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Product Information Sheet
F50 PolyShield
180 Poly BasePly Sheet

USES: F50 PolyShield is used to construct built-up roofing and waterproofing membranes. These membranes form a water shield over such structures as roofs, foundations, and decks.

DESCRIPTION: F50 PolyShield is an asphalt coated polyester base sheet. Select raw materials have been formulated into an asphalt coated, 180 gram polyester sheet. In addition, PolyShield is a patented breakthrough achieved by Fields in polyester BUR technology. The polyester in PolyShield provides maximum elastic performance against thermal shock, the daily expansion and contraction of a membrane caused by temperature changes. Membranes made weak from the assault of thermal shock cycles begin to break apart. PolyShield is your best defense against these attacks. With PolyShield, your roofing and waterproofing membranes will perform much longer. PolyShield has an Underwriters Laboratories (UL) Class A Fire Rating when installed in specified systems.

DIRECTIONS: Store F50 PolyShield on end. Keep protected from damage and exposure to humidity or water. Install base sheet with PolyShield, the substrate is required to be firm, clean, dry, and smooth. Apply the PolyShield so that the flow of water is over or parallel to the seams. Lap the PolyShield 2" on the side laps and a minimum of 4" on the end laps. Extend the PolyShield to the head of all cants. Secure the PolyShield to the substrate by either nailing or adhering. Nailed base sheets, use nails with 1" heads and nail the PolyShield 9" on center on both the outside edges and the seams. Also, nail two rows 12" in from each edge on 18" centers, and alternate the nails in each row so that they are offset from each other. Adhered base sheets, apply either Fields hot asphalt or ambient asphalt and lightly broom the base sheet into the asphalt as it is unrolled. Hot asphalt installations, apply either MT3 RubrPac or T3 MeltPac at the rate of 25 Ibs per 100 square feet. Ambient asphalt installations, use either M150 RubrSeal, M100 RubrCoat, or F100 PowrCoat at the rate of 5 gallons per 100 square feet. Install an extra sheet of PolyShield in valleys and waterways. This extra sheet shall extend at least 8" up the inclines of valleys and be applied as specified for adhered base sheets. Install ply sheet with PolyShield, the base sheet or substrate is required to be firm, clean, dry, and smooth. Apply any one of the following as the ply sheets: M60 RubrPoly, M64 RubrPoly2, F50 PolyShield, M62 RubrGlas, M66 RubrGlas2, F52 GlasBase2, F56 GlasPly6, F54 GlasPly4, or F55 PolyShield2. Install the ply sheets parallel to the base sheet so that the flow of water is over or parallel to the seams. Apply 2,3, or 4 ply sheets in shingle fashion on the correct laylines. Start by cutting and installing the starter strips and continue by installing the ply sheets in a uniform interply application of either MT3 RubrPac or T3 MeltPac at the rate of 25 Ibs per ply sheet per 100 square feet: Or, M150 RubrSeal, M100 RubrCoat, or F100 PowrCoat ambient asphalt at the rate of 5 gallons per ply sheet per 100 square feet. Make end laps a minimum of 4". Adjacent end laps shall be offset at least 12" apart. Lightly broom the ply sheets into the asphalt as they are unrolled. Install the surface coating with-PolyShield, the ply sheets are required to be firm, clean, dry, and smooth. Adhere an extra base flashing strip of PolyShield on all flashings at the same rate of asphalt as required for adhering base sheets. Extend the extra base flashing a minimum of 2" above the head of the cants and a minium of 4" beyond the toe of the cants. Then, uniformly coat the entire surface with any one of the following: MT3 RubrPac, T3 MeltPac, MI50 RubrSeal, M100 RubrCoat, F100 PowrCoat, M700 RubrGard, or F700 PowrGard. For hot asphalt coatings, apply 25 Ibs per 100 square feet. For ambient asphalt coatings, apply 5 gallons per 100 square feet. For maximum protection and reduced energy costs, apply M800 RubrStar over the asphalt coating. Allow the asphalt coating a minimum of 90 days to set up before applying RubrStar.

SPECIFICATIONS: F50 PolyShield exceeds the standards of the American Society for Testing and Materials ASTM D 2178 for ply sheets and ASTM D 4601 for base sheets except ash.

TYPICAL TEST DATA:
Number of Rolls Per Pallet 30
Roll Dimensions and Size 40" x 64.8' = 216 sf
Typical Finished Roll Weight 56 lbs
Net dry mass-coated sheet minimum (lb/100 ft) 14.5
Mass of desaturated polyester mat min grams/sq meter 180
Parting agent and stabilizer max % 65
Asphalt minimum (lb/100 ft2) 7.0

PHYSICAL REQUIREMENTS:
Breaking strength min (lbf/in) logitudinal and transverse 44
Pliability (1/2 in) radius maximum failures, 10 specimens 0

 

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