DISCONTINUED in April 2023: SEE Concrete Mender Low Odor.
Due to issues with vital component availability, this product is no longer manufactured. See our new Concrete Mender Low odor.
Roadware Concrete Mender VO™ is a custom designed polyurethane concrete repair product for repairing cracks, spalls, and joints in interior areas where the temporary odor of our regular Concrete Mender ™ could be an issue.
Installers use Concrete Mender VO™ to repair cracks in a refrigerated warehouse that requires no cutting, dust, or odors at 35 degrees F.
Roadware Concrete Mender VO™ is a high-penetration two-part hybrid urethane that combines with sand to form a tough instant polymer concrete. This high penetration formula is
designed for penetrating deep into the host concrete creating extremely high bond strengths, reinforcement of the repair area as well as permanent repairs. Roadware Concrete Mender VO™ produces polymer concrete repairs that absorb the shock
and transfers the load of heavy traffic without cracking or dis-bonding. It is highly chemically resistant and can be applied in a wide range of temperatures. It is excellent for industrial floor repairs subject to forklift traffic and harsh conditions.
Uses:
- Repairing hairline cracks or larger, where future movement is not anticipated.
- Restoring integrity to distressed concrete.
- Connecting broken slabs.
- Repairing moving slabs.
- Repairing spalls and pop-outs in concrete.
- Securing bolts, equipment, or railings into concrete.
- Vertical repairs when combined with specified sand.
- Repairing concrete surface imperfections prior to coating.
- Repairing cracks and spalls prior to coating.
- Repairing polished concrete.
- Polishing pit grout.
Features:
- Very low viscosity allows deep penetration into concrete.
- Can be cartridge applied or bucket mixed.
- When combined with manufactured sand, Concrete Mender VO™ will form a tough 4500 psi polymer concrete with similar properties to existing concrete that will stay pliable over time.
- Safe to use. Materials react quickly with almost no odor.
- Self-leveling or may be combined with sand and worked with a trowel. Stays workable longer than similar materials.
Completely cures in 20 minutes after application at 70° F. Will also cure rapidly in subzero environments.
Benefits:
- Long lasting repairs that accommodate harsh physical environments.
- Easy preparation, a wire brush is all that is needed in some cases.
- No downtime, repairs are fully ready for traffic in approximately 20 minutes from application.
- Almost no noticeable odor, can be used in a wide range of indoor areas.
Limitations:
Roadware Concrete Mender VO is designed for use on interior or exterior concrete surfaces. It is not intended for repairing areas of movement such as exterior cracks and joints subject to regular freeze /thaw cycling. It must be applied to concrete free of surface moisture, dirt or contaminates.
Tips:
- 1. Concrete Mender VO is best when used at temperatures above 0.0 degrees C. Repairs can be made as low as -6 C.
- 2. At 22 C, the Concrete Mender VO will take 24 hours to reach full strength. It will take longer at cooler temperatures.
- 3. The extended pot life of Concrete Mender VO in beneficial for bucket/bulk mixing and increased workability.
- 4. Concrete Mender VO is off-white or natural in color. It will take on the color of the sand added to it. Powdered pigments can be added at time of mixing.
- 5. Concrete surfaces must be free of water, frost, ice, or condensation. Any added sand must be dry.
Packaging:
Roadware Concrete Mender VO™
- 21 fl oz. dual cartridge units (600 ml) with mixer (61300)
- 2 gallon units in two parts (61020)
- 10 gallon units in two parts (61050)
Properties: Concrete Mender VO
| Color | Natural Off-white. User added sand and pigment determines final color. |
| Compressive Strength, ASTM D695 | 4109 ± 65 psi depending on sand load. |
| Tensile Strength, ASTM D638 | 4260 ± 245 |
| Elongation ASTM D638 | 4.2 ± 1.0 |
| Hardness | 70D |
| Viscosity | Approximately 30cps |
| V.O.C. (Mixed) | Zero |
| Cure Time | Approximately 20 minutes at 72 F (22 C). |
| Packaging | 600ml Twin Cartridge #61300 Two-gallon Kit #61020 Ten Gallon Kit #61050 |
Yield: Concrete Mender VO
| SIDE A (OZ) | SIDE B (OZ) | SAND (VOL OZ) | MIXED (VOL OZ) | CUBIC INCHES |
| 4 | 4 | 16 | 17.5 | 32 |
| 8 | 8 | 32 | 32 | 64 |
| 16 | 16 | 64 | 70 | 128 |
| 1/2 GAL | 1/2 GAL | 2 GAL | 2.2 GAL | 508 |
| 1 GAL | 1 GAL | 4 GAL | 4.4 GAL | 1016 |
Installation:
Application Temperature: Recommended application temperature is between 20° F and 100° F (-6° to 38°C). It is best to keep material at room temperature (60° to 80° F) prior to application. Contact Roadware technical services for applications below 20 degrees F. If manufactured sand is to be used with product, it also should be kept at room temperature. Avoid frost laden surfaces as this may adversely affect bonding and curing. Concrete Mender VO™ will fully cure in 20 minutes at 72° F (22° C). Cure time is affected by the temperature of the material and the temperature of the concrete surfaces. Warmer temperatures will decrease cure time and colder temperatures will increase cure time. In extremely cold environments, surface heat the concrete to remove frost before application.
