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This Material requires a minimum truckload purchase. Please use Product # 459 or contact Epoxy.com for more information.

Epoxy.com PRODUCT #452 is a liquid applied, single component, moisture-cured polyurethane. It is the major component of all Epoxy.com PRODUCT #450 deck coating systems.


Composition: Liquid-applied, single-component, moisture-cured, polyurethane elastomer. All materials shall be delivered to the jobsite in unopened containers clearly marked and labeled.

Basic Uses: The Epoxy.com PRODUCT #452 is the waterproofing membrane used with the Epoxy.com PRODUCT #450 W.D.A., Epoxy.com PRODUCT #450 X-2, Epoxy.com PRODUCT #450 M.R., Epoxy.com PRODUCT #450 P.D.S., Epoxy.com PRODUCT #450 W.S. systems. Epoxy.com PRODUCT #452 is widely used to waterproof concrete and plywood decks which are subsequently covered with outdoor carpeting, tile, or wood decking. The product is recommended for all applications which require the waterproof surface to be painted, where a bitumen-extended polyurethane would not be suitable.

Limitations: Containers that have been opened must be used up within one or two days since it is a moisture-reactive material. It sets up when exposed to air. All surfaces must be completely free of foreign matter, and primed with Epoxy.com PRODUCT #891 PRIMER, where necessary.

Shelf Life: 6 months at 77oF (25oC)

Color: Concrete Grey, Tan

Sizes: Available in 1 gallon cans, 5-gallon pails and 55-gallon drums. Weighs 9.8 lbs. per gallon (4.45 kg/gallon).

Standards: Where Epoxy.com PRODUCT #452 is used as a component of the Epoxy.com PRODUCT #450 systems, Class "A" Fire Rating A.S.T.M. E-108 On concrete decks Complies with A.S.T.M. C-957-87.


Surface Preparation: All surfaces which are to be coated with Epoxy.com PRODUCT #452 must be free of contamination such as curing compounds, concrete hardeners, bond breakers, paint, etc. All surfaces must be dry, having a maximum water content of 20%. We recommend water-curing concrete instead of using concrete curing compounds. Only exterior grade plywood should be used. Concrete should be cleaned by sandblasting or acid etching. Allow a minimum drying time of 72 hours. Except for non-moving shrinkage cracks, all other cracks and joints must be sealed with Epoxy.com PRODUCT #910, a single-component, moisture-cured sealant manufactured by Epoxy.com,  All surfaces, where necessary, must be primed with Epoxy.com PRODUCT #891 PRIMER prior to application of the coating system at a rate of 350 square feet per gallon (8.6 m2/gallon), except for plywood in good condition.

All seams between plywood sheets and those between metal flashing and the plywood deck must be reinforced by imbedding a 2 inch (5 cm) wide strip of glass cloth tape in wet Epoxy.com PRODUCT #452, which is brushed evenly over the seam in a width of about 3 inches (7.6 cm) and a thickness of about 20 mils (0.5 mm) wet. The application of Epoxy.com PRODUCT #452 can subsequently be made immediately over the entire area, including the taped areas. Cracks in concrete must be treated in the same way. Where Epoxy.com PRODUCT #452 is used as a protective coating on polyurethane foam roofs, it must be applied within 8 hours from the time the foam is installed.

Application: Epoxy.com PRODUCT #452 shall be applied at a rate of 60 square feet per gallon (1.5 m2/liter) per coat resulting in a 25 dry mil (0.6 mm) thickness. Most applications require two coats at this coverage, allowing a 24 hour cure time between coats. Epoxy.com PRODUCT #452 can be applied by airless spray equipment, rollers, or squeegees.

Airless spray equipment must have a minimum of 30 to 1 ratio.

Permit a 48 hour cure time after the final coat is applied before continuing with tile setting, carpet laying, back filling, or any other operations.

Property  Measuring Standard and Conditions  Results
Hardness Shore "A"  A.S.T.M. D-2240 55
Ultimate Tensile Strength p.s.i  A.S.T.M. D-412 975  (6.7 N/mm2)
Ultimate Elongation   A.S.T.M. D-412 825%
Adhesive Peel Strength on Primed Concrete   A.S.T.M. D-903 90 P.L.I.
Peel Strength on Plywood   A.S.T.M. D-903 95 P.L.I. cohesive failure
Solids Content  90% by weight
Water Absorption   A.S.T.M. D-471 < 1% by weight
Temperature Service Range  -50degrees F to +200 degrees F(-45 degrees C to 93.3 degrees C)
Viscosity at 77°F (25°C)  Brookfield  150 poises
Moisture Vapor Transmission A.S.T.M. E96-66 Procedure
(a) 15 mil (0.015") dry film (0.38 mm)  3.7 perms ± 0.6
(b) 30 mil (0.30") dry film (0.76 mm)  2.4 perms ± 0.4
Cured 7 days at 77°F(25°C) 50% RH
Abrasion Resistance  A.S.T.M. C-501-62T 30 mil dry film on 4" x 4" (10 cm x 10 cm) metalCS-17 wheel, 1000 rev. with1000 grams weight


No change in weight
Tear Resistance  A.S.T.M. D-1004-66 220 pounds per linear inch
V.O.C. Content  165 gr/lit
Perpendicular Bond-strength on Plywood  185 p.s.i plywood failure


All products proven to be defective in manufacture will be replaced at no charge. Since the use of these products is beyond our control we cannot accept damage in excess of the purchase price of these products.


If Epoxy.com PRODUCT #452 is damaged, it can be repaired by cleaning the surface with M.E.K. and recoating it with Epoxy.com PRODUCT #452.


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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 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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