RR401G Hydrophobic | 4lb Concrete Raising Foam

Water is great, except when it’s under your concrete.

rr401G-application-photoRR401G is our latest innovation in perfecting specialized foams for residential, commercial and D.O.T. contractors who are lifting and leveling concrete slabs even when a void is filled with water. This 3-4 pound hydrophobic / hydro-insensitive foam is a two-component polyurethane foam like RR401, but is a gas blown foam product.

We’re often asked, can polyurethane set-up and lift concrete while still maintaining its compressive strength, when it’s pumped under concrete slabs where water is present? The simple answer is “YES!”, most definitely, yes! With the HMI RR401G hydrophobic poly foam, lifting and maintaining lifted concrete is a cinch; no more needing to worry about redoing your work days, weeks, or months later.

» Contact us for a technical data sheet on RR401G

Earns USDA Certified Biobased Product Certification and Label  


Why is hydro-insensitive foam important?

Hydro-insensitive means the presence of water in the soil will not affect the foam’s reaction cure time, compressive strength or performance. Weather and drainage are no longer concerns for contractors or government crews. It also means that traditional delays and costs in completing projects are eliminated, improving your reputation and profitability.


Would you like to learn more about our HMI RR401G Hydrophobic Poly Foam Material?

Contact us for a technical data sheet