HYDRATECH POLYSPRAY ECR-AA
HydraTech PolySpray ECR-AA
Physical Properties
Surface Preparation
Primary & Secondary Containment Recommendations
HYDRATECH POLYSPRAY ECR-AA
PolySpray ECR-AA is a spray applied, rapid setting elastomeric polyurea providing outstanding resistance to sustained chemical exposure from concentrated salt, acid and alkali solutions. In many cases the PolySpray ECR-AA provides a flexible alternative to brittle epoxies. PolySpray ECR-AA is ideally suited for the rehabilitation of chemical sewers, sanitary waste pipe, storm drain culverts and secondary containment applications. PolySpray ECR-AA is recommended for structures subject to significant lateral or transverse movement. The unique chemical resistant and elastomeric properties of the PolySpray ECR-AA provide the desired physicals without compromising chemical resistance.
Limitations
Not recommended for:
Sustained immersion in organic solvents
Structural support applications
Health & Safety
Consult product MSDS supplied separately.
Shelf Life & Storage
The product has a shelf life of six months when stored in the original unopened containers and not subject to temperatures below 70ºF and above 130ºF.
Product Codes
9750-00A81 PolySpray ECR-AA ISO Drums
9750-00A91 PolySpray ECR-AA ISO Totes
9750-02B81 PolySpray ECR-AA Resin Lt Gray Drums
9750-02B91 PolySpray ECR-AA Resin Lt Gray Totes
9750-05B81 PolySpray ECR-AA Resin Mid Blue Drums
9750-05B91 PolySpray ECR-AA Resin Mid Blue Totes
(* other colors available to minimum order quantity)
PHYSICAL PROPERTIES
| RESIN Viscosity | 1000-1200 cP @77ºF |
| ISO Viscosity | 400-600 cP @77ºF |
| Gel Time | 8 sec. |
| Tack Free | 20 sec. |
| Back in Service | 30 minutes |
| Shore Hardness | ASTM D2240 D43 |
| Tabor Abrasion Resistance | ASTM D4060 <2mg |
| (CS17, 1000g, mg of loss/1000 cycles) | |
| Tensile Properties (Type IV, min 0.15" thick) | ||
| Tensile Strength (psi) | ASTM D638 | 2,300 |
| Tensile Modulus (psi) | ASTM D638 | 18,200 |
| Elongation (%) | ASTM D638 | 200 |
| Tear Strength (pli) | ASTM D624 | 329 |
| Flexural Properties (3 point, 2.5" span/min 0.15" thick) | ||
| Flexural Strength (psi) | ASTM D790 | 1,200 |
| Flexural Modulus (psi) | ASTM D790 | 16,400 |
| MVT (perm. 30 mil dry) | ASTM D1653 | 0.010 |
| CTE (in/in/ºC) | ASTM D696 | 98x10-6 |
| Adhesion ASTM D4541 | |
| Concrete (psi) | 400 (concrete failure) |
| Steel (psi) | >2,000 |
SURFACE PREPARATION
Concrete
Unless otherwise recommended by HydraTech Engineered Products LLC, cure new concrete a minimum of 28 days before application of PolySpray.
New concrete generally requires a minimum 28 day cure time under favorable environmental conditions to achieve its design strength. PolySpray should not be sprayed over damp or green concrete, as this may reduce adhesion and increase the potential of water vapor and/or gas caused blisters.
Prior to application of coatings, check for the presence of moisture beneath the surface according to the Plastic Sheet Method described in ASTM D4263. Other appropriate alternate test methods may be submitted for consideration. Conduct the test on representative sections of each pour. If moisture is present, consult HydraTech Engineered Products LLC for required action.
Remove surface hardeners, oil, grease, dirt, efflorescence, laitance, or other foreign contaminants before applying coatings. Remove curing membrane (if any), if it is determined that the membrane would interfere with the adhesion or performance of the applied PolySpray products. The concrete surface also needs to be free of standing water.
