Product #633 Chemical-Resistant Novolac Epoxy Coating
98% Solids, Novolac Epoxy Flooring, Wall Coating, and Secondary-Containment System
Product #633 is a high-performance, highly chemical-resistant epoxy novolac coating engineered for floors, walls, secondary containment, trenches, pump pads, process areas, and other demanding industrial environments.
It provides superior resistance to strong acids, alkalies, solvents, and many other industrial chemicals. Product #633 may also be used as a seal coat over compatible epoxy mortar systems where increased chemical resistance is required.
Typical Uses
- Chemical-processing facilities
- Secondary chemical containment
- Solvent-storage and handling areas
- Water and wastewater treatment facilities
- Food and beverage processing facilities
- Pump pads, trenches, curbs, and equipment bases
- Battery-charging and battery-manufacturing areas
- Pulp and paper facilities
- Industrial flooring and wall-coating systems
- Seal coats over compatible epoxy mortar systems
Product #633 Advantages
- Superior resistance to strong acids, alkalies, solvents, and many industrial chemicals
- Higher heat resistance than many general-purpose epoxy coatings
- 100% solids formulation with no drying shrinkage caused by solvent loss
- Zero-VOC Epoxy.com formulation
- Low odor for use in many occupied facilities
- Suitable for wet-process flooring and containment applications
- Meets USDA requirements for incidental food contact when properly installed and fully cured
- May be applied by brush, roller, squeegee, or suitable plural-component airless spray equipment
Composition
Product #633 is a 100% solids, modified cycloaliphatic amine-cured epoxy novolac resin system.
Product #633W is the Epoxy.com wall-grade version for vertical surfaces and other applications requiring increased sag resistance.
Color Selection
Product #633 is available in clear and selected factory-tinted colors. Clear Product #633 is naturally amber.
- Clear and light colors will amber or yellow with age.
- Do not field-tint clear Product #633 with pigment packs.
- Custom colors require laboratory approval and may involve additional cost and longer lead times.
- Request an actual cured sample when color selection is important. Screens, printers, photography, lighting, and surrounding surfaces can alter the apparent color.
Ambering is primarily an appearance consideration and does not normally indicate a reduction in the coating's chemical or mechanical performance.
Technical Data
The following values represent typical laboratory properties for properly mixed and cured Product #633. Published values are intended for product selection and comparison and should not be interpreted as guaranteed minimum field performance.
| Property | Typical Value |
|---|---|
| Solids Content | 98% |
| Cure Chemistry | Modified cycloaliphatic amine-cured epoxy novolac |
| Mixing Ratio | 2 Parts A to 1 Part B by Volume |
| Mixed Viscosity @ 75°F | 1,500–2,000 cps |
| Mixed Weight | 11.0–11.5 lb per gallon |
| Working Life @ 75°F | Approximately 20–25 minutes |
| Minimum Substrate Temperature | 50°F (10°C) |
| Typical Coverage | 160–200 square feet per gallon per coat |
| Typical Film Thickness | 8–10 mils per coat |
| Typical Two-Coat Thickness | 16–20 mils dry-film thickness |
| Gloss (60°) | 100 |
| VOC | 0% / 0.0 lb VOC as published by Epoxy.com |
Values shown are typical laboratory values and should not be interpreted as guaranteed minimums unless specifically stated in a written project specification.
Cure and Service Schedule
The following cure schedule is based on both ambient and substrate temperatures of approximately 75°F (24°C). Lower temperatures extend working, cure, and service times. Higher temperatures shorten them.
| Service Condition | Approximate Time @ 75°F |
|---|---|
| Dry to Touch | 6–7 Hours |
| Recoat / Foot Traffic | 10–12 Hours |
| Light Service | 24 Hours |
| Heavier Service | 48 Hours |
| Full Chemical Resistance | 5 Days |
Cure-Time Warning
Do not expose Product #633 to chemical service until full chemical resistance has developed. Actual readiness for traffic or service also depends upon film thickness, airflow, substrate temperature, installation conditions, and the severity and type of anticipated exposure.
