Saw-Cut Control Joint Sealing & Edge Protection
Protect slab saw-cuts from debris compaction, edge spalling under hard wheels, and water infiltration into subgrades with CHEMPU semi-rigid and elastomeric joint sealants.
Sawing Depth & Spacing Mechanics
Control joints pre-determine contraction crack locations. Early-entry dry cut or wet diamond saw cut to a minimum depth of T/4 (25% slab thickness) within 12–24 hours of slab pour.
- Relieves drying shrinkage stresses in planned, clean geometric saw cut lines
- Saw-cut width typically 3–5 mm: prevents random uncontrolled surface cracks
- Strict compliance with ACI 302.1R Guide for Concrete Floor and Slab Construction
Full-Depth Sealant Injection & Shoulder Support
Unlike expansion joints that require a backer rod for movement, contraction control joints subject to hard wheel traffic require full-depth sealant to support the brittle joint shoulders.
- Full-depth filling prevents wheel edge impact from breaking sharp concrete corners
- Semi-rigid shore hardness provides 100% shear load transfer across the saw-cut
- SL-100 self-leveling viscosity completely encapsulates saw-cut fines and irregularities
Shoulder Protection Under Heavy Traffic
In modern distribution hubs, narrow-aisle reach trucks and hard polyurethane wheels impose 5+ MPa contact pressure directly on joints. CHEMPU protects shoulders from shattering.
- Shore A 38–42 hardness creates a flush continuous runway for high-speed forklifts
- ±25% movement capability accommodates continuing slab hydration shrinkage
- Dramatically reduces forklift mast maintenance and wheel gouge replacements
Long-Term Low Maintenance Slab Sealing
Properly sealed control joints prevent dirt, grit, and moisture from accumulating in saw cuts, preventing joint raveling and ensuring clean, hygienic commercial operations.
- Meets FDA / USDA requirements for food manufacturing, beverage and cleanroom floors
- Resistant to power floor scrubber detergents and enzymatic sanitizers
- 15+ year operational lifespan with minimal maintenance intervention
Pouring Industrial Slabs or Logistics Flooring?
Contact our floor joint engineering team for saw-cut joint sizing, sealant meter calculations, and contractor pricing.
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