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Introducing FT Synthetics HYDRA, a breathable (16 Perms) synthetic roofing underlayment  designed to add an extra layer of protection from water penetrating your roof and at the same time help the release of trapped moisture due to poor attic ventilation. HYDRA is high strength, light weight, durable for up to 6 months UV exposure and has a lifetime limited warranty. HYDRA includes our slip resistant GRIPSPOT™ technology top surface for superior walkability during installation. HYDRA is a 100% recyclable product.

  • GRIPSPOT Technology for superior slip resistance
  • Durable breathable three layer construction
  • Helps prevent roof deck rot due to poor attic ventilation
  • Safe and easy installation
  • 180 day UV resistant
  • Does not wrinkle or curl
  • Low temperature flexibility
  • 6x stronger and 5x lighter than traditional #30 felt
  • Meets and exceeds ASTM D226 Types 1 & 11
  • Meets and exceeds ASTM D4869
  • NEW! LIFETIME limited warranty
WIDTH48" (1.22 M)
LENGTH250' (76.2 M)
Test and StandardFT SYNTHETICS HYDRA30 Lb. Felt
Material Composition
UV Resistance6 MonthsNA
ASTM D226 Type I & IIMeets or ExceedsMeets
Water shower Exposure ASTM D 4869
Permeability ASTM E96-A
20 Perms
5 Perms
Temperature Range 
-40°F to 240°F
Nominal Thickness ASTM D1777 
30 mils / 0.76 mm
60 mils / 1.54 mm
Slip Resistant Surface
Class A Fire ASTM E108PassNA
The Data shown above is based on the test averages and independent test reports. There can be a +/-10% variation in the individual test results. This report should not be considered as a warranty for the manufacturer. The manufacturer is not responsible for the misrepresentation or misinterpretation of the data by the reader. Please find out more about the product by calling 1-844-353-9839 or visit www.ftsyn.com

Caution: Always follow Safety Instruction, Building Codes and Safe Work Practices issues by the local Govt. bodies (e.g. OSHA / WCB)

Use: FT Synthetics products are a secondary layer protection approved for installation over plywood with proper fasteners on roof slopes 2:12 and greater. Product is a secondary barrier under a primary roofing product such as asphalt shingles, synthetic shingles, metal, tiles, slate, and cedar shakes.

Preparation: Before installing the underlayment ensure that the roof is dry and clear of any debris or any sharp protrusions.

Installation: FT Synthetics underlayment is laid out horizontally with printed side up using 4” horizontal laps and 6” vertical laps. For prolonged exposure where driving rain or strong winds are expected it is recommended to double the overlaps. For low slope applications between 2:12 to 4:12, it is recommended to overlap 50% plus 1”.

Fastening: FT Synthetics underlayment should be installed with plastic or metal (ring shank or smooth shank) cap-nails or cap-staples. Un-capped staples or standard roofing nails may be used if the primary roofing material is installed within 48 hours (unless rain or high winds are expected). Use of un‑capped fasteners may result in a possibility of blow off or leakage around the fasteners.

Exposure: For short term coverage (48 hours) underlayment can be fastened using every other anchoring position as printed on the product. For extended exposure fasten the product using every anchoring position as printed on the product.  All anchoring must be performed flush to the roof, 90 degrees to the roof deck that will hold the material tightly with the plywood. Product has 180 Days UV protection, but it should not be considered a final roofing system. A proper final roofing system should be installed over the product to get the proper protection.

Safety Notification:
FT Synthetics products are designed with the GRIPSPOT technology for better skid protection for the roofer but product may become slippery due to high moisture, frost, rain, water, dust, debris or other conditions. Use precautions when working on the roof. Follow all local and federal safety codes when installing any roofing system including FT Synthetics products. Failure to adhere to those procedures may result in serious injury or even death.

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