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SECTION 09 97 23
CONCRETE AND MASONRY COLOR TREATMENT
 
 
Copyright 2016 - 2017 ARCAT, Inc. - All rights reserved
** NOTE TO SPECIFIER ** Nawkaw Corporation; and NawTone-K Mineral Stain products.
.
This section is based on the products of Nawkaw Corporation, which is located at:
370 Commerce Blvd.
Athens, GA 30606
Toll Free Tel: 866-462-9529
Tel: 706-355-3217
Fax: 706-355-9199
Email: request info (info@nawkaw.com)
Web: www.nawkaw.com
[ Click Here ] for additional information.
Nawkaw Corporation is an international company that manufactures, sells and applies proprietary stain products to masonry and concrete surfaces, such as brick, block, mortar, pre-cast, stucco and EIFS. Nawkaw is recognized as the International market leader and is responsible for establishing this niche industry. Nawkaw currently offers a full range of coloring products and services.
This specification includes Nawkaw's NawTone Stain and NawTone+PLUS Water Repellent Stain and Nawkaw NewTone-L mineral stains.
NawTone Stain is in use on more buildings than any other masonry stain in the world. Nawkaw with its 25 year track record of performance and continuous testing and improvements, has set the standard for excellence in the industry. In fact, Nawkaw installation teams have won more awards with this product than any other. NawTone+PLUS adds color and a high-performance water repellent to vertical concrete and masonry surfaces. Because it allows moisture vapors to escape, it prevents spalling or similar failures due to moisture trapped in the wall. It also protects vertical concrete and masonry surfaces against deterioration caused by airborne chemicals like acid rain.
Nawkaw's new line of Lithium-based stains are available in a 40 designer colors and we can match custom colors. But what really makes this product so remarkable is how it reacts with concrete. The lithium forms a chemical bond with the concrete, actually making it stronger, for a permanent color solution ideal for concrete masonry and pre-cast concrete!
 
PART 1 GENERAL
 
1.1
SECTION INCLUDES
 
** NOTE TO SPECIFIER ** Delete items below not required for project.
 
A.
Water Based Stain
B.
Mineral Stain
1.2
RELATED SECTIONS
 
** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required.
 
A.
Section 03 30 00 - Cast-in-Place Concrete.
B.
Section 03 11 16.13 - Concrete Form Liners
C.
Section 03 35 23 - Exposed Aggregate Concrete Finishing.
D.
Section 03 41 16 - Precast Concrete Slabs.
E.
Section 03 45 13 - Faced Architectural Precast Concrete.
F.
Section 03 47 13 - Tilt-Up Concrete.
G.
Section 03 49 00 - Glass-Fiber-Reinforced Concrete.
H.
Section 03 50 00 - Cast Decks and Underlayment.
I.
Section 04 20 00 - Unit Masonry.
J.
Section 04 40 00 - Stone Assemblies.
K.
Section 09 24 13 - Adobe Finish.
1.3
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 744 - Standard Specification for Prefaced Concrete and Calcium Silicate Masonry Units.
B.
SCAQMDR 1168 - South Coast Air Quality Management District's (SCAQMD) Volatile Organic Content (VOC) Rule 1168 for Adhesive and Sealant Applications.
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.
Product characteristics.
2.
Preparation instructions and recommendations.
3.
Storage and handling requirements and recommendations.
4.
Application methods.
 
** NOTE TO SPECIFIER ** Delete selection samples if colors have already been selected and specified herein or indicated on the Drawings.
 
C.
Selection Samples: For each finish product specified, two complete sets of color chips representing manufacturer's full range of available colors.
D.
Verification Samples: For each finish product specified, two samples, minimum size 3 inches (76 mm) square, representing actual product and color.
E.
Environmental Regulations: Submit certification stating the masonry stain material to be applied is in compliance with federal, provincial and local environmental Volatile Organic Compounds (VOC) regulations.
F.
Manufacturer's Certificates: Certify products meet or exceed specified requirements.
1.5
QUALITY ASSURANCE
A.
Manufacturer Qualifications: A manufacturer with a minimum of 20 years experience in the production the stains and coatings of type specified.
B.
Installer Qualifications: Installer licensed by Nawkaw to apply the stain products specified and with a minimum of 3 years documented experience in applying stains and coatings similar in type and scale to this Project.
 
