Frequently Asked Questions

Q: How long has Sprayroq been in the market?

Sprayroq™ created its first polyurethane in 1990 in Jacksonville, Florida. Since that time, SprayWall^® has been applied to well over 1,000,000 structures throughout North America, Europe and Asia.

Q: Does Sprayroq Perform the Rehabilitation Services for the Customer?

No, Sprayroq™ is a manufacturer of a line of advanced polyurethane products used in the water, wastewater, and industrial coatings markets. Our products are applied by highly trained Sprayroq™ Certified Partner applicators. A listing of the current Sprayroq™ Certified Partners can be found under the partners tab in our navigation bar.

Q: Do You Sell Sprayroq Products on the Open Market?

At this point, no, all applicators (Sprayroq™ Certified Partners) of the Sprayroq™ product line are exceptionally well trained by our Operations Staff in Birmingham for one full week and for another week in the field about a month after initial training. There is a specific process to using spray applied polymer technology that involves a thorough understanding of water and wastewater system operations, confined space training, surface preparation, equipment maintenance, basic chemistry and spray technique. This is all taught at the SCP training classes.

Q: What Type of Training Will Be Received as a New Sprayroq Certified Partner?

The training begins by your new crew spending a week in Birmingham for intensely-focused training on Sprayroq™ equipment, products, and application techniques. That week consists of several key areas of concentration that will create successful finished projects. These areas of learning include: Safety (note: if Confined Space training is required, Sprayroq™ can arrange that for you at your facility.)

Q: How Can I Become a Sprayroq Certified Partner?

If your company is looking to move to the next level of growth and you have a strong familiarity with the water and wastewater infrastructure issues in your area, you may be positioned to consider Sprayroq™ products as your way of increasing your company revenue stream and profitability while providing a long term infrastructure rehabilitation solution for your community. Contact Sprayroq™ at 800-634-0504 or contact us through our website. Tell us a bit about yourself and your plans for growth.

Q: Will Your SCPs Provide a Demo Project for Our Town?

The SCP understands that the best way for you to evaluate their products and services is to provide a sampling of the work. Just call your local SCP or Sprayroq™ to arrange a demonstration project.

Q: How Do I Find Out if There Is a Sprayroq Certified Partner in My Area?

Refer to the Sprayroq™ Find A Partner page (under the partners tab in or navigation) for the latest listing of North American and other international SCP’s serving your area. You may also call Sprayroq™ directly ay 800-634-0504 for a referral to your local SCP.

Q: What is an SCP?

“SCP” stands for Sprayroq™ Certified Partner. These are highly trained contractors who worked in specific geographic areas. Each SCP has Sprayroq™ trained applicators who understand the need for quality throughout the rehabilitation or corrosion preventive coating process. Only SCP’s may apply Sprayroq™ Products.

Q: Is SprayWall an Epoxy?

No. Most common epoxy resins are produced from a reaction between epichlorohydrin and bisphenol-A. SprayWall^® is polyurethane that is produced from a reaction between a polyalcohols and an Isocyanate.

Q: How is SprayWall's Polyurethane Different From Epoxy Products?

Polyurethanes cure much faster than epoxies and therefore can be applied much thicker in one application. Typically, an epoxy must cure for 6-10 hours. Sprayroq™’s polyurethane products begin curing in about 10 seconds. They reach a tack-free state within 2 minutes and full cure within 4-6 hours.

Q: Are a Polyurea and Polyurethane the Same Thing?

No. Polyurethanes are generally the reaction product of Polyalcohols and Isocyanate. Polyureas result from reacting Polyetheramines and Isocyanates and usually require a primer. Sprayroq™ products normally do not require primers.

Q: What Type of Surface Preparation Is Required Before Using SprayWall Products?

Surface prep is the key to any successful polymer application. Generally, power washing with 5,000 psi water pressure will address most cleaning needs. Sometimes, higher water pressure and/or the use of a biodegradable cleaner may be needed for more difficult cleaning jobs.

Q: How Strong Is SprayWall?

One of the measures of SprayWall^® is known as “flexural modulus”. That is the point in which the sample of material yields under the pressure of a testing device. The rating, measured in pounds per square inch, tells the engineer what the strength of the product may be. Sprayroq™ uses the most conservative numbers to represent flexural modulus. That number is 735,000 psi.

Q: How Long Does It Take for SprayWall to Cure?

The curing process of Sprayroq™ products begins in about 8-10 seconds with what we call “gel time”. A thin skin is formed on top of the freshly sprayed surface which quickly continues to solidify throughout the application. In about 2 minutes, a “tack free condition exists where the product is able to support the weight of the applicator safely while the spray application continues.

Q: Will I Get a Favorable ROI With the Use of SprayWall?

