4 Urethane Injection

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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 #4

Hydrophilic Sealing & Grouting Compound


Epoxy.com Product #4 Hydrophilic Sealing and Grouting Compound is a one-component, "Acetone Free", MDI based hydrophilic sealing and grouting compound used to stop water leaks in wet environments. Epoxy.com Product #4 Hydrophilic Sealing and Grouting Compound, as it mixes with existing water, cures rapidly into a tough, flexible, closed-cell compound which is insoluble to water and most other chemicals.


  • Simple to use, one component material. (See note above).
  • Cures to a flexible, permanent seal with excellent bond to most construction materials.
  • Is not a flammable or combustible liquid.
  • Is applied in a moist and wet environment.
  • Can be machine-pumped or hand-applied by caulking cartridge.


Uncured Material

Color Amber
Viscosity (ASTM D 1638)
Reaction time <25 seconds
450 cps ± 100
Density 9.4 Lb. gal
Flash Point (ASTM D 93) >220°F
Expands on Reaction 7 times original volume

Cured Material

Tensile Strength (ASTM D 1564)   84 ±10 psi min.
Elongation (ASTM D 1564) 500% min.
Shrinkage - Linear <15 ± 3%
Corrosiveness Non-Corrosive
Toxicity Non Toxic when cured
Shelf Life 12 months
Cure TimeVaries, dependent upon accelerator added, ambient temperature, and temperatures of grouting compound.

Reaction and Set Times




Without accelerator @ 70°F 4 to 5 min. 6 to 8 minutes   
With accelerator @ 70°F 30 seconds     1 minute


Epoxy.com Product #4 Hydrophilic Sealing and Grouting Compound is used in many ways to stop water leaks.

  • To pressure inject in cracks or hairline cracks, the same way as low viscosity epoxy resins are used. Cracks should be wet, not dry. If cracks are dry, moisten with water.
  • In expansion joints that are sealed with polysulphide, polyurethane, silicone, or any other sealant, the Product #4 is injected behind the sealant to produce a waterproof elastic joint.
  • In concrete or steel liners, such as in tunnels or foundations, holes are drilled, one way valves or packers installed, and Product #4 is pumped in. Once in contact with water, a chemical reaction takes place, and it sets within 3 to 5 minutes.
  • In sewer line joints or any large size joints, to produce the most economical cost per linear foot, saturate any absorbent material such as rope, jute, or oakum, with Product #4. Remove excess Product #4 and force into joint. Spray with water to activate. Repeat procedure until joint is filled.


Product #4 is available in 1 gallon, 5 gallon pails and 55 gallon drums.


Contains MDI. Avoid breathing vapors. Keep container closed. Use only in well ventilated areas. Wear rubber gloves, safety glasses and protective clothing. Use NIOSH approved respirator in confined area. See MSDS for further safety precautions. First Aid; In case of contact with skin or eyes, wash with large amounts of water. If allergic reaction occurs discontinue exposure. Consult a physician.



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 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

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

MasterCard, Visa, and American Express logo

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.


[Home] [Catalog of Products] [Where to Start] [[Bonding Systems] [Chip Floors] [Chemical Resistance]
[Coatings] [Conductive] [Applications] [Elastomeric Systems] [High Temperature]
[Industrial Floors] [Injection] [Joint Systems & Sealants] [Mortars / Grouts] [Novolac] [Polymer Systems]
[Primers and Sealers] [Misc.] [Seamless Flooring] [Waterproofing] [Dealers Wanted] [Installation Tips]
[Product Guide] [Wood Filler] [Who We Are] [Guide Specs]
[Tech Data Sheets in Acrobat Format ] [MSDS in Acrobat Format] [Online Ordering Authorization Form]

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