DE NEEF® Deneseal 5050

Primer for DeneSeal P-2235, Polysulfide Joint Sealant

Product Description

DeneSeal 5050 Primer is a low viscosity, two component epoxy primer for DeneSeal P-2235 polysulfide sealant for both steel and concrete surfaces.

Packaging & Handling

0.25-Gallon Unit, 2 component


75 square feet per unit at 3-5 mils
100 square feet per unit at 2-3 mils

Store in a dry place at temperatures between 65°F and 80°F. Do not thin with solvents. Confirm product performance in specific chemical environment prior to use. Substrate temperature must be at least 5°F above the dew point.

Product Advantages

  • Low viscosity
  • Easy 1:1 mixing
  • Easy to apply
  • Fast recoat time


Do not apply in temperatures less than 40°F or greater than 95°F. (material cures slower at cooler temperatures). Material should be stored in a dry place at temperatures between 65 and 80°F. Do not thin with solvents. Confirm product performance in specific chemical environment prior to use. Substrate temperature must be at least 5°F above the dew point.


DeneSeal 5050 Primer

Mix Ratio 1:1
Storage 65-80 °F
Application T, ambient 40-95 °F
Application T, substrate ≥5°F above dew point
Shelf Life 1 year
Pot life at 77°F 3 hours
Recoat concrete >2 hours <36 hours
Recoat steel >3 hours<36 hours
VOC >0.452 lb/gal; 50g/L
Volume solids 65%

Health and Safety

DeneSeal 5050 Primer is flammable, and all precautions for flammable materials should be taken when using.

Always use protective clothing, gloves and goggles consistent with OSHA regulations during use.

Avoid eye and skin contact.

Do not ingest.

Refer to Safety Data Sheet for detailed safety precautions.

In the event of an EMERGENCY call: CHEM-TREC 800-424-9300.

Installation Guidelines

Concrete: Apply only to clean, dry and sound concrete substrates that are free of all coatings, sealers, curing compounds, oils, greases or any other contaminants. Concrete that has been contaminated with chemicals or other foreign matter must be neutralized or removed. Remove any laitance or weak surface layers. Concrete should have a minimum surface tensile strength of at least 300 PSI, as verified by an Elcometer test. Surface profile shall be CSP-3 to CSP-5 meeting ICRI (International Concrete Repair Institute) standard guideline #03732 for coating concrete, producing a profile equal to 60-grit sandpaper or coarser. Prepare surface by mechanical means to achieve this desired profile. Refer to DE NEEF® Surface Preparation Guidelines for more details.

Steel: For steel surfaces, a “White Metal” abrasive blast with an anchor profile of 2-4 mils in accordance with Steel Structures Painting Council Specification SP-5-63 or NACE No. 1 is required for immersion service. For splash and spillage exposure, a “Near White”, SP-10-63 or NACE No. 2 is required.

  1. DeneSeal 5050 Primer can be applied by brush or roller.
  2. Apply DeneSeal 5050 Primer at a rate not to exceed 75 sq. ft./0.25 gallon unit for concrete and 100 sq. ft./unit for steel. Rolling coating is an alternate method of application, but coverage will be significantly less.
  3. The curing time for DeneSeal 5050 Primer is between 2 and 36 hours. The first coat of DeneSeal P-2235 must be applied within 36 hours of priming. If more than 36 hours elapse, the primer must be reapplied.
  4. Use of a brush will allow for joints to be primed before the application of DeneSeal P-2235.
  5. For best results, clean tools and equipment with a nonflammable and non-evaporating cleaner. Always wear gloves when using this product. | North America customer service: 1-877-4AD-MIX (1-877-423-6491)

We hope the information here will be helpful. It is based on data and knowledge considered to be true and accurate, and is offered for consideration, investigation and verification by the user, but we do not warrant the results to be obtained. Please read all statements, recommendations, and suggestions in conjunction with our conditions of sale, which apply to all goods supplied by us. No statement, recommendation, or suggestion is intended for any use that would infringe any patent, copyright, or other third party right.

DE NEEF is a trademark, which may be registered in the United States and/or other countries, of GCP Applied Technologies Inc. This trademark list has been compiled using available published information as of the publication date and may not accurately reflect current trademark ownership or status.

© Copyright 2018 GCP Applied Technologies Inc. All rights reserved.

GCP Applied Technologies Inc., 2325 Lakeview Parkway, Suite 450, Alpharetta, GA 30009, USA
GCP Canada, Inc., 294 Clements Road, West, Ajax, Ontario, Canada L1S 3C6.
This document is only current as of the last updated date stated below and is valid only for use in the Canada. It is important that you always refer to the currently available information at the URL below to provide the most current product information at the time of use. Additional literature such as Contractor Manuals, Technical Bulletins, Detail Drawings and detailing recommendations and other relevant documents are also available on Information found on other websites must not be relied upon, as they may not be up-to-date or applicable to the conditions in your location and we do not accept any responsibility for their content. If there are any conflicts or if you need more information, please contact GCP Customer Service.

Last Updated: 2022-04-27