Application Guide for Helicopters - GORE SKYFLEX Aerospace Materials

United States


Proven by more than 20 years of successful applications, GORE SKYFLEX Aerospace Materials are lightweight materials that provide a no-cure seal for panels, fairings, and floorboards while protecting surfaces against vibration damage. They remain flexible and compliant over multiple open/close cycles, providing durable protection against corrosion and the ingress of water, fuels, and oils.

GORE SKYFLEX Aerospace Materials are engineered from expanded Polytetrafluoroethylene (ePTFE). These products are available in a form-in-place tape or die-cut gasket and with options for materials resistant to fuels, oils, and hydraulic fluids.

To prevent chafing damage caused by the abrasion of the aircraft’s panels against airframe structure, GORE SKYFLEX Aerospace Materials expanded PTFE tape installed between panel and structure provides a durable, low-friction barrier to absorb effects of airframe vibration.

Benefits

  • Easy installation from single-component material
  • No curing reduces manufacturing cycles and maintenance downtime
  • Less replacement and re-work of seals by maintaining performance over multiple open/close cycles
  • Improved sealing of irregular surfaces with highly conformable materials
  • Durable protection against mechanical forces, extreme temperatures, fluids, and other environmental hazards
  • Low environmental impact from non-hazardous waste

Suggested areas for applications are presented in Table 1. For more information or assistance in selecting the right materials for your application, contact your Gore representative.

Applications

  • Access panels
  • Anchor nut gaskets
  • Antenna gasket fastener seal
  • Body fairings
  • Cargo floorboards/structure
  • Dry-bay gasket
  • Engine cowling
  • External fuel tanks
  • Fuel bladder cavity
  • Engine cowling
  • Helicopter tail boom
  • Lamp seal
  • Passenger floorboards
  • Pitot tube
  • Windshields/Windows

GORE SKYFLEX Aerospace Materials

  • 720 and 730 Series Tapes are effective at sealing access panels and protecting against abrasion and aviation fluids.
  • Die cut gaskets provide precision sealing for fuel and environmental sealing applications.
  • 1600 Series tape protects structure and coatings with a durable, wear-resistant surface.
  • 110 Series tape seals windshields and panels with no cure time, enabling quick installation and replacement.

The examples presented in this document were applied using Gore’s best practices for installing GORE SKYFLEX Aerospace Materials. In addition, instructional videos are available.

GORE SKYFLEX Aerospace Materials - Applications for Helicopters

GORE SKYFLEX Aerospace Tapes and Gaskets are significantly easier to install than polysulfide FIP seals. They eliminate cure time for sealing and protective materials, significantly reducing manufacturing cycles and direct maintenance time. These materials do not require special equipment or training to install. In addition, their unique construction enables them to maintain their protective performance over multiple open/close cycles, which

translates to fewer replacements and re-work of seals and significant savings in personnel time during production and maintenance.

Unlike traditional two-component materials, Gore’s materials require no mixing, masking or clean-up after installation. In addition, the non-hazardous material reduces environmental impact, disposal costs, and improves safety for installation personnel.

Table 1: Comparison of GORE SKYFLEX Aerospace Materials

Property Material Sets
100
Series
110
Series
200
Series
500
Series
520
Series
700
Series
720
Series
730
Series
1600
Series
Abrasion/anti-chafe
protection
+ + + ++ ++ ++ ++ ++ ++
Corrosion protectiona + + + + + + + + +
Environmental sealing + + + + + + + +  
Gap-filling + + + + + + + +  
Jet fuel sealing         ++   ++
(gasket
preferred)
   
Property Material Sets
100
Series
110
Series
200
Series
500
Series
520
Series
700
Series
720
Series
730
Series
1600
Series
Gap-filling compensation
range – single layer (mm)
.15 to 2.0 .5 to 3.5c .5 to 3.0 .28 to 9.6 .3 to 2.5 .15 to 1.4 .2 to 1.2 .15 to 1.4  
Low Compressive Forces ++ ++ ++ + + + + +  
High Compressive Forces + + + ++ ++ ++ ++ ++  
Vibration + + + ++ ++ ++ ++ ++ ++
Frequent opening,
access
+ + + ++ ++ ++ ++ ++ ++
Aviation fluid exposureb         +   + ++  
Jet fuel exposure         ++   ++ +  
Property Material Sets
100
Series
110
Series
200
Series
500
Series
520
Series
700
Series
720
Series
730
Series
1600
Series
Best uses Big gaps, low
compressive
forces
Big gaps,
very low
compressive
forces
Gap-filling Gaskets
> 19 inches
Fuel seals
> 18 inches
Most
applications,
especially
high vibration
or repeated
access
Areas with
repeated
exposure to
hydrocarbons
Areas with
repeated
exposure to
aviation fluids
Surface
protection – no
compression
required. Floorboard
edges
Available forms Tape Tape Tape Gasket Gasket Tape,
Gasket
Tape,
Gasket
Tape Tape

a Protection of applied corrosion-inhibiting compounds on surface from scratching, protection of surface from standing fluids, and isolation of dissimilar materials (galvanic)

b Sustained exposure to hydraulic fluids, including SKYDROL®, engine and turbine oils, and deicing fluids.

c Gap-filling capability (width) is less than width of tape.

 

Note: This document is only a guide, and procedures in the current version of the technical orders supersede examples presented in this document.

NOTICE — USE RESTRICTIONS APPLY
Not for use in food, drug, cosmetic or medical device manufacturing, processing, or packaging operations.

GORE, SKYFLEX and designs are trademarks of W. L. Gore & Associates. © 2017 W. L. Gore & Associates, Inc.
SKYDROL is a registered trademark of Eastman Chemical Company.

SKY-0309-REF-US-APR17