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3M™ Photo Film Splicing Tape 8421 White, 3/4 in x 72 yd 2.5 mil, 48 per case Bulk

3M ID  70006003431    UPC#  00021200037887    Part Number  8421    3M Product Number  8421     
3M(TM) 8421 Photo Film Splicing
3M(TM) 8421 Photo Film Splicing
3M™ Polyester Tape 8421 White, 2.5 mil (0.06 mm) polyester film tape with pigmented rubber adhesive.
  • White, good tack
  • Excellent solvent and chemical resistance
  • Thin, high tear resistance, good temperature resistance, long-term aging, high strength backing
  • General Industrial, Graphic Arts, Photo Film Processing
  • Splicing, insulating, edging, reinforcing, protecting, sealing, flash breaking, tabbing, roll closing, labeling
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3M™ Polyester Tape 8421, used to pre-splice photographic film for processing. Other application ideas include sealing, labeling, protecting and edging where a high tack, rubber adhesive is desirable.


Adhesion to Steel oz/in (N/100 mm)50 (54)
Adhesive TypeRubber
ApplicationsButt Splicing and Core Starting
Backing MaterialPolyester
Backing Thickness1.4 mil
Backing Thickness (metric)0.04 mm
Elongation140 Percent
IndustriesGeneral Industrial, Print
Length72 Linear Yard
Length (Metric)65.83 m
Maximum Operating Temperature (Celsius)148 Degree Celsius
Maximum Operating Temperature (Fahrenheit)300 Degree Fahrenheit
Minimum Operating Temperature (Fahrenheit)-60 Degree Fahrenheit
Product FormRoll
Shelf Life in Months (from date of manufacture)18
Tensile Strength43 lb/in
Tensile Strength (metric)754 N/100mm
Total Thickness2.5 mil
Width0.75 Inch
Width (Metric)19.05 mm