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Product Description

Basic Use:
Fiberweb 200 is an inert, lightweight, flexible, reinforced polyester membrane thru-wall flashing. It is impervious to moisture penetration; not affected by caustic alkalis found in concrete and mortar mixes, is easily installed and has guaranteed longevity of 75 years.

Fiberweb 200 cannot/should not be used as an exposed flashing.

Composition and Materials:
Fiberweb 200 is a combination of black polyester film reinforced with fiberglass scrim and vinyl film; average finished thickness is 8 mils.
The adhesive used in the lamination process is virtually indestructible resulting in extra high resistance to delamination.

Fiberweb 200 is available in widths of 12", 16", 18", 20", 24", 36", and 48". Custom sizes over 48" are available With a 4-6 week lead time. Standard length is 300 lineal feet per roll.

Fiberweb Tape is the same polyester film as in the flashing; .
When used to repair a puncture will restore the integrity of the flashing to its physical properties 2" x 108 lineal feet per roll

Applicable Standards:
Fiberweb 200 conforms to the requirements of the following specifications:

  • Army Corps of EngineersCEGS-07600
  • Navy Corps of Engineers
  • MIL-I-631D
  • MIL-Y-1140H
  • MIL-P-1459IC (MR)
  • HH-C-466b

Technical Data:
"Mylar" polyester film is made from polyethylene terephthalate, the polymer formed by the condensation reaction of ethylene glycol and terephthalic acid. Its unusual balance of properties enables it to serve specific engineering functions as aphysical barrier in protective coatings, as a thermal barrier, as a structural barrier and as an electrical barrier.

"Mylar" contains no plasticizers and does not become brittle with age at its normal operating conditions

Tests Performed:
1. Moisture Vapor Transmission
2. Tensile
3. Puncture Resistance
4. Mullen Burst
5. Elongation
6. Cold Temperature Flex
7. Asphalt Exposure

Moisture Vapor Transmission
ASTM E96 Procedure E
0.0007 Perms

Tensile Strength (lbs.l1 inch width)
103.1 Machine Direction
120.4 Cross Machine Direction

Tensile Strength (psi)
11,855 Machine Direction
13,833 Cross Machine Direction

Puncture Resistance, Beach Units

Tear Strength (Mullen Burst)

Tear Resistance
ASTM Dl 004-66
14541bs./linch Machine Direction
15321bs./linch Cross Machine Direction

ASTM D412-68

Cold Temperature Flex
1/8" Mandrel @ 180 Degree Bend @ -100 Degree F
1/16" Mandrel @ 180 Degree Bend @ -100 Degree F
No cracking or peeling

Asphalt Exposure
30 Days @ 160 Degrees F
No change

Corrosion Resistance:
Freshly prepared freshly prepared specimens were prepared employing a mixture of portland cement, sand, water aggregate and admixtures. a strip of Fiberweb sheeting was placed between freshly prepared specimens and already existing, plain and air entrained concrete slabs. This combination remained at ambient temperature for a period of 14 days and 28 days and then evaluated for adverse effects.

No changes in 14 days
No changes in 28 days

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