Preparation:
Surface Cracks (all depths and widths): Cracks should be free of dirt, oils, dust, latents and old crack repair materials. ALL SURFACES MUST BE CLEAN AND DRY. New concrete must be fully cured. A wire brush, twisted wire wheel, or diamond blade attached to an electric hand grinder is recommended for preparing cracks and creating a clean surface for bonding. Use care when cutting or grinding concrete. See https://www.silica-safe.org/.
Surface Spalls and Deflections: Remove all loose materials back to sound concrete with a chisel or light chipper. Square cutting is not necessary. If a square appearance is desired, lightly score surface and remove material. Use a wire brush, twisted wire wheel, or mechanical method to clean the repair area. All surfaces must be free of dirt, oils, dust, latents and old repair materials. New concrete must be fully cured. Use care when cutting or grinding concrete. See https://www.silica-safe.org/.
Mixing:
Cartridges: Concrete Mender VO™ is a two component material and must be thoroughly mixed at a ratio of 1 part “A” to 1 part “B” by volume. Mixing and metering of Concrete Mender VO™ is achieved with self-mixing cartridges provided by Roadware, Inc. Material is ejected from prepackaged cartridges through a supplied static mixing nozzle with a dual component caulking gun such as the Roadware 5300 Application Tool, Mixed material is applied directly into the repair area immediately after mixing.
Bulk: Due to the rapid setting nature of the product, pot-mixing of the components is not recommended for crack and joint repairs less than 1/2″ in width. Concrete Mender VO™ supplied in two-gallon or 10 gallon kits may be bucket mixed in quart batches and applied immediately to the repair area. Combined one pint of Part A with one pint of Part B. Mix with a drill mixer or hand mixing stick for 30 seconds or until well blended. Add 2 quarts of manufactured sand and mix for an additional 10 seconds. Pour the entire batch into the repair area immediately. SEE BULK MIXING INSTRUCTIONS INCLUDED WITH MATERIAL. Concrete Mender VO™ may be dispensed through a one-to-one ratio pump specifically designed to handle extremely low viscosity materials while maintaining exact ratios. The system must not allow the two components to combine until they reach the point of delivery. Contact Roadware for information on acceptable pumping equipment. All pumping equipment must be approved by Roadware, Inc. prior to application.
Application Methods:
Surface Cracks (all depths and widths): Assemble cartridge according to directions. Make sure to install the included flow-restrictor before attaching the static mixer. Holding the 5300 application gun upward, place cartridge set into gun. Gently squeeze trigger to bleed-off air and start material flowing into mixers. Point mixer into waste container and squeeze trigger to start mixing process. DO NOT POINT MIXER UPWARD AFTER MATERIAL IS FLOWING. This may cause material to flow back into the tubes and cause clogging.
Pre-wet repair area with material. Fill with up to 1/2″ 30-40 grit manufactured silica sand and additional material. Work in multible lifts if needed. Be sure to saturate all of the sand completely. Additional sand may be added to the repair as necessary. Saturated sand may be moved into place with a small squeegee or scraper. Work with one small section at a time. Do not stop flowing material for a period of more than 3 minutes. If material sets inside mixer, remove cartridge from gun and replace mixer.
Fill all repair areas to grade. When material cures in about 15 minutes, remove excess material with a sharp scraper for a smooth and flat finish.
