P8500 Series Foam Gasketing Tapes are flexible open cell foam tapes, single side coated with high-tack, permanent, rubber-based, pressure sensitive adhesive. These tapes exhibit a superior balance of tack, peel, and holding power on a wide variety of surfaces. Available in several thicknesses, P8500 is cost-effective, resists water and moisture, has very good air permeability, and remains flexible over a long period of demanding usage.

  • 1/8″ to 1″ thick (standard)
  • Custom widths
  • Rolls or Long Length Spools
  • Die Cut Gasketing

Products Details

  • Technical Specs
  • Product Highlights
  • Applications
  • Available Options
  • Features

P8500 Series Foam Gasketing Tapes are flexible open cell foam tapes, single side coated with high-tack, permanent, rubber-based, pressure sensitive adhesive.

Standard Roll SizesSerial NumberThinknessLength
All rolls available in widths from 1/8” to 54”P85121/8"100'
Adhesion PropertiesTestTypical PerformanceTest Method
Loop Tack115 oz/in typicalTLM1 LIB1
Adhesion to Steel @ 72°F
- Steel immediate7 lbs/in width or foam tearPSTC-1
- Steel after 24 hrs8 lbs/in width or foam tearPSTC-1
Adhesion to Steel, 20 minute dwell10 lbs/in width minimumPSTC-1
Static Shear @ 72°F 1 x 1 x 500 grams1000 hours minimumPSTC-7
Static Shear @ 72°F 1 x 1 x 1000 grams200 hours minimumPSTC-7
Optimal Application Temperature50°F to 80°FPres-on PTM-1
Functional Temperature0°F to 140°FPres-on PTM-2
Shelf Life1 year stored at room temperature
Physical PropertiesPropertyTest MethodUnits of MeasureResults
DensityASTM D-3574-81lb/ft22 +10%
Tensile StrengthASTM D-3574-81psi17 - 25
ElongationASTM D-3574-81%125 - 175
Tear ResistanceASTM D-3574-81PPI1.4 - 2.2
Compression Set
(50%-22 hrs @ 70°F)
ASTM D-3574-81%10 (max)
Compression Force
25% Deflection: 0.60 to 0.85
50% Deflection: 0.70 to 1.00
70% Deflection: 1.30 to 2.10
ASTM D-3574-81574-81 psi--
Cell CountVisualPores Per Inch50 to 60
Retention of Tensile Strength
6 Hours Autoclave @ 120°C: 70%
24 Hours Dry Heat Aging @ 140° C: 80%
ASTM D-3574-81%--
(thickness approval @ .062)
UL94Dripless Minutes94 HF-1

  • Pressure sensitive, rubber based adhesive with excellent grab
  • Fine cell polyester urethane foam is highly flexible
  • Tape resists aging, weather, and environmental damage
  • Excellent adhesion to wide range of surfaces
  • Ideal for RV and automotive door gasketing
  • Seals out moisture and dust, dampens sound and vibration

P8500 Series Foam Gasketing Tapes are designed for automotive gasketing applications, especially for RV doors.

  • Door Gasketing
  • Vibration / Noise Dampening

Application Notes

Thoroughly clean contact surface before use. Once P8500 has been applied, it cannot be removed and reused. Therefore, position P8500 carefully, assuring that it is in contact with all surfaces. If P8500 is misaligned, remove used unit, discard and repeat application with new unit. Test product for system compatibility as individual application conditions can impact results.

  • Release Liner: White Liner. Brown Kraft Paper available
  • Custom die-cut shapes

Series Thickness Sizes:

P8512 – 1/8″ thick

P8518 – 3/16″ thick

P8525 – 1/4″ thick

P8537 – 3/8″ thick

P8550 – 1/2″ thick

P8575 – 3/4″ thick

P851 – 1″ thick

P851.46 – 1.5″ thick (1.46″)

Soft Foam

Open Cell Foam

Sound Absorbing Foam

Insulation Foam

Used For:

HVAC Foam Tape

Filter Foam Tape

Cushioning Foam Tape

Face Mask Foam Tape

Face Shield Foam Strips

Long Length Spooling

Door Gasket Tape

Electronics Foam Tape

Battery Cushion

Enclosure Doors