Epoxy.com Product #307 Extreamly low viscosity epoxy resin system

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

Epoxy.com Product #307

100% Solids Ultra Low Viscosity Epoxy Resin System


Epoxy.com Product #307 Ultra-Low Viscosity Epoxy Resin System is a two component, 100% solids, moisture insensitive epoxy resin system, mixed at a 2 to 1 ratio, with a very low viscosity for penetrating cracks. Epoxy.com Product #307 Ultra-Low Viscosity Epoxy Resin Systems exceeds the requirements of ASTM C 881 87, Types I, II, Grade 1, Class "B" and "C".


  • High strengths
  • Low viscosity permits easy flow crack allowing grouting by gravity feed or pressure injection.
  • May be injected below water.
  • May be used in temperatures as low as 40°
  • Deep Penetration into Hairline Cracks


ColorComponent A - Light Straw
Component B - Clear
Mixed - Clear (transparent)
Viscosity100cps@ 77° F (25° C)
Pot Life (neat)15 min. @ 75°F (24°C)
Tack-Free (thin film)5 hrs. @ 75°F (24°C)
Full Cure7 days @ 75°F (24°C)
Linear Coefficient of Shrinkage on Cure
ASTM D 2566
Slant Shear2 Day - 1,000 psi (6.8 MPa)
14 Day - 1,500 psi (10.3MPa)
Compressive Strength
ASTM D 695 7 day
7,000 psi (55 MPa)@ 75°F (24°C)
Tensile Strength
ASTM D 638
6,000 psi (41.3 MPa)
Tensile Elongation
ASTM D 638
Compressive Strength, Mortar
ASTM C 109
with 4 parts Epoxy.com Product #76)
7 Days 8,000 psi(55.16MPa)
Shelf Life2 years


  • Use neat for grouting damp and dry cracks or as a penetrating sealer on concrete.
  • Epoxy Injection of hairline and small cracks
  • Mix with 3 parts Epoxy.com Product #76 Epoxy Extender to grout base plates, set anchor bolts
  • Mix with 4 parts Epoxy.com Product #76 Epoxy Extender  for a self-leveling grout.
  • Mix with up to 5 parts of Epoxy.com Product #76 Epoxy Extender for a patching mortar.


Remove dust, laitance, grease and curing compounds from concrete surface by sandblasting, grinding or wire brushing as required - see Epoxy.com Surface Preparation Guidelines for more details. Cracks may be dry, damp, or wet.


Material should range between 65°F (18°C) and 75°F (24°C) to facilitate ease of mixing. Stir each component lightly prior to proportioning. Mix 2 parts Component A with 1 part Component B. Mix thoroughly for 2-3 minutes with Epoxy.com -Mixing Paddle and low speed drill 3 minutes and until color is uniform. When mixed with Epoxy.com Product #76, color of mixed material is gray in color. For Epoxy Injection of Concrete and Wood



Epoxy.com AUTOMATIC PRESSURE INJECTION MACHINE - Contact Epoxy.com Technical Support Department for more details


Place injection ports every 6" to 10" along length of crack. Seal surface of crack to be grouted with Epoxy.com Product #6 Epoxy Gel Adhesive. Pump Epoxy.com Product #307 into lowest port. When epoxy reaches next highest valve, move up and repeat procedure. Remove port after cure if desired. See Epoxy Injection for more details.


Apply mixed material with rubber squeegee or roller. Allow time to penetrate. Squeegee off excess while still liquid.


Apply neat Epoxy.com Product #307 to prime the clean sound substrate. Mix blended epoxy with Epoxy.com Product #76 epoxy filler or Epoxy.com Product #75 epoxy filler and trowel in place.


Diameter of hole should be minimum of 1/2" larger than that of bolt.


One gallon of mixed Epoxy.com Product #307 will yield approximately:
  • 750 cu. in. when mixed with 3 gallons of Epoxy.com Product #76 - very pourable
  • 925 cu. in. when mixed with 4 gal Epoxy.com Product #76 - self-leveling
  • 1100 cu. in. when mixed with 5 gal Epoxy.com Product #76 - masonry mortar


  • Do not thin Epoxy.com Product #307 solvents will prevent proper cure.
  • Do not use for bonding new to plastic concrete, use Epoxy.com Product #7 for that.
  • Substrate temperature and ambient temperature must not be below 40°F(4°C).
  • Exposure to elevated temperatures for prolonged periods is not recommended.
  • Epoxy resin (A Component) may crystallize. Heating material to 120°F and stirring will reconstitute material to original condition. Allow to cool before using.
  • May be too low a viscosity for larger cracks.


WARNING! “A” Component contains epoxy resin May cause skin sensitization or other allergic responses. Use with good ventilation, particularly if material is heated or sprayed. Wear protective clothing, goggles, gloves and/or barrier creams. Keep container closed when not in use. Wash thoroughly after handling.

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 or 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, flush eyes with copious amounts of water for at least fifteen (15) minutes. Remove contaminated clothing shoes. If irritation persists, seek medical attention. Wash clothing before reuse.


Additional Information on Epoxy.com Epoxy Crack Injection Systems:

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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 please contact:

A Division of Epoxy Systems, Inc
20774 W. Pennsylvania Ave.
Dunnellon, Florida 34431
Over 350 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

714-657-3826  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

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

We accept Mastercard, Visa and American express

Copyright © 1994-2009 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.  warrants its products (when properly stored) for the period of time as follows: Epoxies, Product #315, Product #315BC, and Product #316 one (1) year; Polyesters, Methyl Methacrylates (normal) two (2) months and Polyurethanes Four (4) months;  Power Tools and Equipment 90 days; Vinyl Esters, High Molecular Weight  Methacrylates (HMMA) and all other resins (not specifically mentioned above) 30 days; hand tools (non-power tools) 30 days.   Epoxy.com 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 Epoxy.com. If any product fails to meet this warranty, the liability of Epoxy.com will be limited to replacement of any non-conforming material if notice of such non-conformity is given to Epoxy.com within the warranty period for the material (as indicated above), or within 1 year of the delivery of materials (whichever is sooner). Epoxy.com may in its discretion refund the price received by Epoxy.com in lieu of replacing the material. No customer, distributor, or representative of Epoxy.com 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 Epoxy.com. In order to obtain replacement or refund the customer must provide written notice containing full details of the non-conformity. Epoxy.com 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. Epoxy.com 'S OBLIGATION SHALL NOT EXTEND BEYOND THE OBLIGATIONS EXPRESSLY UNDERTAKEN ABOVE AND Epoxy.com  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 Epoxy.com a division of Epoxy Systems, Inc. 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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