Advantages

• High-density, true polyurea.
• Excellent elongation in cold conditions.
• Meets FAA P605 and ESS 200 military specifications.
• Drive-over ready in 30–45 minutes.
• Resistant to moisture, chemicals, abrasion, and impact.
• No VOCs, no odor.

Applications

3246 PenJoint is suitable for:

• Expansion joints in parking structures, bridges, and airfields.
• Loading docks, decks, and garage floor joints.
• Cold storage thresholds and other moving expansion joints.

Preparation

1. Ensure concrete has cured for at least 28 days.
2. Abrade joint walls to a depth of approximately 1.25 inches using a diamond saw.
3. Remove contaminants like oils, wax, and curing agents.
4. Clean and vacuum joint walls thoroughly.
5. For optimal bonding, perform an acetone wash after vacuuming.

Priming & Moisture Vapor Reduction

• Use ASTC PenPrime 7001 for best results, especially for large moving joints.
• Pre-treat high moisture vapor areas with ASTC CMW to reduce pressure.

Application

• Use ASTC-recommended 1:1 displacement pumps or LS pumps.
• Warm the product to 72°F before application.
• Fill joints from the bottom up to slightly below grade.

General Physical Characteristics

Additional Features

• Depth: Recommended depth is half the width of the joint over a backer rod.
• Movement Tolerance: Supports up to ±25% movement.
• Cold Conditions: Pre-condition product and equipment for use below freezing.

Limitations

• Do not use on wet surfaces or expose Part A to moisture.
• Store in cool, dry conditions on wood pallets.
• Product is moisture-sensitive; keep away from high humidity environments.

Notes

• This product stays tacky on the surface, making it ideal for top coating.
• Sand or cornstarch can be used to remove surface tackiness.