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SECTION 07 90 00
JOINT SEALER
 
 
Copyright 2018 - 2018 ARCAT, Inc. - All rights reserved
** NOTE TO SPECIFIER ** Sashco Sealants, Inc.; products.
.
This section is based on the products of Sashco Sealants, Inc., which is located at:
10300 E. 107th Pl.
Brighton, CO 80601
Toll Free Tel: 800-289-7290
Tel: 303-286-7271
Fax: 303-286-0400
Email: request info (webmaster@sashco.com)
Web: www.sashco.com
[ Click Here ] for additional information.
At Sashco, we pride ourselves on delivering best-in-class home improvement solutions for people who care about doing things right. We are passionate about helping our customers succeed, so whether you have a question about which product to use for your home DIY project, how to do the job right, where to find Sashco products, or something completely different, we're here to help.
Lexel Sealant is Super-elastic with Superior adhesion. Paintable. It seals around anything: tubs and shower stalls, sinks and counter tops, window frames and door frames, PVC and metal pipes. Apply to wet or dry surfaces, indoors and outdoors.
It's tough and can handle up to 400% joint movement. It's scrubbable. It sticks to just about anything. Lexel clear sealant is 19 times clearer than silicone and won't yellow or cloud up over time. Lexel won't let you down.
 
PART 1 GENERAL
 
1.1
SECTION INCLUDES
 
** NOTE TO SPECIFIER ** Delete items below not required for project.
 
A.
Sealant and joint backing
1.2
REFERENCES
 
** NOTE TO SPECIFIER ** Delete references from the list below that are not actually required by the text of the edited section.
 
A.
ASTM C 603 - Standard Test Method for Extrusion Rate and Application Life of Elastomeric Sealants.
B.
ASTM C 661 - Standard Test Method for Indentation Hardness of Elastomeric Type Sealants by Means of a Durometer.
C.
ASTM C 679 - Standard Test Method for Tack-Free Time of Elastomeric Sealants.
D.
ASTM C 719 - Standard Test Method for Adhesion and Cohesion of Elastomeric Joint Sealants Under Cyclic Movement (Hockman Cycle).
E.
ASTM C 734 - Standard Test Method for Low-Temperature Flexibility of Latex Sealants After Artificial Weathering.
F.
ASTM C 794 - Test Method for Adhesion-in-Peel of Elastomeric Joint Sealants
G.
ASTM C 1250 - Standard Test Method for Nonvolatile Content of Cold Liquid-Applied Elastomeric Waterproofing Membranes.
H.
ASTM D 1565 - Specification for Flexible Cellular Materials-Vinyl Chloride Polymers and Copolymers (Open-Cell Foam).
I.
ASTM D 1667 - Standard Specification for Flexible Cellular Materials - Poly (Vinyl Chloride) Foam (Closed-Cell).
J.
ASTM D 2202 - Standard Test Method for Slump of Sealants.
1.3
DESIGN / PERFORMANCE REQUIREMENTS
A.
Adhesion Test: Sealant shall be Adhesion Tested in conformance with ASTM C 794 for use over the following materials:
1.
Metals:
a.
Aluminum
b.
Copper
c.
Brass
d.
Silver
e.
Steel
2.
Plastics:
a.
ABS
b.
PVC
c.
Lexan
d.
Polycarbonate
e.
Vinyl
f.
Fiberglass
g.
Nylon
h.
Acrylic Sheet
i.
Plexiglass
3.
Other Surfaces:
a.
Asphalt
b.
Concrete
c.
Glass
d.
Wood
e.
Corian
f.
Cement
g.
Thinset
h.
Stone
i.
Drywall
j.
Stucco
k.
EIFS
l.
Brick
m.
Mortar
n.
Ceramic Tile
o.
Formica
p.
Fiber Cement
q.
Alkyd Stain
r.
Cloth/Canvas
s.
Porcelain
B.
Do not use for the following applications:
1.
Areas of submersion where there is animal life (i.e. aquariums)
2.
With polystyrene insulation
3.
Containment applications
4.
Plastics not listed should be tested for compatibility before use
5.
Will not adhere to or is incompatible with Aquaseal, cultured marble, Kynar, polypropylene, polystyrene foam insulation, polyethylene, rubber, silicone, styrofoam, vulcanized rubber, waxes
1.4
SUBMITTALS
A.
Submit under provisions of Section 01 30 00 - Administrative Requirements.
B.
Product Data: Manufacturer's data sheets on each product to be used, including:
1.
Data indicating sealant chemical characteristics, performance criteria.
2.
Preparation instructions and recommendations.
3.
Storage and handling requirements and recommendations.
4.
Installation methods.
C.
Verification Samples: For each finish product specified, two samples, minimum size 3 inches (76 mm) long, representing actual product, and color.
D.
Manufacturer's Certificates: Certify products meet or exceed specified requirements.
1.5
QUALITY ASSURANCE
A.
Manufacturer Qualifications: Company specializing in manufacturing products specified in this section with minimum three years documented experience.
B.
Installer Qualifications: Company specializing in manufacturing products specified in this section with minimum three years documented experience.
C.
Preinstallation Conference: Conduct conference at Project Site.
 
