Tolerance on nominal thickness, % ASTM D 5199 ± 10

ASTM D 5199

± 10

Mass per unit area, lb/ft2 (g/ft2 ) (kg/m2)
40-mil
60-mil

ASTM D 5261

0.21 (95) (1.03) typical
0.30 (136) (1.46) typical

Tensile strength, lbf (kN)

ASTM D 638     Dumbbell IV

72 (12.6) min.
96 (16.8) typical

72 (12.6) min.
96 (16.8) typical

Tensile elongation, %

ASTM D638

700 min.
750 typical

Tear resistance, lbf (N).

ASTM D 1004

12 (53.3) min.
18 (80.0) typical

12 (53.3) min.
18 (80.0) typical

Low temperature flexibility, °F (°C)

ASTM D 2136
1/8 in. mandrel
4 hour @ temp.

- 40 (- 40) max.
- 50 (- 46) typical

Linear Dimensional Change (shrinkage), %

ASTM D 1204

+/- 1.0 max.
- 0.5 typical

Ozone resistance, 100 pphm, 168 hours

ASTM D 1149

No cracks

No cracks

Carbon Black content, %
(Black membrane only)

ASTM D 4218

2 min.
2.75 typical

Resistance to water (distilled) absorption
After 30 days immersion 122 °F (50 °C)
Change in mass, %

ASTM D 471

1.0 max.
0.5 typical

Field seam strength, lbf/in. (kN/m)
Seam tested in peel after weld

ASTM D 1876

Cannot separate weld
(breaks outside weld)

Water vapor permeance, Perms

ASTM E 96

0.10 max.
0.05 typical

Puncture resistance, lbf (N)

ASTM D 4833

30 (133) min.
40 (178) typical

30 (133) min.
40 (178) typical

Resistance to xenon-arc weathering 1
Xenon-Arc, 10,080 kJ/m2 total radiant
exposure, visual condition at 10X

ASTM G 155
0.70 W/m2
80 °C B.P.T.

No cracks
No loss of breaking
or tearing strength