Dex-O-Tex Chem-Rez "N"
Chemical Resistant Polymeric Flooring

1.) PRODUCT DESCRIPTION

A) Composition
Dex-O-Tex Chem-Rez "N" is a jointless epoxy flooring which offers chemical resistance which is very superior to that of conventional epoxy floors. Formulated using the most advanced Novolac-epoxy chemistry, Dex-O-Tex Chem-Rez "N" produces a tighter "cross-linking" than other epoxies. As a result, the material resists physical attack from the spillage of a very wide range of acids, alkalis, and solvents. Additionally, Dex-O-Tex Chem-Rez "N" offers resistance to sustained high temperature spillages up to 250°F (120°C) and intermittent spillages up to 350°F (178°C). (Note: Typical epoxy flooring materials soften and deform at sustained temperature in excess of 150°F.)

Due to its specialized chemistry, Dex-O-Tex Chem-Rez "N" is premium priced compared to conventional epoxy floors and should be used only where its superior properties are required.

Chem-Rez "N" is applied either by trowel or broadcast method. It can be installed at thicknesses of 1/8"-1/4" (3,1 mm-6,3 mm), depending upon service requirements. Consult manufacturer for recommendations.

The material may be turned up at bases to form an integral coved base or to line trenches. Dex-O-Tex Chem-Rez "N" is typically specified to include final finish filling and sealing coats available in a range of slip-retardant profiles.

Dex-O-Tex Chem-Rez "N" is manufactured in a wide selection of colors. The material is also available in a multi-colored decorative aggregate application finished with clear coating. This product is known as a Dex-O-Tex Chem-Rez "N-D".

Formulated with environmental requirements in mind, Chem-Rez "N" contains no hydrocarbon solvents and thus meets all state and local volatile organic substance regulations.

In conjunction with a Dex-O-Tex Membrane system, Chem-Rez "N" may be utilized in secondary containment areas.

As an option, Dex-O-Tex Chem-Rez "N" is available in the Dexcide series which incorporates anti-microbial chemistry to control the growth of microorganisms (bacteria, fungi, etc.) on the floor surface.

B) Typical Uses
Chemical/Solvent Storage
Secondary Containment
Battery Storage
Plating Areas
Trenches
Chemical Spillage Manufacturing

C) Advantages – Limitations

Advantages
1. Monolithic, jointless
2. Superior chemical resistance
3. Heat resistant
4. Installed only by approved Dex-O-Tex applicators

Limitations
1. If sub-surface cracks, Dex-O-Tex Chem-Rez "N" may reflect cracks to some degree.
2. Water vapor transmission upwards through on-ground concrete slabs may result in loosening of epoxy floors or improper curing of epoxy materials.

2.) PHYSICAL CHARACTERISTICS AND TECHNICAL DATA

A) Compressive Strength
ASTM D-695
8,740 psi

B) Chemical Resistance
Contact Crossfield Products
Corp. for separate chemical
resistance tables.

C) Temperature Resistance
No measurable softening,
deflection or integrity loss
upon 8 hours immersion in
boiling water (212°F) and
boiling cooking oil (>300°F)

D) Surface Hardness
ASTM D-2240
Durometer "D" 80-85

E) Tensile Strength
ASTM D-638
4,150 psi

F) Flexural Strength
ASTM D-790
8,370 psi

G) Bond Strength
ACI Committee 503.1-92
>400 psi
100% failure of concrete

H) Impact Resistance
ASTM D-2794
Direct 50 in. lbs.
Reverse 15 in. lbs.

I) Water Absorption
MIL-D-3134
Nil (7 day immersion)

3.) INSTALLATION

A) Prepare surfaces by shot blasting, power scarification, etc. to remove laitance, grease, curing agents and other foreign matter.
B) Apply epoxy primer coat.
C) Trowel/broadcast apply Chem-Rez "N" body coat to thickness as specified.
D) Apply grout/filler coat and topcoat in color and profile as selected.

4.) PRODUCT AVAILABILITY

Crossfield Products Corp. maintains offices and/or factories at all addresses listed above. Qualified Dex-O-Tex Contractors established in all major trading areas in the United States, Canada and various European and Far Eastern nations.

