Epoxy.com Product #965 Gun Grade Polysulfide Joint Sealer 2-Component

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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 965

2 Component Chemical Resistant Polysulfide Joint Sealant


Epoxy.com Product #965 Polymeric Joint Sealant is a two-component chemically cured polysulfide Picture of Joint Materialsealant that provides excellent resistance to bioactivity and the harsh conditions encountered in wastewater treatment plants. Epoxy.com Product #965 Polymeric Joint Sealant cures to a flexible rubber that provides a watertight seal between concrete, masonry, metals, glass, wood, and other construction materials. Epoxy.com Product #965 is has a non-sag consistency. For a pourable consistency use Product #964.


Epoxy.com Product #965 bonds tightly to most clean, dry surfaces. Epoxy.com Product #965 provides +/- 25% joint movement in temperatures as low as -10°F. Epoxy.com Product #965 displays excellent resistance to heat, ozone, oxidation, sunlight and weathering. Epoxy.com Product #965 is specially formulated to give resistance to bioactivity and chemical attack.


Epoxy.com Product #965 has excellent electrical resistance properties. Typical physical properties of cured material at 77°F (25°C) and 50% relative humidity are as follows:

Tensile Strength

ASTM D-638

170 psi

1.17 MPa

Tensile Elongation

ASTM D-638


Shore Hardness A Scale

ASTM D-2240


Service Range

-40°F (-40°C) to 250°F (121.1°C)



Pot life after mixing at 70°F (21.1°C) approximately 40 minutes
Initial cure 24 hours
Final cure 7 days


Epoxy.com Product #965 meet the following specifications:

  • National Bureau of Standards and GSA TT-S-0227E (1970)
  • American Society for Testing & Materials (ASTM) C-920
  • Jet Fuel Resistance Meets Federal Specification SS-S-200E.


Mix entire contents of "B" Component into "A" with a slow speed mechanical mixer for 3 minutes. Mix well until color is uniform. Apply immediately after mixing.


Inspect joint slots to assure that they are clean and dry. To maximize bond to concrete, masonry, and steel, apply Epoxy.com Product #965 Joint Primer and allow to dry. Primer must be used in constant immersion joints. Apply Product #965 with either a caulking gun, by trowel, by concrete grout bag, or a follower plate pressurized system.

PRIMER: If a primer is required us Epoxy.com Product #950 Joint Sealant Primer.  Product #950 Joint Sealant Primer is a one component moisture curing primer formulated to improve adhesion of our Epoxy.com Joint Sealants. Epoxy.com Product #950 Joint Sealant Primer is easy to use and provides extra protection in applications where standing water or submersion will be present. Epoxy.com Product #950 Joint Sealant Primer acts to increase bond between organic and inorganic interfaces, binding together weak areas and creating a tough surface.


Each 1.5 gallon (5.68 L) of mixed material will fill 346 cubic inches (5.7L) of joint slot, 115 ft. (35 meters) of 1/2" x 1/2" (12 mm x 12 mm) or 57 ft. (17 meters) of 1/2" x 1" (12 mm x 25 mm) joint slot.


Epoxy.com Product #964/965 is available in 1.5 gallon (5.68 L) units.


Do not install in damp or wet joints. Ambient temperature should be above 40°F (4.4°C) at time of application to assure proper curing.


One (1) year


Repeated or prolonged contact with skin should be avoided; protective gloves should be worn as a precaution. Avoid contact with eyes; in case of eye contact, flush with water for 15 minutes and consult a physician.


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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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