Nashua 360-17 FoilMastic Butyl Rubber Tape

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Nashua 360-17 / Polyken 360-17 FoilMastic Butyl Rubber Tape is a printed, 2 mil dead-soft aluminum foil backing with a 15 mil butyl rubber mastic adhesive. It is a waterproofing repair tape used for indoor or outdoor sealing of low, medium & high pressure HVAC duct systems (includes: metal duct, fiberglass duct and flexible duct systems). It seals cracks and seams in gutters, roof alleys, eaves, hips and ridges. Seal around chimneys and vent stacks. Repair gouges, rips, tears in metal panels of trailers, shipping containers and metal buildings. Also used to seal leaks in vans, cars, and trucks and for mobile home repair. Use duct mastic to mend poorly sealed connections; improve indoor air quality (since fewer pollutants circulating); lower utility bills; and burn fewer fossil fuels. SMACNA A, B, and C Seal Classes. UL 723 classified. Low VOC content and can contribute toward satisfying EQ Credit 4.1 (Low Emitting Materials) under LEED®. Features include:

  • Permanent sealant. Provides instant water tight bond.
  • Acceptable for use on galvanized materials.
  • Heavy duty all weather foil coated butyl mastic.
  • Excellent adhesion to all surfaces.
  • Extremely conformable.
  • Non-staining adhesive.
  • Paintable 2 mil foil backing (use in place of caulk).
  • Excellent resistance to cold, heat, water, and sunlight.
  • Printed for easy identification.
  • Release liner provides ease of installation.

This tape can ship with either a Polyken or Nashua branded core since both are co-brands owned by Berry Plastics (the parent company of Nashua, Polyken, Ludlow, Patco, etc.) and it will depend on the lot the rolls were received in on.

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Technical Specifications

Nashua 360-17 FoilMastic Butyl Rubber Tape Specifications

  • Adhesive: butyl rubber   How are adhesives different?
  • Carrier/Backing: 2 mil aluminum foil - printed
  • Release Liner: low density polyethylene (LDPE) film
  • Thickness: 17 mils (carrier, adhesive) 15 mils (adhesive) 2 mils (carrier)    What is a mil?
  • Adhesion: 200 ounces per inch (to stainless steel)
  • Tensile Strength: 20 pounds per inch (longitudinal)
  • Service/Operating Temperature: 40°F to 200°F
  • Flame Spread Index: 0
  • Smoke Development Index: 25
  • VOC Content: < 1 g/L
  • Certifications: tested in accordance with UL 723 and CAN/ULC-S102-10; can contribute toward satisfying EQ Credit 4.1 (Low Emitting Materials) under LEED
  • Core: 3" diameter
* specifications are those given by manufacturers and are not tested for accuracy
Nashua 360-17 FoilMastic Butyl Rubber Tape View Larger ImageView More Images
Ordering Options
Quantity:    Rolls or Cases? View Complete Pricing on all Available Sizes
Color: Silver
Roll Size: **
item offered in 2 variations; most popular is 2 in. x 100 ft. (Silver) see table below for all sizes
$ Price per item will display once
the above selections are made.
** Adhesive tape products are NOT guaranteed to be splice-free. Sizes shipped will typically be the tape industry standard metric-cut sizes, i.e. 24mm for each 1 inch of nominal tape width ordered (rolls are approximately 5% narrower than the nominal size). Please contact us to inquire about pricing for full-cut widths; e.g. a 6 inch roll cut to 152mm instead of 144mm.
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Pricing Table
2 in. x 100 ft.
Actual Size: 48mm x 30.5m
360-17/210024SINGLE ROLL

(1 to 23 rolls)


(24 to 119 rolls)


(120 to 239 rolls)


(>= 240 rolls)









* see individual roll price to left







3 in. x 100 ft.
Actual Size: 72mm x 30.5m
360-17/310016SINGLE ROLL

(1 to 15 rolls)


(16 to 79 rolls)


(80 to 159 rolls)


(>= 160 rolls)









* see individual roll price to left







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