended-duration paper masking tape for longer-term surface protection requirements. Bonds securely without lifting or flagging at edges during extended exposure on shop floors and hangars.
Boeing BAC 5034 · BAC 5317

Protex 20V / 20S

Kraft Paper · Medium-High Tack
Medium-to-high tack variants designed for outdoor and hangar environments. The V series provides increased adhesion on vertical surfaces; the S variant adds slit edge conformability.
Boeing · Airbus AIMS · NSN

Protex 10V / 10VS

Kraft Paper · High Tack
High-tack paper tape engineered for demanding adhesion on complex contoured surfaces. Used on aircraft wing leading edges, engine cowlings, and irregular panel geometries. NSN qualified.
Boeing · Airbus AIMS · NSN

Protex 7SV / 40S

Kraft Paper · Specialty
Specialized paper tapes for niche masking applications requiring specific tack levels, backing weights, or conformability characteristics not covered by the standard product range.
Specialty Application

Protex 223-2

Polyester Film · Low Tack
Thin, transparent polyester film tape with low tack adhesive. Provides crystal-clear surface protection for windows, canopies, and polished transparencies during aircraft painting and assembly.
Boeing · Airbus AIMS · NSN

Protex 223-5

Polyester Film · Medium Tack
5-mil polyester protective film for general surface protection applications. Bonds cleanly and removes without adhesive residue across a wide temperature range, including outdoor storage.
Boeing · Airbus AIMS · DMS 2128

Protex 223-5HT

Polyester Film · High-Temp Medium Tack
High-temperature variant of Protex 223-5, engineered to maintain adhesion and clean removability after exposure to elevated temperatures during paint bake and oven cure operations.
High Temperature

Protex 223-5VHT

Polyester Film · Very High-Temp
Maximum heat resistance in the 223 series — for applications where masking must survive extreme temperature excursions without delaminating, flagging, or leaving adhesive transfer.
Very High Temperature

Protex 1321D-3

Polyester Film · Specialty
Specialty polyester masking film for critical surface protection requirements. Boeing BAC 5034 approved, NSN qualified. Used on primary aircraft structural surfaces and inspection-critical areas.
Boeing BAC 5034 · NSN

Protex 8209L

Polyester Film · Liner-Backed
Polyester film with release liner, optimized for die-cutting into custom shapes. Provides consistent, repeatable adhesion suitable for shaped masking cuts produced on Mask-Off's plotter table system.
Die-Cut Compatible

Protex 8216-2

Polypropylene Film · Standard
2-mil opaque white polypropylene protective film. Boeing BAC 5034 and NSN qualified. The foundational polypropylene product for general aerospace surface masking and protection during assembly operations.
Boeing BAC 5034 · NSN

Protex 8216-2L

Polypropylene Film · Liner-Backed
Liner-backed 2-mil polypropylene film optimized for die-cutting. Enables production of precisely shaped masking pieces for windows, panels, and complex apertures directly from CAD data.
Airbus AIMS · Die-Cut Ready

Protex 8216-2C / 2LC

Polypropylene Film · Clear
Clear variants of the 8216-2 and 8216-2L, providing transparency for inspection without removal. Enables visual checks on protected surfaces during production without disturbing the masking.
Clear / Transparent

Protex 8216-5B

Polypropylene Film · 5-mil Heavy
Heavy-duty 5-mil polypropylene protective film for high-abrasion and long-duration masking. Provides robust protection on composite fuselage panels and large aircraft surfaces during extended production cycles.
Boeing BAC 5034 · NSN

Protex 8216-5B

Polypropylene Film · 5-mil Liner
Liner-backed version of Protex 8216-5B for die-cut part production. Combines the heavy protection of the 5-mil substrate with the precision application accuracy of pre-cut pieces.
Heavy Duty · Die-Cut Ready

Sharpline 200

Polypropylene · Fine-Line
Fine-line polypropylene masking film engineered for crisp, sharp paint edges on aircraft liveries and decorative paint schemes. Conformable backing follows surface contours for clean, bleed-free paint lines.
Fine-Line Masking

Why Mask-Off

Protecting Surfaces the World Trusts.

From the flight decks of commercial airliners to NASCAR composites shops, Protex tapes protect finished surfaces during handling, painting, assembly, and shipping. Coast-Line International is a proud authorized US distributor of the complete Protex® product line.

Protex tapes are not general-purpose masking products — they are engineered specifically for the demanding requirements of aerospace and advanced manufacturing applications.

Product Lines

The Protex® Family

Three material families — each engineered for distinct performance requirements and surface protection challenges.

Paper

Pressure-sensitive paper masking products for aerospace, automotive, and industrial applications. Designed for clean removal without adhesive transfer. Available in a range of tack levels to suit any surface.

Aerospace

Low Tack

Zero Residue

Polyester

High-performance polyester film masking for outdoor and demanding environments. Superior UV and moisture resistance, ideal for longer-duration protection during manufacturing or storage.

Outdoor

UV Resistant

Marine

Polypropylene

Specialty polypropylene masking films engineered for unique surface configurations and specialty applications where conformability and consistent adhesion are critical.

Specialty

Conformable

Composites

Source Protex® Through Coast-Line.

Whether you need a standard roll product or custom die-cut pieces for a specific aircraft program, our team stocks the complete Protex® line and can support your masking requirements with fast US-based fulfillment.
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