800-852-6832 | 5010 River Rd. Mt. Bethel, PA 18343

WMP-Retro
POLYPROPYLENE / SCRIM / KRAFT / GLASS MAT / FOIL

Tentative Specification

FACING COMPOSITION DESCRIPTION VALUES (ENGLISH) VALUES (Metric)
White Film Metallized Polypropylene 0.0015 inch 38.1 micron
Adhesive Flame Resistant
Reinforcing Tri-directional
Fiberglass/Polyester
5 / inch (MD)
5 / inch (XD)
20 / 100 mm (MD)
20 / 100 mm (XD)
Kraft Natural 30 lbs / 3000 ft² 49 g / m²
Adhesive Polymeric    
Mat Fiberglass 27 lbs / 3000 ft² 44 g / m²
Foil Aluminum 0.0003 inch 7.6 micron
PHYSICAL PROPERTIES TEST METHOD VALUES (ENGLISH) VALUES (Metric)
Basis Weight Scale 44 lbs / 1000 ft² 215 g / m²
Permeance (WVTR) ASTM E96 Procedure A 0.02 perm (grains/hr. ft². in Hg) 1.15 ng / N.s
Bursting Strength ASTM D774 75 psi 5.3 kg / cm²
Tensile Strength ASTM C1136 70 lbs/inch width (MD)
60 lbs/inch width (XD)
12.3 kn / m (MD)
10.5 kn / m (XD)
Caliper / Thickness Micrometer 0.020 inch 508 micron
Accelerated Aging 30 Days @ 95% RH,
120°F (49°C)
No Corrosion
No Delamination
No Corrosion
No Delamination
Low Temperature Resistance ASTM D1790
 -40°F (-40°C)
Remains Flexible
No Delamination
Remains Flexible
No Delamination
High Temperature Resistance 4 hours @ 240°F (116°C) Remains Flexible
No Delamination
Remains Flexible
No Delamination
Water Immersion 24 hours @ 73°F (23°C) No Delamination No Delamination
Mold Resistance ASTM C665 / C1338 No Growth No Growth
Dimensional Stability ASTM D1204 0.25% 0.25%
Light Reflectance ASTM C523 85% 85%
FIRE TESTING ASTM E84
White Side Exposed
Flame Spread 15
Smoke Developed 35

Physical Properties based upon statistical averages, Weight / Thickness +/- 10%