Indeed! This product, in a structural finish, has a 50 year design protocol. Other technologies may not have that same service life expectancy. When municipal funds are being used for rehabilitating vital infrastructure, the taxpayer is entitled to the longest lasting, comprehensive solution available. With its 50 year design life, SprayWall^® will continue working 24/7 while other technologies may have to be reapplied anywhere from 3 to 15 times on that same structure over a 50 year time span.

Q: Does SprayWall Come in Other Colors?

The natural color of SprayWall^® has a golden tone to the finished product, thus we use the phrase, “the Gold Standard” as part of our marketing initiative. As this is part of our identity, we will not change the color of our core products.

Q: How Dry Does a Structure Have to Be Before Applying Sprayroq Products?

The moisture content in the substrate must be less than 18%. Our SCP’s understand the nature of drying a structure efficiently and effectively through use of indirect-fired heating equipment. In addition, Sprayroq™ provides training to our SCPs on the proper methods of surface preparation including moisture mitigation in order to complete projects on time and within budget.

Q: Does SprayWall Control the Corrosive Effects of H2s?

Hydrogen Sulfide is converted to Sulfuric Acid in sewer systems. SprayWall^® is resistant to the corrosive effects of Sulfuric Acid. However, in its Hydrogen Sulfide state, SprayWall^®’s polyurethane formulation controls the destructive nature of the gas.

Q: What is the Key to a Successful Coating or Lining Project Using a Spray Applied Resin?

The key word in any structure is to start with a clean and DRY surface. This applies to any polymer. In other words, the quality of the surface prep should reflect the quality of your finished structure. The next issue, and equally critical, is to have a dedicated, manufacturer trained applicator team who have the ability to address the wide area of conditions they will encounter when using any polymer product for rehabilitation linings or corrosion coatings.

Q: How Long Must I Wait to Put My Newly Rehabilitated Structure Back Into Active Service?

With Sprayroq™’s quick curing polyurethanes, you can return a structure back to active water service in 30-60 minutes. However, if there is a thicker mass of material sprayed, you may have to wait longer to return to service with a thicker application due to the heat buildup experienced with a thicker application.

Q: What is the Difference Between the Various Sprayroq Products?

All Sprayroq™ products are quick curing polyurethanes, Polyureas or hybrids; with one exception, SR6100 is a trowelable, high strength epoxy used for spot repairs or for coating structures where our SCP’s spray rigs cannot access.

Q: When Polyurethane is Applied to a Wet Area It Will Blister and Foam - Why is This Good?

If our products are applied to a wet surface, they will react violently to contact with water. This “hydrophobic” condition affects different polymers in different ways. The reason that foaming and blistering is a good thing is that the applicator realizes within a second or two that they have not dried the substrate surface properly. If this condition occurs, they can stop, address the moisture issue and re-spray within the 15 minute time window to allow the new spray and existing application to meld together.

Q: How Does SprayWall Address Hydrostatic Loads?

To address hydrostatic load, we use the modified Timoshenko Equation to determine the lining thickness of the SprayWall^® throughout the structure. This is an equation similar to that used by CIPP installers to determine the thickness of the tube they are installing in your wastewater collection and storm system pipes.

Q: Does Sprayroq Provide Confined Space Training?

Although Sprayroq™ requires the prospective SCP to be confined space trained by a qualified trainer, we do not perform that service. We are fortunate to be aligned with companies that can perform that training for our SCP and prospects. The fee for training is absorbed by the applicator.

Q: Are There Extraordinary Safety Precautions Necessary When Working With Polyurethanes?

Yes! Although our products are environmentally friendly, they can be hazardous to people in the immediate area during a spray application. During our Sprayroq™ Boot Camp, we teach applicators what is the proper protective equipment that must be used during a spray application. This equipment includes a full air mask supplied by fresh air, not organic cartridge filters. The applicator must use a Tyvek suit, safe rubberized gloves, and shoe covers.

Q: Are Sprayroq Products Environmentally Friendly?

Yes. All Sprayroq™ products are VOC free (Volatile Organic Compound) without solvents or other harmful components that may damage the environment.

Q: What is a "Green Product"?

Green Products are materials from Renewable Sources defined as products made from raw materials that are capable of being replaced by natural ecological cycles or sound management practices. Renewable sources include, but are not limited to soy, corn, or hemp oils. As applied to the polymer market, when substituting 20% or more of the petroleum based materials, a Green Product has been created.

Q: Does Sprayroq Have "Green Products"?

Yes! See our sections on SprayShield Green I and SprayShield Green II under the products tab!

Q: What is ANSI 61 Certification?

