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Polyurethane Grout

Mountain Grout Strong

polyurethane grout project

What Is Polyurethane, Generally?

Polyurethane is a polymer composed of organic units joined by carbamate, or urethane, links. Polyurethane polymers are most commonly formed by reacting a di-or triisocyanate with a polyol.

They can be found in almost all aspects of daily life, from the steering wheel in your car to the cushion in your desk chair. More examples are insulation panels, high performance adhesives, surface coatings and sealants, skateboard wheels, and, of course, those used in the construction industry for soil stabilization, crack injection, slab jacking, and concrete repair.

What Kind of Polyurethane Grout Systems Does Green Mountain International Provide?

Green Mountain International provides high quality polyurethane grouts that reacted to fill voids both large and small. All products are made in America and meet the most rigorous quality control standards in the industry.

Our product line can be as diverse as conditions dictate. Formulations from one-half pound density to sixty pound density with reaction profiles from three seconds to several minutes are available. We offer both single component and dual component formulations as well as hydrophobic and hydrophilic resins for all your polyurethane grouting needs.

Mountain Grout resins can address hairline cracks, large voids, and loose soils alike. Our products have been used in all fifty states as well as over 40 countries worldwide.  Mountain Grout’s polyurethane grouting products are shipped as non-hazardous, non-flammable and, in most cases, can be delivered anywhere within the lower 48 states within a few days.

Which Mountain Grout Polyurethane Grouting Resin is the Best For Your Application?

The answer depends on several factors, but the two most important questions are where are you putting it and how quickly do you want it to react?

For soils and hairline cracks, installers must use a very tin (low viscosity) resin, such as Mountain Grout Soil Stabilizer or Mountain Grout HL-100. The reason is that thicker resins might not penetrate the tight space before reacting and they won’t do any good if they’re not in the desired location.

While low viscosity resins don’t make the most voluminous foam, those site conditions don’t require much foam, just enough to fill the tiny void in the soil or crack. For larger voids, a thicker resin, such as Mountain Grout Flexible or dual componentMountain Grout Void Filler may be more appropriate.

If the job is a potable water job, Mountain Grout Flexible is UL Classified. If an installer is facing a large volume leak and needs something to react in seconds, Mountain Grout ISP is likely the polyurethane of choice.

Here are some other repair job site conditions to consider:

Air Temperature:  Like any chemical reaction, colder temperatures slow the reaction and warmer temperatures speed it up. Air temperatures should be above freezing, preferably above 50°F. If an installer desires a faster reaction profile in cold weather, he can use double Accelerator (5%) or heat the material to no higher than 90°F. If an installer desires a slower reaction in hot weather, he may omit Accelerator altogether or refrigerate the material to keep it cool.

Water Temperature:  Cold water can slow the reaction of the resin, while hot water can speed the reaction along. If an installer desires a faster reaction profile in cold water, he can use double Accelerator (5%) or heat the material to no higher than 90°F. If an installer desires a slower reaction in hot water, he may omit Accelerator altogether or refrigerate the material to keep it cool. pH of water on site: A pH as low as 3 may slightly slow the reaction of the hydrophobic grout but it will still react and cure.

Presence of water:  Water is necessary to react single component polyurethane grouts. If no water is present in the crack or void, you should introduce it to the area or use a dual component formulation such as Mountain Grout VF or Mountain Grout ISP. Do not put water directly into a single component resin before pumping, as it will clog the pump with reacted polyurethane. Only a minimal amount of water is needed (2.5% is ideal), so simply wetting the crack or void should be adequate.

Wet/Dry cycles:  If the area experiences wet/dry cycles, it is likely best to use a hydrophobic grout (Classic, Flexible, SLV, HL-100, Ultra) as hydrophilic grouts (Gel Foam I and II) can shrink in dry cycles and not fully regain their size. If water is ever-present, hydrophilic resins can be a good choice where installers need high elongation (a highly flexible foam).There are many factors that impact the choice in resin and choosing the wrong resin can end up costing owners and installers much more money than necessary. The best choice is to call Green Mountain International and ask to speak to one of our Technical Representatives to see which polyurethane grout resin is best suited for your unique site conditions.

How Do You Work Safely With Mountain Grout – Polyurethane Grouting Products?

Always start by reading the Safety Data Sheet (SDS) for the particular product(s) you plan to use. Up-to-date versions are available on the homepage of this website 24/7.

If the product is being handled in a way that could generate airborne vapors, an air supplied respirator should be utilized unless the air is tested and shown to be safe. There should be good ventilation on any job where chemical grouts are used. If in confined spaces, installers should wear full face respirators and use fans to circulate air.

Organic vapor masks protect well for specific materials but most have no signal to designate they have exceeded their capabilities. As with all respirators, it is important to be properly trained and approved for wearing a respirator.

Other personal protective equipment, such as gloves and protective eyewear, should always be used where there is any chance of exposure to the liquid. It is also a good idea to wear long pants and sleeves to protect against skin exposure when possible.

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Green Mountain Grout International LLC, Member of the ICRI & Member of the ASDSO.