Fiber Optic Microtrench Cap Solutions

Real-World Problems. Engineered Solutions. Partnered Execution.

The Final Step That Matters Most

Microtrenching is revolutionizing fiber optic deployment with minimal disruption and faster installs. But success depends on more than just the trench—it’s about how you finish it.

Once cables are covered in slurry, the cap is what stands between long-term reliability and expensive early failure. A weak or incompatible cap leads to water intrusion, pavement degradation, and aesthetic problems that cities and fiber firms can’t afford.

A failed cap essentially turns the trench into a water channel—compromising both the pavement and the fiber infrastructure beneath it.

What Is a Microtrench Cap?

A microtrench cap seals and protects the narrow trench filled with cementitious slurry. The ideal cap should:

Waterproof the trench and bond to slurry without weakening it
Withstand traffic, weather, and UV exposure
Adhere to multiple pavement types—often asphalt-to-concrete transitions
Preserve appearance and pedestrian safety, even near curbs and edge lines
Enable future treatments, like slurry seal or chip seal
Support the 20-year lifespan of buried fiber infrastructure

We created two specialized capping systems—each tailored for different jobsite demands and surface conditions.

TWO PROVEN MICROTRENCH CAP SOLUTIONS:

Camo Mastic

Pumpable. Durable. Designed to Bond Across Surfaces.

Camo Mastic is a high-performance, hot-applied, pumpable mastic formulated specifically for on-gutter trenching and asphalt-to-concrete transitions. Where most mastics fail to bond evenly across different substrates, Camo Mastic excels.

Why It Works:

Strong bond to both asphalt and concrete—ideal for curb-and-gutter situations
Forms a flexible, watertight membrane that protects slurry from intrusion and UV
Pumpable for efficient install—more feet per day, less crew fatigue
Performs in extreme climates: ductile at 40°F, anti-slumping at 170°F
Installs thin (as little as ⅛”) while maintaining strength and stability
Compatible with slurry types and future preservation treatments
Made with 50%+ renewable materials, supporting sustainability goals
Optional sand finish for a flush, aesthetic result that blends with the pavement

Choose Camo Mastic when you need production speed, visual performance, and multi-surface adhesion.

Polyflex DS by Roklin

Cold-Applied. Rugged. Built from Combat-Tested Repair Technology.

Polyflex DS is a cold-applied surface cap derived from Roklin’s legacy of military-grade polyurethane systems, originally designed to repair bomb-damaged NATO airfields in under 30 minutes. Today, that same fast-set performance powers Polyflex DS—engineered for rugged, off-gutter microtrenching applications.

Why It Works:

Cold-applied polyurethane system—no kettle, compaction, or curing required
Bonds tightly to asphalt surfaces, sealing over slurry with minimal disruption
Designed for areas with turning tires, heavy edge loading, or irregular pavement
Flexible formulation delivers greater movement tolerance than traditional patching compounds
UV-stable and highly durable under all weather conditions
Ideal for one-crew field installs, especially on utility cuts or remote segments
Proven in thousands of DOT, military, and municipal projects across the U.S.

Choose Polyflex DS when you need toughness, speed, and minimal setup—especially off the gutter line or in high-load asphalt areas.

Camo Mastic Brochure

Built to Solve Problems—Not Sell Commodities

At Main Street Materials, we’re not just selling trench caps—we’re solving trenching problems. We’ve partnered with chemists, engineers, and contractors to build field-ready solutions that outperform legacy sealants and mastics in the most demanding conditions.

With 28 years of pavement innovation, we understand the interplay between slurry materials, traffic loads, city specs, and long-term durability.

We don’t do one-size-fits-all. We engineer results.