Product #3300 Epoxy Block Filler

Advantages

• More durable than latex or acrylic block fillers
• Fills small voids, crevices, and surface imperfections
• Helps produce a smooth, even surface for coating
• Excellent adhesion to masonry block and concrete
• Low odor for use in occupied areas
• Easy trowel or putty-knife application
• Suitable for interior and exterior use
• Meets USDA requirements

Typical Uses

• Concrete masonry unit walls
• Porous masonry block surfaces
• CMU grout joints and mortar-joint leveling
• Poured concrete surface imperfections
• Industrial and institutional wall systems
• Food-processing and cleanable wall systems
• Interior wall preparation
• Exterior wall preparation beneath compatible coatings

Surface Preparation

Surface preparation is critical. The substrate must be clean, dry, sound, and free of curing agents, dirt, dust, grease, oil, coatings, and other foreign materials that may interfere with adhesion.

Concrete and masonry must be properly prepared. Do not leave standing water in joints or voids. Remove loose material and contaminants before mixing or application.

Mixing Instructions

1. Condition the material, substrate, and application area to at least 50°F.
2. Combine 2 parts Part A resin with 1 part Part B hardener by volume.
3. Mix for 3-4 minutes using suitable low-speed mixing equipment.
4. Continue mixing until the material is a consistent color with no streaks.
5. Mix only the amount that can be placed within 20-25 minutes at 75°F.

Limitations

• Do not apply below 50°F.
• The substrate must be properly prepared and free of contaminants.
• Do not leave standing water in joints or voids.
• Coverage is highly dependent on block porosity and void depth.
• Trowel marks must be sanded smooth before topcoating.
• Use compatible seal coats or finish coatings appropriate for the intended service.

Cleanup and Safety

Remove uncured material from skin as soon as possible using soap and water. If soap and water are not sufficient, use a waterless hand cleaner such as Gojo® or Fast Orange®. White vinegar or 91% isopropyl alcohol may help remove remaining uncured epoxy. Strong solvents are not recommended on skin.

Clean tools and equipment promptly with xylene or lacquer thinner before the material cures. Follow the current SDS and use appropriate personal protective equipment, ventilation, fire-prevention practices, and disposal procedures.