Vapor Retarder TA 138

• FM Global
• Underwriters Laboratories
• Florida Building Code
• Meets ASTM D6164, Type I, Grade S 
• Tested according to ASTM E108
• Tested according to ANSI/FM 4474 for wind uplift
• Tested according to Miami-Dade TAS 114 for wind uplift

SBS polymer modified bitumen with a non-woven polyester mat reinforcement and fine mineral aggregate (sand) topside and polyolefin burn-off film underside

N/A

Store rolls on end and maintain in an upright position to prevent damage. Store rolls in a clean dry location and cover as necessary to protect rolls from environmental damage such as extreme cold, heat, or moisture.

Peak load @ 0°F (-18°C)

Peak load @ 73.4°F (23°C)

Elongation at peak load @ 0°F (-18°C)

Elongation at peak load @ 73.4°F (23°C)

Ultimate elongation @ 73.4°F (23°C)

Compound stability

All surfaces must be clean, sound, dry, and free of loose materials and laitance, or contaminants such as water, frost, ice, oil, and grease that would interfere with proper adhesion and compromise the performance of the product.

In accordance with the ICRI Technical Guideline No. 310.2R-2013, newly poured concrete surfaces must be finished by forming, wood float, steel or power trowel, or broom finished to meet the equivalency of a CSP type surface between a rating of 2 – 5.

Application to structural concrete surfaces and approved primed gypsum boards require priming with Vapor Retarder Primer TA or Vapor Retarder Primer BE. See Vapor Retarder Primer TA or Vapor Retarder Primer BE product data sheet for additional information.

Torch applied products should only be installed by trained personnel. It is imperative that the NRCA safety guidelines, as outlined in their Certified Roofing Torch Applicator Program (CERTA) and good industry practices be followed.
Chalk a line on the deck to align the first sheet. Unroll Vapor Retarder TA 138 and allow the sheet to relax. Align the side lap with the chalk line. Back roll the sheet halfway. Begin torching the bottom side of Vapor Retarder TA 138. As the bitumen begins to soften pull the roll forward with a metal pole.
When heated properly there should be a bleed out of approximately ½" (1.3 cm). Back roll the other half of the roll and repeat the process.
Kick out the next roll and align the side lap. Side laps must be a minimum of 3" (7.6 cm). End laps should be a minimum of 6" (15.2 cm). Stagger adjacent end laps a minimum of 12" (30.5 cm). Cut the lower outside corner of the end lap at a 45° angle to minimize material build-up where it will be covered by the next roll.
When heating the membrane move the torch in an ‘L’ pattern to ensure heating of the lap area on the bottom sheet. Proper heating will create approximately a ½" (1.3 cm) bleed out. Walk in the seam area or use a weighted roller to ensure proper adhesion and bleed out. Ensure that all laps are firmly and smoothly adhered without wrinkles, voids or fishmouths.
Check the seams with the edge of a trowel. Any loose areas should be lifted with the trowel, reheated and pushed back down to achieve the necessary bleed out.
Apply Sika’s Mastic to seal around penetrations. Use a trowel to mound Sika’s Mastic around the penetrations to seal the opening. Do not apply Sika’s Mastic where it may come into direct contact with the Sarnafil® or Sikaplan® membrane.