5.) MAINTENANCE

Regular scrubbing with ordinary detergents and water flushes in between. During very high temperature spillages or spillages of potentially damaging chemicals, dilute spillages with cold water.

6.) SPECIFICATION ASSISTANCE

Consult Crossfield Products Corp. for specification assistance, detailing, etc. This consultation is highly recommended prior to specification.


SECTION 09670
CHEMICAL RESISTANT NOVOLAC-EPOXY COMPOSITION FLOORING
Dex-O-Tex Chem-Rez N

PART 1.00 - GENERAL

1.01 GENERAL REQUIREMENTS
A. Work of this Section as shown or specified shall be in accordance with the requirements of the Contract Documents.

1.02 WORK INCLUDED
A. Work of this Section includes all labor, materials, equipment and services necessary to complete chemical resistant Novolac-epoxy composition flooring and integral base as selected on drawings and/or specified herein.

1.03 RELATED WORK
A. Concrete - Section 03300. (Note to Specifier: Concrete should be either water cured or cured using sodium silicate curing compounds only. Other types of curing compounds are generally not acceptable. Concrete should be cured for a minimum of 28 days. On grade floors should have functioning vapor retarder beneath slab.)

B. Floor drains - Division 15. (Note to Specifier: Floor drains, clean-outs, etc., should be of the floor-flange type as manufactured for use with composition floors by most major drain manufacturers.)

1.04 SUBMITTALS
A. General: Submit the following in accordance with Conditions of Contract and Division 1 Specification Sections.

B. Product Data: Submit manufacturer's technical data application instructions and general recommendations for the chemical resistant Novolac-epoxy composition flooring specified herein.

C. Chemical Resistance: Submit manufacturer's printed chemical resistance tables indicating that Novolac-epoxy flooring specified herein resists total immersion of cube samples in damaging reagents for a minimum of ninety (90) days testing. Reagents shall include but not necessarily be limited to:

- 50% (concentrated) Sulfuric Acid
- 25% Acetic Acid
- 1,1,1 Trichloroethane
- Methanol (Methyl Alcohol)
- 50% Sodium Hydroxide
- Concentrated Hydrochloric Acid
- 50% Phosphoric Acid
- Acetone
- Concentrated Ammonium Hydroxide

Totally immersed samples shall show no swelling, softening, loss of adhesion, discoloration or deterioration.

D. Samples for initial selection purposes in form of manufacturer's color charts showing full range of colors available.
1. Submit 2-1/2" x 4" samples in color as selected.

E. Material certificates signed by manufacturer certifying that the chemical resistant Novolac-epoxy composition flooring complies with requirements specified herein.

F. Maintenance Instructions: Submit manufacturer's written instructions for recommended maintenance practices.

1.05 QUALITY ASSURANCE
A. Installer Qualifications: Engage an experienced installer or applicator who has specialized in installing resinous flooring types similar to that required for this Project and who is acceptable to manufacturer of primary materials.

B. Single-Source Responsibility: Obtain chemical resistant Novolac-epoxy composition flooring materials, including primers, resins, hardening agents and finish or sealing coats, from a single manufacturer.

1.06 DELIVERY, STORAGE AND HANDLING
A. Deliver materials in original packages and containers with seals unbroken and bearing manufacturer's labels containing brand name and directions for storage and mixing with other components.

B. Store materials to comply with manufacturer's directions to prevent deterioration from moisture, heat, cold, direct sunlight or other detrimental effects.

1.07 PROJECT CONDITIONS
A. Environmental Conditions: Comply with epoxy resin composition flooring manufacturer's directions for maintenance of ambient and substrate temperature, moisture, humidity, ventilation and other conditions required to execute and protect work.

B. Lighting: Permanent lighting will be in place and working before installing flooring.

PART 2.00 - PRODUCTS

2.01 MATERIALS
A. Chemical resistant Novolac-epoxy composition flooring shall be Dex-O-Tex Chem-Rez N as manufactured by Crossfield Products Corp., Rancho Dominguez, California; Roselle Park, New Jersey; Hinsdale, Illinois; Moss Point, Mississippi; Tacoma, Washington.

