3M™ Polyimide Film Electrical Tape 1218 with Acrylic Adhesive
Data Sheet
Product Description
May 2021
3M™ Polyimide Film Electrical Tape 1218 is an amber UL recognized flame retardant, 3.15-mil
(0.080 mm) thick tape composed of a 1-mil (0.025 mm) polyimide film backing coated on one
side with a non-corrosive, acrylic pressure-sensitive adhesive.
Commonly used in wrapping coils, capacitors, wire harnesses, transformers and anchoring
leads
Commonly used in printed circuit board assembly as a solder masking tape
Higher temperature rating than 3M™ Polyimide Film Electrical Tape 1205 (155°C/311°F)
Adhesive requires no heat, moisture or other manner of preparation to affect application
Designed for continuous operation not exceeding 180°C (356°F) per UL listing
Properties
Value
Imperial (Metric)
Amber
Physical Properties
Color - Visual
Adhesive
Acrylic
Backing
Polyimide Film
Flame Retardant2
Adhesion to Steel1 - Minimum
Pass
Value
Imperial (Metric)
1 mil (0.025 mm)
3.15 +/- 0.2 mils
(0.080 +/- 0.005 mm)
14 oz/in (1.5 N/cm)
Breaking Strength1 - Minimum
20 lb/in (35 N/cm)
Mechanical Properties
Backing Thickness - Nominal
Total Thickness1
Elongation1 - Minimum
Notes:
1.
2.
3.
Electrical Properties
Dielectric Breakdown1 - Minimum
Electrolytic Corrosion Factor3
Insulation Resistance1 - Minimum
Value
Imperial (Metric)
5500 V
1.0
1x1012 Ω
50%
ASTM D1000 Test Method - properties measured at room temperature 73°F (23°C) unless otherwise stated
UL Recognized Flame Retardant per UL510A Standard
3M Test Method ETM-54001 - 1.0 equates to no corrosion observed
Agency Approvals &
Self Certifications
UL Component Recognized: UL510A Standard, Category OANZ2, File No. E17385
Shelf Life & Storage
This product has a 5-year shelf life (from date of manufacture) when stored in humiditycontrolled storage (50°F/10°C to 80°F/27°C and
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