Although Product #633 reaches its published performance properties after approximately seven days under normal curing conditions, epoxy curing continues beyond that point. Lower temperatures extend cure times, while higher temperatures shorten them.
Surface Preparation
Surface preparation is the most critical part of a successful resinous coating installation. All substrates must be clean, sound, dry enough for the intended system, properly profiled, and free of contaminants that could interfere with adhesion.
The substrate temperature must be at least 50°F (10°C). The surface must also remain above the dew point and be free of condensation during application and cure.
Concrete
Concrete must be free of dirt, laitance, grease, oils, waxes, curing compounds, coatings, sealers, dust, and other foreign materials. Prepare the surface by suitable mechanical means such as abrasive blasting or mechanical abrasion. Remove all dust and debris before application.
Acid etching should only be used where appropriate and where all reaction products can be completely removed. Mechanical preparation is generally preferred for demanding chemical-service systems.
Steel — Immersion Service
Remove oil and grease, then abrasive blast to near-white metal in accordance with SSPC-SP10 / NACE No. 2.
Steel — Non-Immersion Service
Remove oil and grease, then abrasive blast to commercial blast in accordance with SSPC-SP6 / NACE No. 3.
Apply the specified primer or coating before visible oxidation or contamination occurs.
Additional surface-preparation and installation information: Product #633 Installation Instructions
Mixing
Product #633 is supplied at a mixing ratio of 2 parts A to 1 part B by volume.
- Pre-mix Part A and Part B separately before combining them.
- Measure or combine the components in the correct 2A-to-1B ratio.
- Mix for approximately three minutes with a suitable Epoxy.com mixing paddle or equivalent using a low-speed drill.
- Move the mixing paddle around the container and scrape the sides and bottom as necessary to obtain a uniform mixture.
- Do not cross-contaminate Part A and Part B containers, tools, or measuring equipment.
- Do not mix more material than can be placed within the available working time.
If Epoxy.com Anti-Skid Fine or Anti-Skid Coarse is incorporated directly into the coating, add approximately 12 volume ounces per mixed gallon and mix until uniformly dispersed. Do not exceed 16 volume ounces per mixed gallon unless specifically approved for the application.
Additional mixing, application, and field guidance: Product #633 Resource Center
Application
Application procedures depend on the substrate, specified system, service conditions, and installation method.
Product #633 may be applied by brush, roller, squeegee, or suitable plural-component airless spray equipment. Conventional single-component airless equipment may not be appropriate because of the material's viscosity and working life.
Priming
When Product #633 is applied over properly prepared concrete or wood, prime with the specified compatible Epoxy.com primer. Product #12 Chemical-Resistant Epoxy Primer is commonly used where the system design requires it.
Priming may be optional over properly prepared steel, depending on the service environment and written system specification.
Coating Application
For a typical coating installation, apply two coats at approximately 160–200 square feet per gallon per coat. This produces approximately 8–10 mils per coat, or 16–20 mils total dry-film thickness for the two-coat system.
Because Product #633 is a 100% solids resin and hardener system, wet-film thickness and dry-film thickness are essentially the same when the material is properly mixed and installed.
Actual coverage varies with substrate profile, porosity, surface condition, application method, installer technique, waste, and specified film thickness.
Detailed procedures: Product #633 Installation Instructions
Chemical Resistance
Chemical resistance depends on the specific chemical, concentration, temperature, exposure duration, frequency, cleaning practices, film thickness, substrate, and total system design.