** NOTE TO SPECIFIER ** Include a mock-up if the project size and/or quality warrant taking such a precaution. The following is one example of how a mock-up on a large project might be specified. When deciding on the extent of the mock-up, consider all the major different types of work on the project.
 
D.
Mock-Up: Provide a mock-up for evaluation of surface preparation techniques and application workmanship.
1.
Locate in areas designated by Architect.
2.
Determine preparation and priming requirements based on manufacturers recommendations; take action necessary for correction of failure of sealant tests on mock-up.
3.
Refinish mock-up area as required to produce acceptable work.
4.
Accepted mock-ups shall be comparison standard for remaining Work
1.6
DELIVERY, STORAGE, AND HANDLING
A.
Store products indoors in manufacturer's unopened, properly labeled packaging until ready for installation.
B.
Store and dispose of solvent-based materials, and materials used with solvent-based materials, in accordance with requirements of local authorities having jurisdiction.
1.7
COORDINATION
A.
Coordinate installation of joint sealants with cleaning of joint sealant substrates and other operations that may impact installation or finished joint sealant work.
1.8
PROJECT CONDITIONS
A.
Maintain environmental conditions (temperature, humidity, and ventilation) within limits recommended by manufacturer for optimum results. Do not install products under environmental conditions outside manufacturer's absolute limits.
1.9
WARRANTY
A.
Provide with the Manufacturers standard Limited Lifetime Warranty.
PART 2 PRODUCTS
 
2.1
MANUFACTURERS
A.
Acceptable Manufacturer: Sashco Sealants, Inc., which is located at: 10300 E. 107th Pl.; Brighton, CO 80601; Toll Free Tel: 800-289-7290; Tel: 303-286-7271; Fax: 303-286-0400; Email: request info (webmaster@sashco.com); Web: www.sashco.com
 
** NOTE TO SPECIFIER ** Delete one of the following two paragraphs; coordinate with requirements of Division 1 section on product options and substitutions.
 
B.
Substitutions: Not permitted.
C.
Requests for substitutions will be considered in accordance with provisions of Section 01 60 00 - Product Requirements.
2.2
APPLICATION
 