This Standard is intended to cover specific materials or products that come into contact with: drinking water, treatment chemicals, or both. The focus of the Standard is evaluation of contaminants or impurities imparted indirectly to drinking water. The products and materials covered include, but are not limited to, process media (carbon, sand, etc.), protective materials (coatings, linings, liners, etc.), joining and sealing materials (solvent cements, welding materials, gaskets, etc.), pipes and related products (pipes, tanks, fittings, etc.), mechanical devices used in treatment/transmission/distribution systems (valves, chlorinators, separation membranes, etc.), and mechanical plumbing devices (faucets, endpoint control valves, etc.). Point-of-use and point-of-entry drinking water treatment devices are not covered by the scope of this Standard.

Q: Are All of Your Products Certified for Potable Water Contact?

No not all of our products are certified for use in potable water applications. Currently, our core product, SprayWall^®is certified.

Q: Can You Line the Inside of Small Diameter Pipes With Sprayroq Products?

Unfortunately, Sprayroq™ products cannot coat the inside of small diameter pipes that are in service. Due to the density of our product, we have not found a reliable means of delivering the product to the inside of the pipes in the ground. As well, the need to apply the polyurethane on a dry substrate is difficult to attain in an active pipe.

Q: Should We Apply a Corrosion Coating to Our New Wastewater Collection System Structures (I.e. Manholes, Lift Stations, Wet Wells, Etc.)?

Absolutely! Due to urban sprawl and the rebirth of “grayfields”, more and more communities and engineers are taking the extra step of coating new wastewater and water structures to extend the life of the service to the community. As infiltration and the effect of corrosive gases are two primary cause of deterioration in a collection system, the addition of a corrosion barrier to a new structure will ensure a longer life to the system and a better ROI for the taxpayer.

Q: Does SprayWall Seal Off Infiltration?

You must stop any infiltration using appropriate water-stopping material before applying SprayWall^®. Once that has been accomplished, finish preparing the structure for spraying. Once you spray the substrate with Sprayroq™’s SprayWall^® structural product, the polyurethane will bond to the concrete, steel or masonry, sealing off the infiltration.

Q: Can I Coat a Septic Tank or Basement With Sprayroq Products?

Yes, you could, but it probably isn’t practical or cost effective. SprayWall^® and SprayShield Green were formulated to work in a water and wastewater environment. the use of the product for other sealing and corrosion applications may not be the best answer. Check with your local SCP or Sprayroq™ to see if your application may be right for this product line.

Q: Do Sprayroq Products Bond to Only Concrete?

No, Sprayroq™ products have a tenacious bonding ability to not only concrete, but steel, aluminum, masonry materials and other substrates that may be used in our water and wastewater systems. SprayWall^® and SprayShield will not bond to polyethylene.

Q: What Other Applications Can I Use Sprayroq For?

Some of the applications for Sprayroq™ products include coatings or linings of the following structures:
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• Manholes (Water and utility)
• Culverts
• Vaults
• Junction boxes
• Lift stations
• Inlets
• Storm sewers
• Wet wells
• Clarifiers
• Digesters
• Grit chambers
• Retention ponds
• Secondary containment fields
• Water tanks
• Corrugated pipes
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Plus many other applications in the water industry and other industrial infrastructure rehabilitation and corrosion coating applications.

Q: Does Sprayroq Have a Quality Assurance Plan?

Yes, all batches are tested to product specifications such as viscosity and reaction and cure rates. Testing occurs at the production plant and lab which located with our home office in Irondale, Alabama. Any discrepancies would initiate an investigation of that particular batch.

Q: What is the Shelf Life of Your Sprayroq Products?

If the 55 gallon drums remain sealed, the expected shelf life of the products is one year. If the drum has been opened and may not be used for a time, be sure to reseal the drum tightly to protect the product from moisture and top off the void in the drum with nitrogen if possible.

Q: Are Your Products Third Party Tested?

Yes, we have copies of all of our third party test results available on this website – they are available on each product’s detailed information page located under the products tab above!

Q: How Long is the Sprayroq Warranty?

The warranty for the Sprayroq™ product line is three years from the date of application. Sprayroq™ warrants that its material is free of defects at the time of application. Should any product be found to be defective, the product will be replaced by Sprayroq™ or the money will be refunded to the SCP.

Q: Can You Provide Us With a Sample Product Specification?

Yes, in fact, if you visit our website, you will find a sample specification for corrosion coatings and structural rehabilitation under our Resources section of the website.

Q: Do You Have Case Studies of Sprayroq Rehabilitations?

Sprayroq™ has included on this site a number of projects that have been completed and documented by our SCP base. These case studies present an overview of the project, some photos and the contact information of the SCP who completed the project. This is for those who have similar projects to contact the contractor who successfully completed a similar project.

Q: What is a Creep Test?

Dynamic Mechanical Testing is a procedure for predicting the life of the physical properties of a material.

Q: What is a Pull Test?

A procedure for measuring the adhesion to a substrate.

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