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  Epoxy.com Logo - Epoxy, Polyurethane, Polysulfide, Polyester, MMA - Methyl Methacrylate and other Construction Resin Systems - Over 350 Products- Since 1980Contact Us  


Epoxy.com Product #631

100% Solids Chemical Resistant Coating


Epoxy.com PRODUCT #631 Chemical Resistant Coating is a two component high performance epoxy resin formulated with a convenient 1 to 1 mix ratio. Epoxy.com PRODUCT #631 Chemical Resistant Coating has been developed as a coating for exposure to organic acids and other severe chemical environments.

It is used widely in the food and chemical industries for protection of concrete, wood, and steel. Epoxy.com PRODUCT #631 is suitable for application by brush, roller or spray. Where in-shop production techniques may be utilized and elevated temperature curing is feasible, rapid property development may be achieved by curing at 200 - 250F (93 - 121C). This will provide a cured film which may be handled within a relatively short period of time (about 4 hours). Elevated temperature curing will also enhance ultimate physical and chemical resistant properties.


  • Floor coatings
  • Chemical resistant laminating resin
  • Laboratory table top coating
  • Industrial flooring compound
  • Tank linings
  • Sodium hypochlorite tank coating
  • Jet engine test cells


Ultimate tensile strength - ASTM D638 9,500 psi
Tensile elongation - ASTM D638 3%
Ultimate flexural strength -ASTM D790 16,000 psi
Ultimate compressive strength -ASTM D695 14,500 psi
Compressive yield strength - ASTM D695 12,500 psi
Izod impact - ASTM D256 .041 ft. lbs.
Hardness (Shore D) - ASTM D1706 85
Linear Shrinkage 0.0033 inches/inch


All surfaces to receive Epoxy.com PRODUCT #631 must be clean, dry, sound and free from any materials which might interfere with adhesion. Sanding, sandblasting, acid etching, or scarification is recommended depending on the surface to be covered.


Combine one part by volume of base with one part by volume of hardener. Mix thoroughly for three minutes until uniform color blend with no streaks. Apply immediately. A 1/2" drill equipped with properly sized paint paddle is required for mixing.


The following represents percent flexural strength retained after two week's cure at 77F (25C) followed by 30 days immersion in the chemical environment as described.

  @ 77F @ 140F
45% Nitric Acid 100% 100%
25% Acetic Acid 100% 100%
35% Hydrochloric Acid 100% 100%
20% Sulfuric Acid 100% 100%
Skydrol 100%  
15% sodium Hypochlorite 100% 97%
50% Potassium Hydroxide 100% 100%
30% Sodium Hydroxide 100% 100%
50% Sodium Hydroxide 99% 97%

A 98% solution of acid is not as harmful to Epoxy.com PRODUCT #631 as 15% to 50% of hydrolyzed substances. Since hydrolyzed substances vary, for best results, tests should be performed before Epoxy.com PRODUCT #631 is used to assure good performance.

In addition, Epoxy.com PRODUCT #648 is resistant to all alcohols and solvents such as acetone, toluol and methyl cellosolve.


Pot life of a one-quart mass of Epoxy.com PRODUCT #631 is approximately 30 to 40 minutes. Pot life may be extended by spreading out material.


Mix and apply coating by brush or roller at the rate of approximately 125-150 sq. ft. per gallon. (If desired, coating may also be thinned with Epoxy.com PRODUCT #631 Solvent/Thinner and sprayed maximum 5% by volume.) A minimum of two coats is recommended. Second coat may be applied after first coat has become tack free, usually 5-6 hours.


After application, allow 16-24 hours cure at 75F (24C) for traffic bearing purposes only. Allow at least 3-5 days cure at 75F (24C) for development of chemical resistant properties.

Note: This material will cure well at temperatures as low as 35F (3C). However, additional curing time must be provided.


2 years


Clean hands with soap and water or waterless hand cream. Apply under conditions of good ventilation. Avoid contact of Epoxy.com PRODUCT #631 with skin. Clean equipment with Solvent/cleaner.


"A" Component contains epoxy resin. DANGER! "B" Component contains alkaline amines; strong sensitizer. May cause skin sensitization or other allergic responses. Use with good ventilation, particularly if material is heated or sprayed. Prevent all contact with skin and eyes. Wear protective clothing, goggles, gloves, and/or barrier creams. Keep container closed when not in use. Wash thoroughly after handling.


In case of skin contact, immediately wash with soap and water. In case of eye contact, immediately flush eyes with copious amounts of water for at least 15 minutes. Remove contaminated clothing and shoes. If irritation persists seek medical attention. Wash clothing before reuse.




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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