EXTERIOR & INTERIOR CARE — 3
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20 08 CONTESSA
While sealant integrity may appear ne,
a small void under the right conditions can
quickly cause major damage. Make a full
interior inspection for signs of moisture
intrusion every two weeks when the motorhome
is in storage.
CAUTION:
Inspect exterior seals, seams and joints
for sealant integrity at least twice a
year. Make a full interior inspection for
water leaks every two weeks while the
motorhome is in storage.
INSPECTING:
Surface must be clean and dry. Inspect
seal for voids, cracks, bubbling, peeling
or pulling away. Sealant that looks fine
without imperfections is acceptable
for continued service. Sealant that is
old, cracking, flaking or bubbling will
allow moisture intrusion and must be
repaired.
WARNING:
Inspecting sealant will require use of
a ladder or scaffold assembly. Roof
access is also required. Follow proper
safety measures accordingly. Exercise
extreme care whenever using a ladder/
scaffold assembly. Avoid getting on the
roof if it is icy or moisture laden as the
surface can be very slick. Use judgment
if inspection is considered dangerous.
Have the motorhome inspected or sealed
(if necessary) by a qualified service
technician.
Sealant Replacement:
Carefully remove sealant that is cracking,
aking, bubbling, peeling or pulling away from
the surface. The area underneath will need to be
cleaned and dried before applying new sealant.
Applying new sealant over a dirty or moisture
laden surface will not allow proper adhesion.
Sealant application may require simple hand
tools and paper towels or rags for cleanup.
Some sealants may be labeled hazardous or
require chemicals for cleanup. Follow all of the
manufacturer’s warnings and precautions when
dealing with these substances.
WARNING:
Some sealants may be labeled hazardous
or require use of petroleum distillates
for cleanup. Use proper precautions as
suggested by the sealant or chemical
manufactures. Use of protective eye wear,
gloves, respirator or open ventilation
may be required. Use judgment when
working with chemicals. If health limits
exposure to chemicals or inhibits skills
or abilities, employ a qualified service
technician to perform the tasks.
Sealant Types
Acryl-R
®
:
Product Manufacturer Schnee-Moorehead
Part # 5509. Used on all roof openings such
as vents, skylights, roof-mounted antennas and
ladder roof mounts. Sealant should be applied
only where equipment bases meet the roof.
Acryl-R is generally available in a caulking tube.
Two colors are available - white and silver. Silver
is used on items mounted on the forward painted
area of the roof. White is used at all other points.
Remove old sealant that is not adhered.
Sealant that is secured need not be removed.
Dirty or damp surface areas will compromise
sealant effectiveness. Thoroughly clean and dry
the surface area before applying new sealant.
Lay masking tape around the area to be sealed
to stop sealant from spreading beyond the
desired area. Using a caulking gun, apply new
sealant as needed. Work the caulking gun in a
manner that will cause the sealant to fully adhere
to the applied area. Allow adequate cure time.
Roof air conditioners use a closed cell foam base
gasket and do not require sealant. The roof air
conditioners should be regularly inspected for
tightness at the four mounting bolts, one located
in each interior corner of the air conditioner
roof opening. Torque specication is 40 to 50
in/lbs. The base gasket should be compressed to
approximately a ½".
Acrylic Sealants:
Product Manufacturer Geocel Part # 2300
Used where items are sealed under a
painted surface such as the metal corners of
slide out rooms and roof mounted awning
brackets. The material is specially formulated
to allow paint adhesion.
Black Urethane:
Product Manufacturer Bostik Part # 1100
Used for sealing windshields only. Black
Urethane is available in a tube that applies
similar to silicone. Clean up using solvents such
as paint thinner. Gloves are required as this
considered a hazardous material.
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