If portions of the existing coating are sound and intact, determine the compatibility of PolySpray products with the existing coating in accordance with ASTM D5064. If PolySpray products are incompatible with the existing coating, the existing coating must be removed using the methods described below.
The compressed air supply used for blast cleaning shall be completely free of all oil, water and other contaminants and provide the required volume of air at 100psi or greater. Abrasives used shall be clean, a uniform grade and of an appropriate size to obtain the specified surface finish and profile. Do not use contaminated abrasive. Water used with high-pressure water blasting or wet abrasive blasting shall be clean potable water.
A surface texture similar to that of medium-coarse sandpaper should be attained.
Thoroughly clean all blasted surfaces to remove all dust and debris after dry blasting, or to remove all water, sludge and debris after wet blasting. Vacuum cleaning a roughened concrete surface is the only known effective method of removing dust from deep pits, cracks, crevices, bug holes, etc. and is considered a mandatory procedure.
Use coving products or mastics to eliminate 90o internal angles and corner sections. Repair and remove or fill cracks, voids, honeycombs, fins and other surface irregularities using a recommended patching material. Grind all form ties or other metallic protrusions below the surface and then patch or fill.
All expansion joints and moving cracks must be isolated by with a bridging material to eliminate stresses during cure.
A concrete primer shall be used to ensure adhesion of PolySpray products and to prevent pinholes caused by out gassing. HydraTech offers and recommends PolyPrime for most applications. The primer shall be applied as per the manufacture’s instructions.
Steel and other Ferrous Substrates
Prepare in accordance with Steel Structures Painting Council Surface Preparation SSPC-SP6 to SP10 near-white metal blast cleaning to give a 3-4 mil profile to create a surface finish for PolySpray to chemically and mechanically adhere to.
All work blasted should be coated the same day.
Steel surfaces must also be free from rust, salts, dirt and any other contaminants. Any welds shall be free of voids and spurs. Sharp protrusions should be ground smooth. Check for soluble salts in all appropriate locations and take remedial action if any are found.
Be sure to test the surface conditions prior to application of the PolySpray system. Do not apply PolySpray products when the ambient temperature is less than 5ºF above the dew point.
Beware of the potential for cold wall effect and undertake appropriate preventative measures when required.Equipment Recommendations
| Gun | Gusmer GX7-400 (mechanical purge) |
| 453 Module (drilled to 0.025” on both ports) | |
| 212 Tip |
| Pump | Graco H20/35 Pro | |
| Component temperature | 155ºF | |
| Hose temperature | 155ºF | |
| Pressure | 2000psi |
Notes:
Clean equipment with PolyFlush followed by PolyLube. Do not use MEK to clean equipment. Ensure material is mixed and >70˚F prior to spraying. PolySpray ECR-AA has a very short recoat window. Use PolyPrep when recoating is required. Avoid contact with moisture by utilizing desiccant cartridges on both the A and B sides and by spraying in dry conditions onto dry substrates. PolySpray ECR-AA has a very rapid gel time and tack free time similar to other polyureas but requires extended time to fully cure. Physical properties are not achieved until completely cured. Ensure even application thickness and smooth transitions.
