HydraLiner epoxy-based resins from HammerHead Trenchless Equipment, available in winter, standard and summer blends, are designed for temperature-specific, cured-in-place-pipe lining applications in 2- to 102-inch diameter pipes, as well as drain lines with 90-degree bends.

“We recommend it for mains, sewer laterals and down spouts; anything but pressure pipe and potable water,” says Ryan Boldan, lateral systems product manager for HammerHead.

The 100 percent solids resins have a transparent blue base and transparent yellow hardener that creates a uniform aqua-green color when properly mixed. The combination resin works with felt or fiberglass liner material.

“The nice thing about that [green color] is when you’re wetting out the liner, it makes it readily apparent if you have any air bubbles or spots where you didn’t get full saturation,” Boldan says. “The finished product, when it’s put into the ground, is a much higher quality.”

The winter blend, made for cold conditions, short run or fast cure applications, has a two-hour cure time; the standard blend has a four-hour ambient cure time, while the summer blend, made for long run or large-diameter pipe runs, has a five-hour ambient cure time. Each resin blend is designed for steam, hot-water or ambient curing; times are based on an ambient temperature of 77 degrees F.

“Cure time can be shrunk down to 25 minutes for winter blends, 40 minutes for standard and 60 minutes for summer blends at 194 degrees F,” Boldan says. “And then there’s a range within that depending if you’re doing hot-water curing and the temperature you’re curing at.”

Boldan says one of the unique features of the summer hardener is it’s rated for steam return lines of about 180 to 200 degrees F of constant temperature.

Working time for the winter blend ranges from 12 to 15 minutes; 30 to 35 minutes for the standard blend and 50 to 60 minutes for the summer blend, based on 77-degree F ambient temperature.

“The key variables for working time are the temperature the resin was stored at and the ambient temperature you’re working in,” Boldan says.

The winter and standard hardeners are classified by the Department of Transportation as nonregulated and noncorrosive, minimizing hazardous materials shipping concerns. The resin has up to a one-year shelf life, depending how it’s stored, and is available in 5-gallon pails, 55-gallon drums and 275-gallon intermediate bulk containers (IBC). The HammerHead HydraLiner app, available on iOS, Android and Windows 8 mobile devices, can calculate resin/hardener mixtures and cure times based on project specifications. 800/331-6653; www.hammerheadtrenchless.com.