SpecPoxy CJ 100% Solids, Semi-Rigid Epoxy Control Joint Filler

SpecPoxy CJ is a 100% solids, two-component semi-rigid epoxy control joint filler designed for filling sawcut and construction joints in industrial concrete floors.

It is engineered to support joint edges and reduce spalling caused by forklift and heavy wheel traffic. Unlike rigid epoxies, it maintains controlled flexibility, allowing moderate joint movement while still transferring load across the joint.

It is commonly used in warehouses, manufacturing facilities, and industrial floors where joint protection and durability are critical.

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Key Features

• 100% solids semi-rigid epoxy system
• 1:1 easy mix ratio
• Supports joint edges and prevents spalling
• High elongation for controlled movement
• Moisture-insensitive curing system
• Semi-rigid (does not become brittle)
• Optimized hardness for wheel load transfer
• Designed for industrial concrete floors

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Applications

Common Uses

• Filling control joints in concrete floors
• Construction joint repair
• Repair of spalled joint edges
• Crack and joint stabilization
• Industrial floor joint protection
• Warehouse and distribution centers
• Manufacturing facilities

Works On

• Sawcut control joints
• Construction joints
• Industrial concrete slabs
• Warehouse flooring systems
• High-traffic concrete floors

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Packaging

• 2-gallon units
• 10-gallon units

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Shelf Life

• Approximately 2 years when stored properly
• Store tightly sealed in original containers
• Keep in cool, dry environment
• Avoid moisture contamination and extreme heat

Test Data

• Complies With: ACI 302 guidelines for “Epoxy Joint Filler”.
• 100% Solids: Semi-rigid epoxy control joint filler.
• Pot Life at 75°F: 20 minutes.
• Tack-free at 75°F: 6-8 hours.
• Shore A Hardness: 90±5 (ASTM D2240).
• Tensile Strength: 910 psi (ASTM D638).
• Tensile Elongation: 60-70% (ASTM D638).
• Adhesion to Concrete: Adhesion failure to concrete.

Cleaning

• Uncured material can be removed with SpecChem Solvent 100 or other approved solvents.
• Dispose of in accordance with local, state, and federal disposal regulations. Cured material requires mechanical removal.

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Frequently Asked Questions

What is SpecPoxy CJ used for?

SpecPoxy CJ is used to fill and protect control and construction joints in industrial concrete floors.

Does SpecPoxy CJ prevent joint spalling?
Yes. It supports joint edges and reduces spalling caused by forklift and heavy traffic loads.

Is SpecPoxy CJ rigid or flexible?
It is semi-rigid, allowing limited movement while still transferring wheel loads.

Can SpecPoxy CJ be used in warehouses?
Yes. It is commonly used in warehouses and distribution centers with heavy traffic.

What is the mix ratio of SpecPoxy CJ?
It has a simple 1:1 mix ratio (Part A to Part B).

Can SpecPoxy CJ be used in wet conditions?
Yes. It is moisture-insensitive and can cure in damp environments.

How is SpecPoxy CJ installed?
It is poured or pumped into joints, overfilled, then ground or cut flush after curing.

Does SpecPoxy CJ bond to concrete?
Yes. It bonds strongly to properly prepared concrete surfaces.

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Technical Data Sheet (TDS Summary)

Product Type
Semi-rigid epoxy control joint filler

Physical Properties
100% solids epoxy system, gray, 1:1 mix ratio

Performance Characteristics

• High elongation resistance to tearing
• Supports heavy wheel traffic
• Reduces joint edge breakdown
• Moisture insensitive curing
• Controlled flexibility (semi-rigid system)

Application Method
Mix equal parts → pour into clean sawcut joints → overfill → allow to cure → grind or saw flush

Usage Notes

• Joints must be clean and dry
• Remove dust, debris, and curing compounds before installation
• Do not install over backer rod unless specified

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Safety Data Sheet (SDS Summary)

Hazard Classification
Two-component epoxy system – may cause skin and eye irritation

Health Hazards

• Skin irritation
• Eye irritation
• Sensitization from prolonged exposure
• Respiratory irritation from vapors during mixing

Flammability

• Non-flammable (typical epoxy system)

PPE Requirements

• Safety goggles
• Chemical-resistant gloves
• Protective clothing recommended
• Ventilation during mixing and application

Safe Handling

• Avoid skin contact
• Do not inhale vapors
• Wash thoroughly after handling
• 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