** NOTE TO SPECIFIER ** Edit the following paragraphs as required for the project.
 
A.
Kitchens and bathrooms, including fixtures, countertops and backsplashes
B.
On wallpaper edges to prevent curling
C.
Around trim, windows, doors, thresholds, sills, siding, vents, pipes and air conditioners
D.
Around leaky duct work
E.
Do not use for the following applications:
1.
Areas of submersion where there is animal life (i.e. aquariums)
2.
With polystyrene insulation
3.
Containment applications
4.
Plastics not listed should be tested for compatibility before use
5.
Will not adhere to or is incompatible with Aquaseal, cultured marble, Kynar, polypropylene, polystyrene foam insulation, polyethylene, rubber, silicone, styrofoam, vulcanized rubber, waxes
2.3
MATERIALS
A.
Sealant: Lexel sealant as manufactured by Sashco Sealants, Inc.
1.
Typical Properties:
a.
Joint Size: Maximum 2 inches
b.
Clarity (NTU): < 13
c.
Radon Barrier: Stops 94 percent
d.
Application Range: 0 degrees F to 120 degrees F (minus 18 degrees C to 49 degrees C) surface temperature.
e.
Service Range: -30 degrees F to 200 degrees F (minus 34 degrees C to 93 degrees C) .
f.
Freeze-Thaw Stability: Won't freeze.
g.
Tensile Properties:
1)
Recovery at 50 percent stretch: 96 percent in 1 minimum.
2)
Recovery at 100 percent stretch: 96 percent in 1 minimum.
h.
VOC:
1)
Clear and White: 384 - 395 g/L
2)
Clear is VOC exempt in all 50 states and Canada
3)
Low VOC White: 40.7 g/L, < 4 percent by weight
2.
Test Data:
a.
Durability: 25 percent total joint movement, 10 cycles @ minus 15 degrees F (26 degrees C).
b.
Hardness, Shore A 25 (21-day cure) ASTM C 661
c.
Slump < 1/8 inch ASTM D 2202
d.
Solids 55.9% by weight ASTM C 1250
e.
Extrusion Rate 80 g/min (1/8 inch orifice at 40 psi) ASTM C 603
f.
Cured 1 week (dependent on temperature, ASTM C 679 humidity and bead size/thickness)
g.
Tack-free Less than 30 minutes ASTM C 679
h.
Low Temp. Flexibility Pass (not artificially weathered) ASTM C 734
3.
Color:
 
** NOTE TO SPECIFIER ** Select color required and delete those not required. Note that Lexel Clear is available in all 50 states; Lexel White is not available in California and 13 other states; and Lexel White VOC is available only in CT, DE, DC, IL, IN, ME, MD, MA, MI, NH, OH, NJ, NY, PA, RI, VT, VA.
 
a.
Clear
b.
White (White not available in CA)
c.
White VOC compliant
4.
Packaging:
a.
10.5 oz. plastic cartridges
b.
5 oz. squeeze tubes
5.
Coverage:
a.
A 10.5 oz. cartridge will yield approx. 26 lineal feet with a 1/4 inch (6 mm) bead.
6.
Paintability:
a.
With latex paint/stain after 24-48 hours or oil-based paint/stain after 3-4 weeks
2.4
ACCESSORlES
A.
Joint Cleaner: Non-corrosive and non-staining type, recommended by sealant manufacturer; compatible with joint forming materials.
B.
Remove any old caulk, especially silicone or silicone residue. Use a silicone remover such as McKanica Silicone Caulk Remover.
C.
Joint Backing: Round foam rod compatible with sealant; ASTM D 1565, open cell PVC or ASTM D 1667, closed cell PVC; oversized 30 to 50 percent larger than joint width.
PART 3 EXECUTION
 
3.1
EXAMINATION
A.
Do not begin installation until substrates have been properly prepared.
B.
Verify substrate surfaces and joint openings are ready to receive work
C.
If substrate preparation is the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding.
3.2
PREPARATION
A.
Clean surfaces thoroughly prior to installation.
B.
Remove loose materials and foreign matter impairing adhesion of sealant.
C.
Clean joints. Cut away any loose materials or old caulking. Any existing silicone should be completely removed to ensure proper adhesion.
D.
Perform preparation in accordance with ASTM C 1193.
E.
Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions.
3.3
INSTALLATION
A.
Install in accordance with manufacturer's instructions.
B.
Large beads applied in hot weather (above 95 degrees F) may exhibit slight bubbling. For best results, apply out of direct sunlight.
C.
Prepare frosty or icy surfaces by cleaning with alcohol.
D.
If using indoors, make sure the room is well-ventilated.
E.
Natural shrinkage may give some joints a concave appearance.
F.
Multiple applications may be needed to fill the joint flat.
G.
If dirt or oils are present on the substrate, wash with any household cleaner, rinse to remove and allow to thoroughly dry.
H.
Remove any old caulk, especially silicone or silicone residue. Use a silicone remover such as McKanica Silicone Caulk Re- mover.
I.
Insert backer rod into joints deeper than 1/2" to provide for proper sealant depth and a stronger, longer lasting seal.
J.
Use a Squeeze Tube or Cartridge to apply Lexel into the joint.
K.
Tool for a smoother bead using a caulking tool or a soapy finger and a light, skimming touch.
L.
Clean adjacent soiled surfaces.
3.4
PROTECTION
A.
Protect installed products until completion of project.
B.
Protect sealants until cured.
C.
Touch-up, repair or replace damaged products before Substantial Completion.
END OF SECTION