** 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.
 
C.
Mock-Up: Provide a mock-up for evaluation of surface preparation techniques and application workmanship.
1.
Finish areas designated by Architect.
2.
Prepare samples in an area where they will be exposed to the same conditions as will be present on the building during curing.
3.
Allow samples to cure a minimum of three days before obtaining approval.
4.
Samples should be viewed from a minimum distance of 20 feet.
5.
Do not proceed with remaining work until color and finish is approved by Architect.
1.6
DELIVERY, STORAGE, AND HANDLING
A.
Store products in manufacturer's unopened packaging until ready for installation.
B.
Store and handle products in accordance with requirements of manufacturer.
C.
Store materials inside if possible, away from sparks or open flame. Store in a secure area to avoid tampering and contamination. Water based materials must be kept from freezing.
D.
Store and dispose of hazardous materials, and materials contaminated by hazardous materials, in accordance with requirements of local authorities having jurisdiction.
1.7
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.
1.8
WARRANTY
A.
Provide with manufacturer's standard 25 year limited warranty.
PART 2 PRODUCTS
 
2.1
MANUFACTURERS
A.
Acceptable Manufacturer: Nawkaw Corporation, which is located at: 370 Commerce Blvd.; Athens, GA 30606; Toll Free Tel: 866-462-9529; Tel: 706-355-3217; Fax: 706-355-9199; Email: request info (info@nawkaw.com); Web: www.nawkaw.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.
 
** NOTE TO SPECIFIER ** Edit the following Concrete and Masonry stain paragraphs as required for the project. Delete the paragraphs that are not applicable.
 
2.2
WATER BASED STAIN
 
** NOTE TO SPECIFIER ** NawTone is a hydrous, multiple polymer formulation of resin solids, color pigments and a specially formulated tint base, combined to achieve a wide range of colors designed to exhibit the overall characteristics of being: light fast, UV resistant penetrating, aspiratory, and quick drying, while being mold, mildew, fungus and weather resistant.
 
A.
NawTone (Formally NECT-90):
1.
General: NECT-90 - Hydrous, multiple polymer formulation of resin solids and color pigments. UV resistant, light-fast and mold, mildew and fungus resistant.
2.
Physical Properties:
a.
Specific Gravity: 1.27 - 1.31.
b.
Viscosity at 72 F (22 C): 70 - 95 KU.
c.
Solids (Weight): 36 to 39 percent.
d.
Solids (Volume): 31 to 34 percent.
e.
pH: 8.5 - 9.5.
f.
Gloss / Sheen: Flat.
3.
Finish:
 
** NOTE TO SPECIFIER ** Select one of the following paragraphs and delete the one not required.
 
a.
Color: To match existing masonry.
b.
Color: Formulate to color as selected by the Owner or Architect.
 
** NOTE TO SPECIFIER ** NawTone+PLUS is a dual-purpose producta stain for masonry and concrete, plus a water repellent. It enables you to color and protect vertical masonry and concrete surfaces in one easy step. NawTone+PLUS repels water and protects the masonry against deterioration caused by airborne chemicals including acid rain. NAWTONE+ allows moisture vapors to escape and therefore does not promote spalling or similar failure due to moisture trapped in the wall.
 
B.
NawTone+PLUS (Formally NWRT-91):
1.
General: Dual-purpose product designed to add color to masonry while repelling water from significantly penetrating the vertical masonry. Water based, multiple polymer formulation of resin solids and color pigments. UV resistant, light- fast and mold, mildew and fungus resistant.
2.
Physical Properties:
a.
Specific Gravity: 1.27 - 1.31.
b.
Viscosity at 72 F (22 C): 70 - 95 KU.
c.
Solids (Weight): 36 to 39 percent.
d.
Solids (Volume): 31 to 34 percent.
e.
pH: 8.5 - 9.5.
f.
Gloss / Sheen: Flat.
g.
Volatile Organic Compound (VOC): Less than 5 percent.
3.
Finish:
 
** NOTE TO SPECIFIER ** Select one of the following paragraphs and delete the one not required.
 
a.
Color: To match existing masonry.
b.
Color: Formulate to color as selected by the Owner or Architect.
2.3
MINERAL STAIN
 
** NOTE TO SPECIFIER ** NawTone-K is a low pigmentation silicate based semi-opaque coating for use on all forms of cementitious substrates. Ideal for use with In-situ and precast concrete walls, soffit elements and structures, blockwork, lightweight concrete, cement, and cementitious building boards. May also be used to provide a low pigment finish on unplastered interior and exterior concrete surfaces to retain the surface texture while concealing stains, repairs, and/ or apply a color finish. Due to the translucent color wash effect of NawTone-K, this product is not suitable to be applied over existing coatings.
 