PRIMARY & SECONDARY CONTAINMENT RECOMMENDATIONS* BASED UPON CHEMICAL RESISTANCE
(ASTM D543,7d immersion @ 77ºF, unless otherwise stated)
| CHEMICAL | ΔWt% | ΔVol% | 1º | 2º |
| Acetic Acid, 10% | 2.50 | 2.55 | Yes | Yes |
| Acetone | 62.30 | 64.44 | No | No |
| Ammonium Hydroxide, 20% | 2.93 | 0.54 | Yes | Yes |
| Ammonium Nitrate, 20% | 0.74 | 0.68 | Yes | Yes |
| Ammonium Phosphate, 20% | -0.25 | -0.75 | Yes | Yes |
| Antifreeze | -0.30 | 0.50 | Yes | Yes |
| Benzene | 111.30 | 114.75 | No | No |
| Brake Fluid | 22.03 | 18.91 | No | Yes |
| Brine, 13% | -0.26 | 1.55 | Yes | Yes |
| Citric acid, 20% | 0.05 | 0.60 | Yes | Yes |
| Diesel Fuel | 11.68 | 16.50 | No | Yes |
| N,N Simethyl Formamide | 185.01 | 164.79 | No | No |
| Gasoline | 93.99 | 100.23 | No | No |
| Hexane | 18.67 | 22.06 | No | Yes |
| Hydrochloric Acid, 5% | -0.08 | 0.83 | Yes | Yes |
| Hydrochloric Acid, 10% | -0.12 | 0.98 | Yes | Yes |
| Hydrochloric Acid, 25% | -0.22 | 0.49 | Yes | Yes |
| Hydraulic Oil | 1.32 | 2.87 | Yes | Yes |
| Isopropanol | 18.74 | 25.63 | No | Yes |
| Kerosene | 13.93 | 14.10 | No | Yes |
| Lactic Acid, 85% | 15.26 | 10.77 | No | Yes |
| Methyl Ethyl Ketone | 119.40 | 127.60 | No | No |
| Methanol | 36.99 | 37.90 | No | No |
| Mineral Spirits | 14.38 | 16.59 | No | Yes |
| Motor Oil (10W30) | 1.25 | 1.54 | Yes | Yes |
| Nitric Acid, 10% | 2.59 | 1.45 | Yes | Yes |
| Nitric Acid, 30% | 13.49 | 7.99 | No | Yes |
| Nitric Acid, 50% | 53.65 | 68.69 | No | No |
| Phosphoric Acid, 10% | -0.06 | 0.11 | Yes | Yes |
| Phosphoric Acid, 25% | -0.15 | -1.28 | Yes | Yes |
| Phosphoric Acid, 50% | -0.01 | 0.75 | Yes | Yes |
| Phosphoric Acid, 85% | 33.99 | 11.31 | No | Yes |
| Potassium Hydroxide, 10% | -0.17 | 0.29 | Yes | Yes |
| Potassium Hydroxide, 20% | -0.54 | 0.37 | Yes | Yes |
| Potassium Hydroxide, 50% | -1.16 | -0.49 | Yes | Yes |
| Propylene Carbonate | 3.83 | 6.85 | No | Yes |
| Sodium Hydroxide, 5% | -0.09 | -1.22 | Yes | Yes |
| Sodium Hydroxide, 10% | -0.29 | 1.07 | Yes | Yes |
| Sodium Hydroxide, 25% | -0.81 | -1.18 | Yes | Yes |
| Sodium Hydroxide, 50% | -1.46 | -0.56 | Yes | Yes |
| Sodium Hypochlorite | 0.61 | 0.56 | Yes | Yes |
| Sulfuric Acid, 5% | -0.11 | 0.25 | Yes | Yes |
| Sulfuric Acid, 10% | -0.21 | 1.76 | Yes | Yes |
| Sulfuric Acid, 20% | -0.25 | 0.12 | Yes | Yes |
| Sulfuric Acid, 25% | -0.38 | 0.32 | Yes | Yes |
| Sulfuric Acid, 50% | 26.36 | 10.58 | No | Yes |
| Sulfuric Acid, 70% | 67.31 | 34.23 | No | Yes |
| 1,1,1 Trichloroethylene | 146.20 | 107.03 | No | No |
| Toluene | 98.63 | 88.16 | No | No |
| Vinegar | 1.62 | 2.00 | Yes | Yes |
| Water (tap) | -0.14 | -0.52 | Yes | Yes |
| Xylene | 19.49 | 84.29 | No | No |
| *Recommendations are based upon samples cured for 48 hours before unsupported complete immersion in the stated test chemicals at room temperature. It is highly recommended that in the case of complex mixtures and/or elevated temperatures, the performance of any product should be confirmed by field immersion prior to the coating operation. | ||||