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Epoxy.com Product #633

Installation Instructions

Novolac Epoxy Coating

System Type: High Chemical Resistance Epoxy Coating

Typical Uses: Secondary containment, chemical processing areas, and industrial floors requiring high chemical resistance.

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1. Scope

These instructions cover the installation of Epoxy.com Product #633 Novolac Epoxy Coating on properly prepared substrates.

This system is intended for applications requiring high chemical resistance in demanding industrial environments.

2. Substrate Requirements

Concrete

• Minimum 28 days cure per American Concrete Institute (ACI) recommendations
• Structurally sound
• Free of laitance, curing compounds, oils, and contaminants

Steel

• Abrasive blast cleaning preferred
• Alternate preparation methods may be used where blasting is not practical. Contact Epoxy.com Technical Support as needed.

3. Surface Preparation

Surface preparation is critical to system performance.

Concrete

• Mechanically prepare by shot blasting or grinding
• Achieve a clean, sound, open surface profile
• Remove all dust and debris

Steel

• Abrasive blast cleaning preferred
• If abrasive blasting is not practical, mechanically clean and prime as required

For additional guidance, see the Epoxy.com Surface Preparation Guide.

4. Priming

Apply an appropriate primer based on substrate and service conditions.

Include one of the following primers as appropriate:

• Product #12 High Chemical Resistance Epoxy Primer/Sealer
• Product #15 High Chemical Resistance Epoxy Primer/Sealer
• Product #899 - used as a primer where appropriate
• Product #660 Aluminum Filled Primer - for steel substrates

Primer selection should be based on substrate type, moisture conditions, and required chemical resistance.

5. Mixing

• Pre-mix each component separately
• Combine in the proper ratio

Mix for a minimum of 3 minutes using a properly sized mixing paddle in a low-speed drill.

• Scrape the sides and bottom of the mixing container during mixing
• Mix until a uniform, consistent material is achieved

Important: After initial mixing, pour into a second container and mix again briefly.

6. Application

Apply by roller, squeegee, or brush.

7. Recoat Window

• Minimum Recoat: 4–12 hours
• Maximum Recoat: 24 hours

8. Cure Schedule

• Light traffic: ~24 hours
• Heavy traffic: ~48 hours
• Full chemical resistance: ~7 days

Lower temperatures will slow cure times.

9. Environmental Conditions

• Minimum substrate temperature: 50°F
• Do not apply at dew point

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Technical Assistance

When in doubt, contact Epoxy.com Technical Support.