Spalls: Pre-wet repair area with mixed Concrete Mender VO™ without sand. Fill with 1/2 inch layers of 30-40 grit manufactured silica sand and additional material to grade. Be sure to saturate all of the sand completely. Additional sand may be added to the repair as necessary. Saturated sand may be moved into place with a small squeegee or scraper. Work with one small section at a time. Do not stop flowing material for a period of more than 2 minutes. If material sets inside mixer, remove cartridge from gun and replace mixer. A trowel or scraper may be used to move saturated sand into place and to create a level surface. If required, surface friction may be maintained by adding additional manufactured to the surface as the material cures. Allow to cure (approximately 10 minutes). Finished repairs may be “cleaned up” by sanding or buffing within a few hours of application.
Vertical Crack Injection: See Roadware Easy-injection instructions.
Color:
Concrete Mender VO™ is composed of an amber colored liquid and a clear colored liquid. The material is amber when dispensed and cures to an off-white finish. Alternate colors can be achieved by selecting different colors of manufactured sand. Concrete Mender VO™ will lighten in color when exposed to ultraviolet rays. This natural occurrence within urethanes will NOT effect the physical properties of the material or the repair.
Clean Up:
Clean all tools and equipment immediately after use with acetone, xylene, MEK, or toluene. Cured material may be removed by soaking or abrading. Concrete Mender VO™ is very aggressive, gloves should be worn to keep material from contacting skin. Use an industrial paint and stain hand cleaner to remove from skin.
Curing:
10 Minute Concrete Mender will cure in approximately 15 minutes from application at 72° F for most traffic situations. The material will reach its full strength in 24 hours. Cure rates in extremely cold environments should be tested beforehand.
CAUTION:
Roadware 10 Minute Concrete Mender Part A contains diphenylmethane-diisocyanate (MDI) CASS# 101-68-8
Risks:
Inhalation of mists and vapors may cause dry throat, cough, dizziness, headache, nausea, unconsciousness and other central nervous systems effects. MDI can induce respiratory sensation with asthma-like symptoms. Repeated and prolonged contact with skin can cause irritation.
Emergency And First Aid Procedures:
Eye contact – flush eye with water for at least 15 minutes. Get medical attention promptly. Inhalation – remove person to fresh air, if breathing is difficult administer oxygen. Get medical attention immediately. Skin contact – wipe off and wash thoroughly contacted area with soap and water. Ingestion – do not induce vomiting. Consult physician immediately.
Precautions:
Provide adequate ventilation to keep the airborne concentration of diisocyanate below TLV limit. For concentration above TLV limit, use of a positive pressure self- contained breathing apparatus (SCBA) or NIOSH/MSHA approved positive pressure supplied air respirator with a full face piece and escape (SCBA) required. Use protective equipment to minimize skin contact. Wear chemical safety goggles, and laboratory coats or aprons to avoid skin contact. Provide access to safety shower and eye wash stations.
SEE SDS SHEETS FOR FURTHER INFORMATION.
CAUTION:
Roadware 10 Minute Concrete Mender Part B contains petroleum hydrocarbon CASS# 64742-94-5
Risks:
Inhalation of mists and vapors may cause dry throat, cough, dizziness, headache, nausea, unconsciousness and other central nervous systems effects. Repeated and prolonged contact with skin can cause irritation.
Emergency And First Aid Procedures:
Eye contact – flush eye with water for at least 15 minutes. Get medical attention promptly. Inhalation – remove person to fresh air, if breathing is difficult administer oxygen. Get medical attention immediately. Skin contact – wipe off and wash thoroughly contacted area with soap and water. Ingestion – do not induce vomiting. Consult physician immediately.
Precautions:
Provide adequate ventilation to keep the airborne concentration of diisocyanate below TLV limit. For concentration above TLV limit, use of a positive pressure self- contained breathing apparatus (SCBA) or NIOSH/MSHA approved positive pressure supplied air respirator with a full face piece and escape (SCBA) required. Use protective equipment to minimize skin contact. Wear chemical safety goggles, and laboratory coats or aprons to avoid skin contact. Provide access to safety shower and eye wash stations.
SEE SDS SHEETS FOR FURTHER INFORMATION
LIMITED WARRANTY
Please see Roadware representative for details.
FOR PROFESSIONAL USE ONLY
NOT FOR SALE OR USE BY THE GENERAL PUBLIC
© 2020 ROADWARE INC All rights reserved.
Roadware Incorporated
1-800-522-7623
651-457-6122
FAX 651-457-1420
381 Bridgepoint Way
South Saint Paul, MN 55075
