System Palette
Epoxy, zinc-rich, polyurethane stacks
Acrylic and hybrid chemistries for clean air permits
Epoxy and hybrid assembly bonding systems
Elastomeric, fire-retardant, and fillers
Cleaners, conversion coatings, maintenance kits
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Bridge Rehabilitation | Zinc/Epoxy/PU Stack
LPTHC protective system delivered long-life corrosion protection on steel bridges with limited closure windows.
Results
- 25-year design life target achieved
- 38% projected maintenance cost reduction
- Accelerated cure kept traffic impacts minimal
- Inspection-ready documentation for DOT
Specification Kit
Color-Coded Data Sheets and Inspection Steps
Every family carries a matching swatch, label, and TDS/SDS bundle to keep purchasers, applicators, and inspectors synchronized.
- Surface prep and DFT targets for QA/QC teams
- Mixing, pot life, and cure windows by product
- Custom formulation pathway for unique substrates
Fast Actions
Challenge
Severe Corrosion with Tight Outage Windows
- Steel bridge structures exposed to salts and weather
- Limited lane closures allowed for coating work
- DOT required long-term performance and documentation
Solution
- Surface prep to NACE/SSPC standards
- LPTHC-Zinc 1000 primer for galvanic protection
- LPTHC-Epoxy 5000 high-build intermediate
- LPTHC-Polyurethane 7000 UV-stable topcoat
Performance Metrics
Corrosion Resistance
Salt fog and immersion testing validated stack durability for bridge environment.
Cycle Time
Rapid cure intervals minimized closure durations while meeting DFT targets.
Documentation
TDS, SDS, and inspection checklists provided for DOT approval and audit.