01 March 2005
NAVAIR 01-1A-509-1
TM 1-1500-344-23-1
TO 1-1-689-1
Seal - An adhesive agent, such as sealant, used to
Unacceptable Response - A detrimental abnormality
close or secure parts to prevent leaks. Seals may also
in system performance.
be created by compressive interference, such as O-
rings, plugs, and interference fit fasteners.
Undesirable Response - A tolerated interruption of
normal performance.
Sealant - A continuous thick film, with low cohesive
strength, which prevents the passage of liquids or
Uniform Surface Corrosion - Corrosive etching of
gasses.
metal involving only the surface.
Shelf Life - The length of time an unopened container
V
can be stored at the recommended storage temperature
and still retain the properties required by the specification.
Viscosity - The degree to which a fluid resists flow
under an applied force.
Solvent - A liquid substance capable of dissolving or
Void Seal - A seal used to fill holes, channels, and other
dispersing another substance.
voids in a fuel tank. The void seal provides continuous
sealing, while a fillet seal would be interrupted by
T
structural gaps.
Tack-Free Time - The length of time required for a
Volatile Organic Compound (VOC) - Compounds in
curing sealant to lose its surface tackiness.
paints and solvents that dissolve into the air. VOC
content is restricted in many materials due to
Thixotropic - A property of certain gels to liquefy when
environmental regulations.
shaken or stirred and then return to a hardened state
upon standing.
W
Titration - A method or process of determining the
Water Spotting - The change in surface appearance
concentration of a dissolved substance by adding to it
resulting from the action of water standing on the paint
a standard reagent of known concentration in carefully
film or substrate. Spotting usually is caused by water
measured amounts until a reaction (color change or
sensitivity of the coating, although the defect can be the
electrical measurement) is completed.
result of dissolved material deposited as water
evaporates.
Top Coat -The final paint film applied to a surface.
Wet Edge - The ability of a wet coating to blend
Total Environment - The circumstances and conditions
smoothly together in the overlap areas during application.
which surround and influence the equipment. The total
environment includes manufacturing, storage, shipping,
Wet Installed Fastener - Fasteners that have sealant
mission, maintenance, and repair.
applied to the shank and under the head prior to
installation to provide a corrosion barrier and secondary
U
seal.
Ultraviolet (UV) Light - Light of a wavelength band
Wrap Around - The phenomenon by which electrically
shorter than visible light but longer than X-ray radiation.
charged paint droplets curve around the rear side of the
Longer wavelength UV from the sun causes sunburn.
object being painted.
Shorter wavelength UV from unfiltered UV lamps can
damage unprotected eyes.
Glossary-8