3M™ Polyimide Tape 8998

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Dark amber colored 2.0 mil polyimide backing with silicone pressure sensitive adhesive

Ideal for high temperature applications

Seals tight on contact, peels off clean up to 500°F/260°C

Overall Width (Imperial)

Overall Width (Metric)

Product Color

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Details

Highlights

Dark amber colored 2.0 mil polyimide backing with silicone pressure sensitive adhesive
Ideal for high temperature applications
Seals tight on contact, peels off clean up to 500°F/260°C
Exceptional tensile strength to break through cured paint
Excellent thermal, chemical and abrasion resistance
Thin backing for sharp paint line

3M™ Polyimide Tape 8998 is a dark amber colored polyimide tape with a silicone adhesive meant to withstand heat during high-temperature masking operations. It offers excellent thermal, chemical and abrasion resistance. It seals tight on contact and peels off clean at up to 500°F/260°C.

3M™ Polyimide Tapes are engineered to leave sharp, clean edges—even after paint bake applications up to 500°F/260°C

Economical, Reliable, High Temperature Powder Coat Masking
With temperatures rising in powder coat paint operations, customers require a masking tape that can take the heat. Specifically designed for higher temp powder coat paint applications, 3M™ Polyimide Tape 8998 features a 2.0 mil thick polyimide backing with a 1.2 mil silicone adhesive. It is ideal for use in high temperature applications up to 500°F/260°C. Its dark amber color ensures easy identification and alignment. The high dimensional and exceptional tensile strength of this polyimide tape allows it to break through cured paint without silvering or tearing.

Common uses for 3M™ Polyimide Tape 8998 include masking parts for powder coating, masking edges of overlap seams, e-coating, electroplating, anodizing and as a barrier of separation for dissimilar metals. It resists shrinking, curling and edge lifting and removes with zero adhesive residue. The thin, flexible backing seals tight on contact, peels off clean and leaves sharp, clear paint edges.

High dimensional and tensile strength—designed to break through cured paint without slivering or tearing

Learn more about for 3M™ Polyimide Tapes. (PDF, 159.4 Kb)

Recommended Application

Masking parts for powder coating
Masking edges of overlap seams
Barrier of separation for dissimilar metals

Polyimide Tapes for High Temp Applications
3M, the leader in masking tape technology, has developed a variety of polyimide tapes to insulate, mask, protect, seal, flash break, tab, powder coat and anodize mask. These revolutionary polyimide tapes withstand heat during rigorous, high-temperature masking operations. An exceptionally thin backing resists tears, abrasion, and the effects of aging. Pick a tape that can take the heat and keep your paint lines sharp!

Typical properties

Details

Adhesive Type	Silicone
Back Side Adhesive Thickness (Imperial)	1.3 mil
Back Side Adhesive Thickness (Metric)	0.03 mm, 0.05 mm
Backing (Carrier) Material	Polyimide Film
Backing (Carrier) Thickness (Imperial)	2 mil
Backing (Carrier) Thickness (Metric)	0.05 mm, 0.051 mm
Brands	3M™
Elongation at Break	0.49, 49
Maximum Operating Temperature (Celsius)	260 ℃
Maximum Operating Temperature (Fahrenheit)	500 ℉
Product Color	Amber, Dark Amber
Shelf Life	24 Month
Smallest Saleable Unit	Roll
Tensile Strength (Imperial)	55 lb/in, 880 oz/in
Tensile Strength (Metric)	96.3 N/100mm, 963 N/100mm
Units per Case	1.0, 8.0, 12.0, 24.0, 36.0, 48.0, 72.0

Dimensions and Classifications

Overall Length (Imperial)	36 yd, 72 in, 144 yd
Overall Length (Metric)	32.9 m, 32.91 m, 65.8368 m, 131.674 mm
Overall Width (Imperial)	0.5 in, 0.75 in, 1 in, 1.5 in, 2 in, 3 in, 4 in, 19.7 in
Overall Width (Metric)	5.1 mm, 12.7 mm, 19.05 mm, 25.4 mm, 38.1 mm, 76.2 mm, 101.6 mm, 495.3 cm, 500.38 mm

Resources

3M™ Polyimide Tape 8998

Other

(PDF, 85KB)

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	Current product 3M™ Polyimide Tape 8998	3M™ Polyimide Tape 8997	3M™ Polyester Tape 8902	3M™ High Temperature Nylon Film Tape 855
Overall Width (Metric)	5.1 mm, 12.7 mm, 19.05 mm, 25.4 mm, 38.1 mm, 76.2 mm, 101.6 mm, 495.3 cm, 500.38 mm
Overall Width (Imperial)	0.5 in, 0.75 in, 1 in, 1.5 in, 2 in, 3 in, 4 in, 19.7 in
Backing (Carrier) Material	Polyimide Film
Product Color	Amber, Dark Amber
Adhesive Type	Silicone

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.