Section 3 --- Exterior & Interior Care
The Executive 2005
128
Sealant Types
Acryl-R:
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 avail-
able in a caulking tube. Two colors are available - white and silver. Silver is used on items mount-
ed 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, working 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 specification is 40 to 50 in/lbs. The
base gasket should be compressed to approximately one-half inch.
Acrylic Sealants (geocel 2300):
Used where items are sealed under a painted surface such as the metal corners of slide out rooms.
The material is specially formulated to allow paint adhesion.
Black Urethane:
Used for sealing windshields, not designed to fill holes or other imperfections. Black Urethane is
available in a tube that applies similar to silicone. Clean up using solvents such as paint thinner.
Gloves are required when using this hazardous material.
Silicone:
Primarily used on the sidewalls around windows, doors, handles, beltline molding, latches and
bases of surface mounted items such as clearance lights. Old peeling sealant should be removed
with nylon sticks or equivalent. Metal utensils can scratch the painted surface. Avoid lacquer thin-
ners or ketone based solvents as these chemicals can damage painted surfaces. Confirm that sur-
face is clean and dry before a new application. Cut the tube at an angle with the smallest usable
opening. Avoid a heavy bead. A little goes a long way.
Use finger at a 45° angle on beaded surface to smooth out product. Do not moisten finger, use a
disposable latex glove. Keep rags or paper towels handy for clean up. Use care when applying sili-
cone. Plan ahead before starting a bead, look for obstacles that may impede application.
Spray Foam:
This product is used as a sealant where a hole has been made for items such as water lines or wires
that are coming through a floor opening.
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