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Epoxy Polyurethane Polyester MMA - Methyl Methacrylate, other Resin Systems Over 350 Products Since 1980

MMA Polymer Crack Healer & Sealer

Product OSVX831


OSVX821 Liquid MMA Polymer Crack Repair Resin is for injection repair or as a penetrating sealer on concrete. It is a two component Methyl Methacrylate resin system that polymerizes in place. The extremely low viscosity will penetrate into concrete cracks as fine as 0.003 inches.


  • Extremely low viscosity
  • Potlife can be adjusted to control gel time, for winter or summer application.
  • Has been used with patented vacuum process systems
  • Ideal for use with injection machine, hand held caulking guns, or single tube filling gun
  • Bond strength to concrete exceeds concrete tensile strength
  • Winter Formula can be used on dry surfaces at temperatures as low as 20deg;F


Viscosity 10 c.p.s.
Gel Time 20-30 minutes
Cure Time 80% in 6 hours @ 50°F (10°C)
Adhesion to Concrete 2,000 psi (13.79 Mpa)
Compressive Strength, 7 days 12,000 psi (96.53 Mpa)     
Tensile Strength, 7 days       5,000 psi (34.47 Mpa)
Flex. Strength 12,000 psi (82.74 Mpa )
Linear Shrinkage 1%



Concrete cracks to receive OSVX821 Methyl Methacrylate (MMA)  Polymer Crack Repair Resin must be clean, dry and sound. The drier the concrete, the deeper the penetration into fine cracks. Clean cracks using vacuum or compressed air to remove debris from cracks. Compressors must employ inline traps or filters to prevent water or oil from contaminating crack


One 50 gram bottle of B Component is mixed with 1 gallon A Component. Open Component A and put Component B (initiator) paste into Component A container (one 50 gram bottle of B for each 1 gallon of A, or five 50 gram bottles of B for each five gallon unit of A). Mix for 2-3 minutes with a low speed drill and Epoxy.com -Mixing Paddle. After mixing, a slight amber color liquid polymer will form.


OSVX821 Liquid MMA Polymer Crack Repair Resin is applied to horizontal surfaces by squeegee, roller or brush. Spread material over area and allow to pond over cracks. Permit material to penetrate into cracks and substrate; remove excess material leaving no visible surface film. For cracks greater than 1/8" (3.2 mm) wide, fill crack with oven-dried fine sand before applying PRODUCT #685. Seal cracks with Epoxy.com Product #703 Trowel Grade Epoxy from underside, when accessible, to prevent leakage. Recoating may be required on very porous surfaces.  After treatment, wait at least (20) minutes at 72 °F (22.2° C), before opening to traffic.


Do not leave puddles which can cause slippery surface. To prevent slippery surfaces, broadcast dry silica sand or Epoxy.com Product #75 Filler. Do not apply to a damp or wet surface. Do not use below 50F for normal cure or 20F for winter cure. Store below 80 F to prevent polymerization of the liquid and loss of activity of initiator.


Coverage depends on porosity of concrete, masonry or timber surface. 150 to 200 (1.03 - 1.38 MPa) square feet are the usual range normal.


1 gallon (3.8 L) , 5 gallon (18.9 L) units or 54 gallon (204.4 L) drums.


DANGER! FLAMMABLE! A Component contains Methyl Methacrylate. B Component contains Benzoyl Peroxide.

Use only with good ventilation. Avoid inhalation of vapor. Prevent all contact with eyes, skin and clothing. Wash thoroughly after handling. keep containers closed when not in use.

FIRST AID IN CASE OF CONTACT: If contact with skin occurs, wash immediately with soap and water, and contact a physician. if contact with eyes, immediately flush with plenty of water for at least 15 minutes. Remove contaminated clothing and shoes. Call a physician. Wash clothing before reuse and discard contaminated shoes.




Proper mixing and installation is critical to the optimal success of all product. See Installation Tips, Techdata, & MSDS for more details on our products. Be sure to contact us with any questions and/or concerns that you have.


For more information on Epoxy.com Products please contact:

A Division of Epoxy Systems, Inc
20774 W. Pennsylvania Ave.
Dunnellon, Florida 34431
Over 300 products,
Since 1980
Florida & Vermont

Office Hours: 9AM-4PM Eastern Time (6AM-1PM Pacific Time).
Closed 12Noon-1PM Eastern Time for Lunch.

321-206-1833 Customer Service - Ordering and Order Status
Katey Fontaine, VP - Customer Service Director

352-533-2167 Technical Support
Norm Lambert, President - Technical Support Director

352-489-1666 Accounting and Administration
Debby Lambert, CEO, and CFO

352-489-1625 Fax line to all Departments

Website: www.epoxy.com

24 hour Hazmat Emergency Telephone Response Service -1-800-633-8253

We accept MasterCard, Visa, American Express, Discover, Wire Transfers, and Cashiers Checks We accept MasterCard, Visa, American Express, Discover, or Wire Transfers.

Copyright 1994-2014 (providing online information about the right product for the right job for 20 years) EPOXY.COM a division of Epoxy Systems, Inc.- Florida and Vermont. All rights reserved.

Unless other wise agreed upon in writing, buyer is responsible for the cost of shipping.

This information is presented in good faith to assist in determining whether this product is suitable for application. No warranty or representation, however, is intended or made, nor is protection from any law or patent to be inferred, and all patent rights reserved.

Epoxy.com a division of Epoxy Systems, Inc. (hereinafter known as "Supplier" warrants its products (when properly stored) for the period of time as follows: Epoxy one (1) year; Polyesters, Methyl Methacrylate and Polyurethanes Six (6) months. Supplier warrants that its products will be free of manufacturing defects and will be in conformity with published specifications when handled, stored, mixed and applied in accordance with recommendations of Supplier. If any product fails to meet this warranty, the liability of Supplier will be limited to replacement of any non-conforming material if notice of such non-conformity is given to Supplier within the warranty period for the material (as indicated above), or within 1 year of the delivery of materials (whichever is sooner). Supplier may in its discretion refund the price received by Supplier in lieu of replacing the material. No customer, distributor, or representative of Supplier is authorized to change or modify the published specifications of this warranty in any way. No one is authorized to make oral warranties on behalf of Supplier. In order to obtain replacement or refund the customer must provide written notice containing full details of the non-conformity. Supplier reserves the right to inspect the non-conforming material prior to replacement. EXCEPT FOR THE EXPRESSED WARRANTY STATED ABOVE, THERE ARE NO OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING WITHOUT LIMITATION, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR PURPOSE. SUPPLIER'S OBLIGATION SHALL NOT EXTEND BEYOND THE OBLIGATIONS EXPRESSLY UNDERTAKEN ABOVE AND SUPPLIER SHALL HAVE NO LIABILITY OR RESPONSIBILITY TO THE PURCHASER OR ANY THIRD PARTY FOR ANY LOSS, COST, EXPENSE, DAMAGE OR LIABILITY, WHETHER DIRECT OR INDIRECT, OR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES. All quotes and sales subject to availability.

Many of our products are made on an individual order basis. Unless authorized in writing by us in writing before the material is made, there are no returns on items purchased from us, once the order has been processed, and the material made. In the event of authorized returns a restocking charge will be charged in the amount of 30% of the value of the material returned or $150 whichever is greater. No returns on non-list priced items. All Returns are for merchandise (store) credit only, no cash or credit card credits. In the event of a return, buyer is responsible for the cost of shipping and handling in both directions.

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