specs

D. Test adhesion to materials in the field prior to application.
Section 07920
Page 3
3.02 PREPARATION
A. Building joints shall be examined prior to application and conditions detrimental to achieving a positive,
weather-tight seal shall be reported to the Contractor and the Architect.
B. Openings, joints, or channels to be sealed shall be thoroughly clean, dry and free from dust, oil, grease,
loose mortar, or other foreign matter. Do not use an air compresser to clean the joints.
C. Surfaces with protective coatings with which the sealant will come in contact, such as new aluminum or
bronze, shall be wiped with xylol, or a methyl ethyl ketone solvent to remove the protective coating and
oil deposit that may be left on the metal surfaces.
D. Where joints are deeper than 1/2", joint backing shall be used and packed into the joint to within 1/2" of
the surface. Where joints are 3/4" wide, place the backing so that the depth of joint to receive sealant is
one half the width.
E. Concrete or masonry joint surfaces shall be wire brushed.
3.03 APPLICATION OF SEALANTS
A. Location of different types of sealants shall be as follows:
1. Type 1 Polyurethane Sealant - To be used at exterior joints in horizontal surfaces,
subject to traffic.
2. Type 2 Polyurethane Sealant - To be used for exterior joints in vertical surfaces points
indicated on the Drawings, around window and door frames abutting masonry on both
interior and exterior of frames, and other locations specified elsewhere. Install color
exterior caulk at panel joints after building has been painted. Caulk shall change
colors as required to match adjacent panel field color. Do not paint caulk.
3. Type 3 Silicone Sealant - To be used at auditorium floor pour joints and saw-cut
control joints.
4. OMITTED
5. Acrylic Latex Caulk - At interior joints except around exterior door and window
frames. Use to caulk interior trim prior to painting.
6. Expansion Joint Filler - To be used in exterior paving joints, and in vertical and
horizontal building expansion joints, as shown on drawings. To be used with sealant at
joint surface.
B. Mix materials in strict accordance with the manufacturer's instructions.
C. Insert joint backing materials in excessively deep joints to within 1/2 the joint width of the surface of the
joint.
D. Insert expansion joint filler in accordance with new manufacturer's written instructions.
E. Prime surfaces to be sealed with sealant primer in accordance with the sealant manufacturer's
instructions.
F. Materials must not be changed and shall be used as they come from the manufacturer's containers.
G. Apply materials with gun nozzle of sufficient size to render a neat, smooth joint.
H. Apply compound with sufficient pressure to completely fill voids. Leave joint slightly convex. Seal
joints to be weather tight.
I. Finish joints in inside corners with finger, using soapy water.
J. Remove excess sealant and clean sealant from adjacent surfaces.
K. Prevent damage or discoloration to adjacent surfaces.
L. Complete sealing before finish painting is started.
3.04 CLEAN-UP
A. Clean adjacent materials which have been soiled, immediately after sealing the joint, and leave in a neat,
clean, unsoiled condition.
B. Remove excess materials and debris from the job site.
C. Refer to Section 01710 -Cleaning.
END OF SECTION
NAPA CENTURY CENTER XD 12
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