Mule-Hide Products Co. has introduced the next generation of its Helix® Max Low-Rise Adhesive – Dual Tank. The two-component, construction-grade polyurethane foam roofing adhesive, packaged in two-tank sets, now features a hydrofluoroolefin (HFO) blowing agent, making it significantly better for the environment while also enhancing its performance.

The adhesive still provides the strong adhesion, the exceptional elongation and tensile strength, and the quick, volatile organic compound (VOC)-free application that Helix Max Low-Rise Adhesive – Dual Tank has become known for. Like the previous formulation, it is designed to bond approved roof insulations, thermal barriers, cover boards and fleece-back membranes (TPO, PVC, and PVC KEE) to a variety of roofing substrates.

More Eco-Friendly

The new HFO blowing agent replaces the previous hydrofluorocarbon (HFC) blowing agent.

“HFOs are the most environmentally friendly option available,” said Kurt Fago, product category manager – low-slope roofing for Mule-Hide Products, explaining that they drastically reduce the adhesive’s global warming potential (GWP) and contain zero ozone depleting particles (ODPs). “Their use is an important step in minimizing the climate impact of the commercial roofing industry.”

The new formula complies with new regulations requiring the use of HFO blowing agents in pressurized two-part urethane foams and adhesives. The policies were implemented recently in several states in the United States and all 10 Canadian provinces, and similar rules are expected to be enacted across most of the United States in the coming years.

Enhanced Performance

The switch to an HFO blowing agent also improves the adhesive’s performance in significant ways. The coverage rate is greater than other canister-based insulation and membrane adhesives. The string time has been increased and is more obvious, giving contractors a longer open window for installation. The gun tip has been redesigned to provide a more consistent splatter application. The new formula also can be used at higher elevations.

Familiar Features

The new HFO formula continues to provide the familiar high-performance, crew-friendly attributes of Helix Max Low-Rise Adhesive, including a VOC-free, self-contained system; quick application; superior wind uplift performance; exceptional puncture-resistance; and elongation of up to 150%.

The change in blowing agent does not affect Helix Max Low-Rise Adhesive packaged in cartridges, 5-gallon jugs, and 15- and 50-gallon drums, as those package types do not utilize a blowing agent.