Rapid Flex CJ – Control Joint Filler

Rapid Flex CJ is a 100% solids, two-component, UV-resistant, semi-rigid, rapid-curing polyurea joint filler designed for filling control and construction joints in industrial concrete floors.

It is engineered for high-traffic environments where joint protection, fast turnaround, and durability are critical. The rapid curing system allows joints to be shaved and returned to service quickly, making it ideal for warehouses, distribution centers, and industrial facilities.

It also supports damaged or spalled joint edges and helps extend the life of concrete flooring systems under heavy wheel loads.

Key Features

• 100% solids semi-rigid polyurea system
• Rapid curing for fast floor turnaround
• UV resistant and color stable
• High elongation (~200%) for movement resistance
• Semi-rigid hardness (Shore A ~85) for load transfer
• Prevents joint edge spalling
• Can cure in low temperatures (down to -20°F)
• Fast shaving and return-to-service time
• USDA accepted for food facility use

Applications

Common Uses

• Control and construction joint filling
• Warehouse floor joint protection
• Industrial slab joint repair
• Forklift traffic joint stabilization
• Spalled joint edge repair
• Heavy-duty concrete flooring systems
• Freezer and cold storage floors

Works On

• Sawcut control joints
• Construction joints
• Industrial concrete slabs
• Warehouse and logistics floors
• High-traffic commercial floors

Packaging

• 22 fl oz cartridge systems
• 10-gallon bulk units

Shelf Life

• Approximately 1 year when stored properly
• Store in original sealed containers
• Keep in controlled temperature environment (50–90°F recommended)
• Avoid moisture contamination and freezing conditions
• Protect from direct sunlight and heat

Frequently Asked Questions

What is Rapid Flex CJ used for?
Rapid Flex CJ is used to fill and protect control and construction joints in industrial concrete floors.

Is Rapid Flex CJ rigid or flexible?
It is semi-rigid, allowing controlled movement while transferring wheel loads.

How fast does Rapid Flex CJ cure?
It cures quickly and can typically be shaved within 20–60 minutes depending on conditions.

Can Rapid Flex CJ be used in warehouses?
Yes. It is designed for heavy forklift traffic in warehouses and distribution centers.

What is the hardness of Rapid Flex CJ?
It has a Shore A hardness of approximately 85, ideal for load transfer and durability.

Does Rapid Flex CJ prevent joint spalling?
Yes. It protects joint edges from breaking down under heavy wheel traffic.

Can it be used in cold environments?
Yes. It can be applied and cured in temperatures as low as -20°F.

Do joints need special preparation?
Yes. Joints must be clean, dry, and free of contaminants before installation.

Technical Data Sheet (TDS Summary)

Product Type
Rapid-curing semi-rigid polyurea joint filler

Physical Properties
100% solids, 2-component system, Shore A ~85 hardness

Performance Characteristics

• High elongation (~200%)
• UV resistant and color stable
• Fast cure for quick return-to-service
• Excellent load transfer capability
• Crack and spall resistance

Application Method
Mix 1:1 → dispense into clean joints → overfill → allow to cure → shave flush

Usage Notes

• Ensure proper joint cleaning before installation
• Maintain minimum temperature requirements for application
• Use calibrated dispensing equipment for correct mix ratio

Safety Data Sheet (SDS Summary)

Hazard Classification
Two-component polyurea system – may cause skin and respiratory irritation

Health Hazards

• Skin irritation
• Eye irritation
• Respiratory sensitization possible
• Harmful if inhaled in vapor form during application

Flammability

• Non-flammable product

PPE Requirements

• Safety goggles
• Chemical-resistant gloves
• Protective clothing
• Respirator in poorly ventilated areas

Safe Handling

• Avoid skin contact
• Avoid breathing vapors
• Use ventilation during installation
• Store sealed in original containers

First Aid

• Eyes: Flush with water for 15 minutes
• Skin: Wash with soap and water
• Inhalation: Move to fresh air
• Ingestion: Seek medical attention immediately

Supporting Documents

Technical Data Sheet (TDS)

Sell Sheet

Safety Data Sheet (SDS)