REPAIR FUEL CELL INTERIOR PLIES
Keep lid on can of barrier cement
(E63.3) when not in use to prevent
evaporation and thickening.
Carefully apply a uniform coat of barrier
cement (E63.3) (5) over previous coat of
repair cement mixture (6). Use a brush (7).
Remove any excess cement from unbuffed
area. Use a clean cloth (E120) and MEK
(E244). Wear gloves (E184.1). Allow barrier
to dry to touch.
Apply a second coat of barrier cement (8)
over first coat at 90º to the application of the
first coat. Use a brush. Allow second coat to
air dry for 30 minutes.
Prepare repair cement (E63.3). (See steps
e and f.)
Carefully apply a uniform coat to repair
cement (9) over previous coats of barrier
cement. Smooth surface with MEK (E244)
and remove any excess cement from
unbuffed area with a clean cloth (E120) and
MEK (E244). Wear gloves (E184.1).
Wet fabric reinforcement patch (2) with MEK
(E244). Shake out excess MEK (E244).
Center wet patch over defect area and press
into wet cement (9) with fingers to make
certain patch is free of air bubbles and loose
Allow cement and fabric patch to air cure
approximately 30 minutes.