Rapid Flex CJ – Control Joint Filler

Rapid Flex CJ is a rapid-curing, UV-resistant polyurea control joint filler built for fast turnaround on industrial concrete floors

Rapid Flex CJ is a 100% solids, two-component, semi-rigid polyurea that cures quickly for fast joint shaving, meeting ACI 302 section 4.10 recommendations. It's also effective for repairing damaged joint nosing and cracks.

Key Features & Benefits

• Simple 1:1 mixing ratio with a pourable, pumpable consistency
• UV-resistant, maintaining color integrity (Dovetail Gray when mixed)
• High elongation rate (200%) minimizes tearing from movement
• Semi-rigid flexibility without welding slabs together or becoming brittle with age
• Ideal hardness (Shore A 85) supports wheel load transfer while allowing moderate movement
• USDA accepted; additional architectural colors available

Application Instructions

• Do not thin with solvents
• Clean uncured material from equipment with SpecChem Solvent 100
• Also suitable for repairing damaged joint nosing and cracks

Packaging

Available in 22 oz cartridges.

Supporting Documents

Safety Data Sheet (SDS)

Technical Data Sheet (TDS)