A.
NawTone-K
1.
General: NawTone-K is a sol-silicate mineral stain solution used to color treat concrete surfaces to provide an opaque, color wash, or semi transparent finish. NawTone-K offers water repellency, vapor permeability, and forms a crystaline bond with the substrate..
2.
Material Specifications: Calculated according to the SCAQMDR 1168
a.
Total Solids: 10-20% based on formulation
b.
Specific Gravity: 1.05-1.20g/mL
c.
Flashpoint: None
d.
Boiling Point: 212 degreesF
e.
Flammability Limits: Nonflammable
f.
Solubility: Water Miscible
g.
pH: Approx. 11
h.
VOC: <0g / liter
 
** NOTE TO SPECIFIER ** NawTone-K maintains the look and feel of natural concrete while disguising blemishes and color variations. Translucency and opacity can be adjusted to suit the final aesthetic requirements. See NawPro Color Charts for color palettes with hues ranging from natural to rustic.
 
3.
Finish:
 
** NOTE TO SPECIFIER ** Select one of the following paragraphs and delete the one not required.
 
a.
Color: Formulate to color(s) as selected by the Owner or Architect.
b.
Color: As selected by the Architect.
PART 3 EXECUTION
 
3.1
EXAMINATION
A.
Do not begin installation until substrates have been properly prepared.
B.
Verify that surfaces to receive Work are structurally sound and fully intact.
 
** NOTE TO SPECIFIER ** Select one or both of the following two paragraphs as applicable. Delete if not applicable.
 
C.
Verify that new masonry and concrete have cured at least 21 days prior to starting Work using NawTone and NawTone + Plus.
D.
Verify that new masonry and concrete have cured at least 47 days prior to starting Work using NawTone K.
E.
Verify that surfaces to receive Work have a neutral pH.
F.
If substrate preparation is the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding.
3.2
PREPARATION
A.
Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions.
B.
Clean surfaces thoroughly prior to installation. Allow surfaces to dry completely before applying coating.
C.
Verify that walls, masonry, concrete, stucco, block split faced/fluted and mortar that may have been treated with any form of chemical/acid wash are neutralized.
 
** NOTE TO SPECIFIER ** Include the following paragraph for existing building surfaces. Delete if not applicable.
 
D.
Verify that masonry, concrete, stucco, block split faced/fluted and mortar units in existing building are structurally sound and fully intact.
E.
Treat alkali or efflorescence with proper neutralizing compounds as recommended by masonry supplier before stain application.
 
** NOTE TO SPECIFIER ** Note that a neutral pH level is required to maintain the manufacturer's Warrantee.
 
F.
Before application verify that the masonry walls have a neutral pH level.
G.
Before application verify that surface to be treated is clean, dry and contains no frozen water.
H.
Mix products as recommended immediately prior to application.
3.3
INSTALLATION
A.
Install in accordance with manufacturer's instructions.
B.
Ensure that stained surfaces are not exposed to rain for at least 24 hours after application.
C.
Apply stain using airless spray pump to help control airborne particles or overspray. If site conditions prohibit spray application, apply by hand; utilizing brushes and rollers.
D.
Do not proceed with Work when ambient temperatures are less than 25 degrees F (4 degrees C) or greater than 110 degrees F (43 degrees C).
E.
Verify color uniformity 12 to 36 hours after application. Recoat areas where blotches, blemishes or imperfections are present.
3.4
FIELD QUALITY CONTROL
A.
After masonry stain has cured a minimum of 12 hours, verify color uniformity. Recoat any area that are unacceptable.
3.5
PROTECTION
A.
Protect installed products until completion of project.
B.
Protect prefinished items, concealed surfaces, finished metal surfaces, operating parts, and labels as required.
C.
Protect shrubs, metal, wood trim, glass, asphalt and other building hardware during application from overspray.
D.
Do not permit mist (if spraying) or liquid to drift onto surrounding properties or parking lots.
E.
Touch-up, repair or replace damaged products before Substantial Completion.
END OF SECTION