3M™ Polyester Tape 8991

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Works in demanding conditions and high temperatures ranging from -60ºF (-50ºC) to 400ºF (204ºC)

Clean removal during high-temperature masking operations such as powder coating

Polyester film offers excellent thermal and chemical resistance while maintaining flexibility

Frequently viewed resources

Tech Data Sheet (PDF, 171KB)

Overall Width (Imperial)

Overall Width (Metric)

Total Tape Thickness without Liner (Metric)

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Details

Highlights

Works in demanding conditions and high temperatures ranging from -60ºF (-50ºC) to 400ºF (204ºC)
Clean removal during high-temperature masking operations such as powder coating
Polyester film offers excellent thermal and chemical resistance while maintaining flexibility
Silicone adhesive provides clean removal from a variety of surfaces
Translucent blue backing provides easy identification and positioning

Thin and conformable, 3M Polyester Tape 8991 is a general purpose tape that excels in high temperature masking operations such as powder coat painting. Coated with a silicone adhesive, this tape bonds to a variety of difficult surfaces. It is chemical resistant and performs under a wide range of temperatures and environments.

Effectively Mask in High Temperature Applications
3M™ Polyester Tape 8991 is a general purpose, thin, conformable polyester tape ideal for masking in high temperature applications. The translucent blue backing is tear resistant. Coated with a silicone adhesive, this tape functions well in masking for powder coating to provide sharp paint lines. It removes cleanly and in one-piece from most surfaces, avoiding slivering and breaking.

With good chemical resistance, this tape works effectively in chemical processes and demanding work conditions, such as anodizing. The pressure sensitive silicone adhesive performs under a broad range of temperatures ranging from -60°F (-50°C) to 400°F (204°C).

Recommended applications

Masking parts for high temperature powder coat painting
Holding parts or vacuum bags during composite bonding operations
Masking metal surfaces in acid or caustic chemical milling baths
Protective tape reduces scratches during handling and shipping

Typical properties

Details

Adhesive Type	Silicone
Application	High Temperature Masking
Backing (Carrier) Material	Polyester
Backing (Carrier) Thickness (Imperial)	1 in
Backing (Carrier) Thickness (Metric)	0.025 mm
Brands	3M™
Elongation at Break	100.0 %
Industries	Specialty Vehicle, Automotive, Military & Government, Electronics, General Industrial, Print, Construction, Transportation, Appliance
Maximum Operating Temperature (Celsius)	204 ℃
Maximum Operating Temperature (Fahrenheit)	400 ℉
Product Color	Blue
Smallest Saleable Unit	Roll
Specifications Met	ASTM D3330, ASTM D3652, ASTM D3759
Tensile Strength (Imperial)	29.0 lb/in
Tensile Strength (Metric)	50.8 N/100mm, 508 N/100mm
Total Tape Thickness without Liner (Imperial)	2.4 mil
Total Tape Thickness without Liner (Metric)	0.06 mm, 0.061 mm
Units per Case	1.0 Roll, 8.0 Roll, 12.0 Roll, 24.0 Roll, 36.0 Roll, 48.0 Roll, 72.0 Roll

Dimensions and Classifications

Overall Length (Imperial)	72 yd
Overall Length (Metric)	65.8 m, 65.83 m
Overall Width (Imperial)	0.5 in, 0.75 in, 1 in, 1.5 in, 2 in, 3 in, 4 in, 50.4 in
Overall Width (Metric)	2.5 mm, 5.1 mm, 12.7 cm, 19.05 cm, 38.1 mm, 76.2 mm, 101.6 mm, 1280 mm

Resources

3M™ Polyester Tape 8991 Data Page

Data Sheets

(PDF, 171KB)

Reviews

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	Current product 3M™ Polyester Tape 8991	3M™ Polyester Tape 876	3M™ Polyester Tape 8412	3M™ Polyester Tape 8403
Overall Width (Metric)	2.5 mm, 5.1 mm, 12.7 cm, 19.05 cm, 38.1 mm, 76.2 mm, 101.6 mm, 1,280 mm
Total Tape Thickness without Liner (Metric)	0.06 mm, 0.061 mm
Overall Width (Imperial)	0.5 in, 0.75 in, 1 in, 1.5 in, 2 in, 3 in, 4 in, 50.4 in
Total Tape Thickness without Liner (Imperial)	2.4 mil
Backing (Carrier) Material	Polyester
Product Color	Blue

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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.