Sarnafil® S 327-72 Feltback EnergySmart
72 mil thick PVC thermoplastic membrane
Sarnafil® S 327-72 Feltback EnergySmart Roof Membrane is a PVC thermoplastic membrane produced with an integral polyester reinforcement for high strength, is highly reflective, with heat‐weldable seams, and a unique lacquer coating applied to the top of the membrane to reduce dirt pick up.
- Highly reflective
- Excellent tear strength resistance
- Factory applied lacquer coated to reduce dirt pick up
- Hot‐air welded seams for long‐term performance
- Proven membrane performance
- Superior fire resistance
Usage
Used in mechanically attached applications with various fastening methods, over various substrates. It can also be used in adhered applications to approved substrates. AREAS OF APPLICATION- New Roofs
- Reroofs
- Recovers
Advantages
- Highly reflective
- Excellent tear strength resistance
- Factory applied lacquer coated to reduce dirt pick up
- Hot‐air welded seams for long‐term performance
- Proven membrane performance
- Superior fire resistance
Packaging
72 mil (1.8 mm) Membrane
10 ft x 80 ft (3 m x 24 m) roll, 419 lbs (190 kg) per roll,
8 rolls per pallet
Colour
- Top: White, Tan, and Reflective Gray
- Bottom: Gray
Product Details
APPROVALS / CERTIFICATES
- FM Global
- Underwriters Laboratories
- Underwriters Laboratories of Canada
- ICC Code Compliance – ESR 1157
- Miami‐Dade County
- Florida Building Code
- NSF/ANSI 347: Platinum Certified
- California Title 24
- LEED / Green Globes
- CGSB-37.54-95. Type 4/Class B
- CSA-A123.21
Composition / Manufacturing
High‐quality, PVC membrane containing ultraviolet light stabilizers, flame retardant and polyester scrim reinforcement with a unique lacquer coating on the top surface.
Recycled content
9% Pre‐consumer, 1% Post‐consumer
Reinforcing Material
Polyester
Shelf Life
N/A
Storage Conditions
Store rolls on pallets and fully protected from the weather with clean canvas tarpaulins. Unvented polyethylene tarpaulins are not accepted due to the accumulation of moisture beneath the tarpaulin in certain weather conditions that may affect the ease of membrane weldability.
Overall Thickness
| 72 mil (minimum thickness) 45 mil | (ASTM D-751) (ASTM Type III D-4434 Spec. Requirement) |
Thickness Above Scrim
| 35 mil 16 mil | (ASTM D-7635) (ASTM Type III D-4434 Spec. Requirement) |
Felt Weight
9 oz/yd2
Resistance to Static Puncture
| Pass 33 lbf (15 kg) | (ASTM D-5602) (ASTM Type III D-4434 Spec. Requirement) |
Resistance to Dynamic Puncture
| Pass 14.7 ft-lbf (20 J) | (ASTM D-5635) (ASTM Type III D-4434 Spec. Requirement) |
Tensile Strength
| 315 lbf (1401 N) 200 lbf (890 N) | (ASTM D-751) (ASTM Type III D-4434 Spec. Requirement) |
Tear Strength
| 48.5 lbf (216 N) 45 lbf (200 N) | (ASTM D-751) (ASTM Type III D-4434 Spec. Requirement) |
Seam Strength
| Pass 75% of original2 | (ASTM D-751) (ASTM Type III D-4434 Spec. Requirement) |
2 Failure occurs through membrane rupture not seam failure.
Linear Dimensional Change
| ‐0.13% 0.5% | (ASTM D-1204) (ASTM Type III D-4434 Spec. Requirement) |
Solar Reflectance
| EnergySmart Colors | Initial Solar Reflectance1 | 3-Year Solar Reflectance1 |
| EnergySmart White2 | 0.84 | 0.76 |
| EnergySmart Tan2 | 0.73 | 0.65 |
| EnergySmart Reflective Gray2 | 0.73 | 0.66 |
1 Solar Reflectance testing according to ASTM C1549.
2 Meets LEED, Green Globes, and California’s Title 24 criteria for Low and Steep Slope applications.
Solar Reflectance Index
| EnergySmart Colors | Initial Solar Reflectance Index1 | 3-Year Solar Reflectance Index1 |
| EnergySmart White2 | 105 | 93 |
| EnergySmart Tan2 | 89 | 78 |
| EnergySmart Reflective Gray2 | 90 | 80 |
1 Solar Reflectance Index calculated according to ASTM E1980.
2 Meets LEED, Green Globes, and California’s Title 24 criteria for Low and Steep Slope applications.
Thermal Emittance
| EnergySmart Colors | Initial Thermal Emittance1 | 3-Year Thermal Emittance1 |
| EnergySmart White2 | 0.86 | 0.85 |
| EnergySmart Tan2 | 0.85 | 0.86 |
| EnergySmart Reflective Gray2 | 0.89 | 0.88 |
1 Thermal Emittance testing according to ASTM C1371, Slide Method.
2 Meets LEED, Green Globes, and California’s Title 24 criteria for Low and Steep Slope applications.
Low Temperature Flexibility
| Pass Pass ‐40°F (‐40°C) | (ASTM D-2136) (ASTM Type III D-4434 Spec. Requirement) |
Weight Change after Immersion in Water
| 1.8% ± 3.0% | (ASTM D-570) (ASTM Type III D-4434 Spec. Requirement) |
Resistance to UV Exposure
| 10,000 hours 5,000 hours | (ASTM G-154) (ASTM Type III D-4434 Spec. Requirement) |
| Cracking (7x magnification) | None |
| Crazing (7x magnification) | None |
Retention of Properties after Heat Ageing
| Tensile Strength, % of original: Pass Elongation, % of original: Pass Tensile Strength, % of original: 90 Elongation, % of original: 90 | (ASTM D-751) (ASTM D-751) (ASTM Type III D-4434 Spec. Requirement) |
Application
APPLICATION
Sarnafil S 327 is rolled out after proper preparation of the approved substrate and fastened to the roof deck with appropriate mechanically attached system with Sarnafasteners in accordance with Sika’s technical requirements. Sarnafil S 327 seams are heat‐welded together by trained operators using hot‐air welding equipment. Different mechanically attached systems require different application methods. Please consult Sika’s Specifications or Applicator Handbook for detailed installation procedures.
