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Deco 20 Seal: Concrete Waterproofing Membrane

Wall Coating


• Approved by the International Code Council  Eliminates the need for 6 mil poly
• Will stop water leaks in nonstructural cracks  Standard color is gray – can be painted over
• Can be applied to damp walls  Allows for better curing of concrete walls
• Continuous coating, eliminates seams  Airless sprayer application
• Can be applied from the footing to top of wall  Reduces potential mold growth

Product Description

Deco 20 Seal is a waterproofing membrane made by Deco Products.  It is an advanced hybrid acrylic resin coating.  It is specifically designed for the demanding requirements of waterproofing foundation walls.  This includes parged and non-parged masonry, pre-cast and poured concrete. On non-parged masonry walls, DECO PRIMER must be applied prior to the application of  Deco 20 Seal. Because of the water-based nature, this product can also be applied to ICF forms. Deco 20 Seal is designed for use as a waterproof coating when hydrostatic pressure caused by the water table does exist.

New construction: Waterproofs and seals masonry,  pre-cast and poured concrete foundation walls.  For approved applicators.

View ICC Report


Deco 20 Seal waterproofing materials have been independently tested and approved by the International Code Council, a trusted organization that sets standards for building construction. This product has been used in the industry for over 25 years and has a proven track record of protecting foundations from water damage.

Technical Specifications

Deco 20 Seal can be Applied to

ICF and Styrofoam Forms

Deco 20 Seal meets or exceeds the following ASTM tests:
► ASTM C 1306, Hydrostatic pressure over cracks
► ASTM C 836, Section 6.7 Low-temperature flexibility and crack bridging
► ASTM C 836, Section 6.10 Adhesion strength
► ASTM D 2939, Section 15 Resistance to water
► ASTM C 836, Section 6.9 Remain in place during application (film thickness)
► ASTM E 96, Water vapor permeance (transmission)
► ASTM C 836, Section 6.12 Extensibility after heat aging
► Additional Testing Outside the Scope of AC 29
► ASTM E 154, Section 13 Resistance to decay
► ASTM D 2565-1999, Color fastness of surface coating
► ASTM D 3273-94, Resistance to mold growth of surface coating

Deco 20 Seal is warranted as specified from date of C.O. (Certificate of Occupancy).


Deco 20 Seal Technical Data Sheet

Deco 20 Seal ICC Report

Deco 20 Seal Applicators Guide

Purchase Deco 20 Seal Waterproofing from Deco Product, Inc.

Deco products, Inc. manufactures all of their products in Denver, CO but has suppliers and warehouses set up throughout the USA and in Puerto Rico. To find the nearest place to purchase please call our home office at Toll Free 1-800-500-DECO (3326) or contact us today.

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Based on 24 reviews
Timothy King
Timothy King
January 6, 2024.
Best sealers in the industry. Breck is a great guy that provides exceptional customer service. You can call anytime and he’ll always pick up the phone to answer any questions!
Stuart S
Stuart S
October 18, 2023.
I wanted to take the time to truly thank the people at Deco Products for helping me. I explained my situation and I was very grateful and happy to have been treated with respect and kindness with a quick and efficient solution in a timely manner. Many thanks Gentlemen, I greatly appreciate your help.
Reece Sleater
Reece Sleater
October 4, 2023.
Deco Products should be your go to sealer. Their sealers are easy to apply and produce great results. Aside from their sealers it is impossible to beat their customer service. If you need help on a job they are there to walk you through it in person. Breck is the man, he came out to the job site and walked me through the process.
Glenstone Power Wash
Glenstone Power Wash
August 11, 2023.
Great class
Skills Pressure washing LLC
Skills Pressure washing LLC
August 11, 2023.
Good product, good service 👍👍
Jeff Mansfield
Jeff Mansfield
April 5, 2023.
Deco products are amazing, the job turns out perfect every time! My product rep. Breck Tatum is a great guy and is alway available to offer his help and advise. Jeff M
March 10, 2023.
Awesome job as usual.Breck….. Very informative.