| Chemical or Reagent | Concentration | Rating |
|---|---|---|
| Acetic Acid | 5% | R |
| Acetone | — | L |
| Ammonium Hydroxide | 38% | R |
| Beer | — | R |
| Bleach | — | L* |
| Brake Fluid | — | R |
| Citric Acid | 30% | R |
| Citric Acid | 40% | L |
| Crude Oil | — | R |
| Diesel Fuel | — | R |
| Ethylene Glycol | — | R |
| Fatty Acids | — | L |
| Gasoline | — | R |
| Hydrochloric Acid | 37% | R |
| Isopropyl Alcohol | — | R |
| Lactic Acid | 50% | R |
| Methyl Ethyl Ketone | — | L |
| Nitric Acid | 10% | R* |
| Orange Juice | — | R |
| Hydrogen Peroxide | 35% | L |
| Phosphoric Acid | 85% | R |
| Skydrol | — | R |
| Sodium Hydroxide | 50% | R |
| Sulfuric Acid | 98% | R |
| Toluene | — | R |
| Urea | — | R |
| Vinegar | — | R |
| Xylene | — | R |
Additional comparisons and selection information: Epoxy.com Chemical Resistance Chart
Performance Properties
The following values are typical laboratory properties for properly mixed and fully cured Product #633. Published values are intended for comparison and product selection and should not be interpreted as guaranteed minimum field performance.
| Property | Typical Value | Test Method |
|---|---|---|
| Tensile Strength | 10,400 psi | ASTM D638 |
| Adhesion to Concrete | 300 psi (100% concrete failure) | ACI Committee 403 |
| Hardness | 86 Shore D | ASTM D2240 |
| Abrasion Resistance | 30 mg loss (CS-17 wheel) | ASTM D4060 |
| Elongation | 2.5% | ASTM D638 |
| Dry Heat Resistance | Up to approximately 180–325°F depending upon exposure conditions | MIL-D-3134F |
Performance properties are typical laboratory values and should not be used as design specifications. Actual field performance depends on surface preparation, installation practices, cure conditions, service environment, and total system design.
Cleanup
Clean skin promptly with soap and water. Clean tools and equipment before the material cures using an appropriate solvent such as xylene or lacquer thinner, where permitted.
Follow all Safety Data Sheet precautions, ventilation requirements, fire-safety rules, and local regulations for solvent use, storage, and disposal.
Maintenance
Clean fully cured Product #633 with compatible neutral soaps or detergents. Cleaning chemicals, concentrations, temperatures, dwell times, mechanical methods, and rinse procedures should be compatible with both the coating and the service environment.
Inspect chemically exposed flooring and containment systems regularly. Repair cuts, impact damage, joint failures, worn areas, or loss of bond before aggressive chemicals can reach the substrate.
Important Limitations and Considerations
- Minimum substrate temperature is 50°F (10°C).
- Lower temperatures substantially increase working, recoat, traffic, service, and chemical-resistance times.
- Do not apply over condensation, standing water, frost, ice, weak concrete, contamination, or an improperly prepared substrate.
- Clear and light colors will amber with age.
- Do not field-tint clear Product #633 with pigment packs.
- Do not expose the coating to chemical service before full chemical resistance has developed.
- Chemical resistance can change with concentration, temperature, exposure duration, mixtures, contamination, and cleaning practices.
- Field conditions differ. Contact Epoxy.com Technical Support when the application differs from the published guidance.
Safety
Read the applicable Safety Data Sheets before handling, mixing, or applying Product #633. Use appropriate gloves, protective clothing, eye protection, ventilation, and other personal protective equipment.
Technical Support
Contact Epoxy.com for assistance with product selection, chemical exposure, surface preparation, system design, mixing, application, cure conditions, specifications, or troubleshooting.
Technical Support: 352-533-2167
Email: norm@epoxy.com
Technical-Data and Warranty Notice
The information and recommendations presented here are based on data and experience believed to be reliable. Because substrate conditions, installation methods, environmental conditions, chemical exposure, and intended service are outside Epoxy Systems, Inc.'s control, the purchaser and installer are responsible for determining that Product #633 and the selected system are appropriate for the particular application.
Published values are typical and may vary. No statement should be interpreted as a warranty of suitability for a particular purpose unless expressly provided in writing by Epoxy Systems, Inc.