2.02 PROPERTIES
A. Colors: As indicated, or if not otherwise indicated, as selected by Architect from manufacturer's standard colors.

B. Physical Properties: Provide flooring system that meets or exceeds the listed minimum physical property requirements when tested according to the referenced standard test method in parentheses.

Chemical Resistance
(90 day total immersion)
No swelling, softening, deterioration or discoloration (Note to Specifier: List chemicals expected to be spilled on floor.)

Compressive Strength
(ASTM D-695)
8740 psi

Temperature Resistance
No measurable softening, deflection or integrity loss upon 8 hours immersion in boiling water (212°F) and boiling cooking oil (>300°F)

Surface Hardness
(ASTM D-2240)
Durometer "D" 80-85

Tensile Strength
(ASTM D-638)
4150 psi

Flexural Strength
(ASTM D-638)
8370 psi

Bond Strength
(ACI Committee 503.1-92)
>400 psi

Impact Resistance
(ASTM D-2794)
Direct 50 in. lbs.
Reverse 15 in. lbs.

Water Absorption
(MIL-D-3134)
NIL (7 day immersion)

2.03 SUPPLEMENTAL MATERIALS
A. Waterproofing Membrane: Type recommended or produced by manufacturer of epoxy resin composition flooring system for type of service and floor condition indicated. (Note to Specifier: The use of waterproof membrane is optional and is generally confined to suspended floors and in rooms having floor drains and subject to very wet spillage and service. All areas requiring membrane treatment should be clearly shown on plans and finish schedules.)

B. Anti-Microbial Additive: Incorporate antimicrobial chemical additive to prevent growth of most bacteria, fungi, algae and actinomycetes. (Note to Specifier: The use of antimicrobial additive is optional.)

PART 3.00 - EXECUTION

3.01 INSPECTION
A. Examine the areas and conditions where chemical resistant Novolac-epoxy composition flooring is to be installed and notify the Architect of conditions detrimental to the proper and timely completion of the work. Do not proceed with the work until unsatisfactory conditions have been corrected by the Contractor in conformance with the Contract Documents.

3.02 PREPARATION
A. Substrate: Perform preparation and cleaning procedures according to flooring manufacturer's instructions for particular substrate conditions involved and as specified. Provide clean, dry and neutral substrate for flooring application.

B. Concrete Surfaces: Shot-blast, acid etch or power scarify as required to obtain optimum bond of flooring to concrete. Remove sufficient material to provide a sound surface, free of laitance, glaze, efflorescence and any bond-inhibiting curing compounds or form release agents.

Remove grease, oil and other penetrating contaminates. Repair damaged and deteriorated concrete to acceptable condition. Leave surface free of dust, dirt, laitance and efflorescence.

C. Materials: Mix Novolac-epoxy resin hardeners and aggregates when required and prepare materials according to flooring system manufacturer's instructions.

3.03 APPLICATION
A. General: Apply each component of chemical resistant Novolac-epoxy composition flooring system according to manufacturer's directions to produce a uniform monolithic flooring surface of thickness indicated.

B. Bond Coat: Apply bond coat over prepared substrate at manufacturer's recommended spreading rate.

C. Body Coat: Over bond coat trowel apply body coat to nominal 1/4" thickness; hand or power trowel. When cured, sand or grind if necessary to remove trowel marks and roughness.

D. Finish or Sealing Coats: After body coat has cured sufficiently, apply grout and finish coats of type recommended by flooring manufacturer to produce finish matching approved sample and in number of coats and spreading rates recommended by manufacturer.
1. Final finish coat shall be in color and skid retardant profile in conformance with the Contract Documents.
2. Finished floor shall be 1/4" thick uniform in color and free of trowel marks.

E. Cove Base: Apply cove base mix to wall surfaces at locations shown to form cove base height of 4 inches unless otherwise indicated. Follow manufacturer's printed instructions and details including taping, mixing, priming, troweling, sanding and top-coating of cove base.

3.04 CURING, PROTECTION AND CLEANING
A. Cure chemical resistant Novolac-epoxy composition flooring materials according to manufacturer's directions taking care to prevent contamination during application stages or premature chemical spillage before completing curing process. Close application area for a minimum of 24 hours.