What We Look for in Precast Manhole Leak Repair Products

Water infiltration is one of the most common—and costly—problems in precast manholes. Even a small leak can add up to thousands of gallons of clean water entering the sewer system every day. That extra flow translates into higher treatment costs, risk of overflows, and wasted budget dollars that should be going toward other infrastructure needs.

At JLC Construction Services, leak repair is a core service. Here’s what we look for when selecting the right repair products:

1. Active Reaction with Water

The best products don’t just tolerate water—they use it to activate. Crystalline materials or hydrophilic grouts can expand and harden in the presence of water, creating an immediate seal.

2. Bonding Strength

A repair is only as good as its bond. We prefer products that integrate with the concrete substrate, not just sit on top. That ensures long-term durability, even with ongoing groundwater pressure.

3. Compatibility with Epoxy Coatings

Stopping leaks is step one. Many municipalities also add a protective epoxy barrier (like Tnemec Series 61 or Sikadur 32) for long-term protection. We choose products that remain compatible with downstream coatings.

4. Ease of Field Application

Time and conditions matter. We select products that can be applied quickly and effectively—even when surfaces are damp or actively leaking—helping cities save on labor costs.

5. Proven Track Record

Field performance matters most. We rely on products that have a strong history in wastewater environments, protecting both infrastructure and taxpayer dollars.

Helping Cities Stretch Their Budgets

By pairing the right materials with professional installation, we help municipalities reduce treatment costs, extend the life of their precast assets, and redirect savings toward future capital projects.

📞 If your community is dealing with manhole leaks, JLC Construction Services can help. Contact us today to learn more about our testing, repair, channeling, and rehabilitation services across Washington and Oregon.