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Waterproof Sealants and Coatings For Roof Decks & Patios

Waterproofing & Protecting Your Roof Deck or Patio!

Our commercial roof deck & patio waterproofing sealants and primers are perfect for keeping your roof deck & patio dry, sealed and protected against the elements. View our entire selection below, as well as detailed application instructions for getting the best results from our commercial roof deck & patio waterproofing products.

How To Guide for Roof Decks & Patios

It may feel and look like a difficult process but we are here to help ease the project of protecting your Roof Deck & Patios. In a few steps we will guide you to coating and sealing your project with images and video guides(coming soon). These methods can be used for a private and/or commercial application process. If at any point you need help or run into an issue not covered in this guide please call or email us.
Note this is for a Deck application, not a roofing application and requires fewer steps due to the nature of use.
For Roof application please click here.

Products In this Project

 A single component watertight acrylic coating designed to restore older deck surfaces. For use on decks, fences, rails, walkways, and ramps. Suitable for use on properly prepared exterior wood, and concrete/masonry surfaces. 

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A single component watertight urethane/acrylic coating designed to restore older deck surfaces, available in a smooth finish. For use on decks, fences, rails, walkways, and ramps. Suitable for use on properly prepared exterior wood, and concrete/masonry surfaces. 

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A contouring, self-adhesive, heavy duty seam tape that is the perfect match with any of our coatings. Peel & Stick™ Seam Tape reinforces and creates a barrier over roof vents, flashings, seams in metal, or any crack or gap. Changes in temperature cause your home to expand and contract. Ames® Seam Tape reinforces these areas to resist cracking.

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Elasto-Barrier® is a water-based, adhesive, elastomeric, liquid rubber primer & base-coat designed to seal, protect, maintain, and renew existing roofs. Use on properly drained tar & gravel roofs in areas subjected to ponding water as a part of Ames® Roof Coating Systems. Must be top coated with a suitable Ames® UV-Resistant top-coat.

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Surface Preparation

Initial Cleaning

    • Proper initial cleaning of your substrate includes removing dirt, contaminants, and debris from existing surfaces. All loose contaminants that could prohibit proper adhesion of the Ames Safe-T-Deck or Peel & Stick Seam Tape and Elasto-Barrier Liquid Membrane to the substrate can normally be removed with a stiff bristle broom, vacuuming, or other means unless the buildup is severe then a pressure washer may be required.

Inspection of Substrates

    • Inspect substrate for suitability to proceed with Ames Elasto-Barrier, Safe-T-Deck or Peel & Stick Seam Tape.
    • If there are substrate issues bring these issues to the project supervisor, architect, customer, or Ames Research Labs Tech Services attention for recommendations.

Substrate Conditions - are specific to the type of surfaces you are working on. Incorrect conditions can cause installation deficiencies that could affect the performance of your waterproofing installation.

Inspect Substrates for:

    • Protruding or missing fasteners
    • Loose or broken backer board
    • Excessive gaps between backer board panels
    • Excessive gaps at intersections of backer board to other adjacent items
    • Excessive gaps at cutouts for water pipes, shower heads
    • Rough sharp ridges in mortar sloping material
    • Dried crumbs of mortar slag on the surface of the shower base.
    • Mortar blocking mounting holes between Drain Base and Clamping Ring
    • Presence of mold or mildew on walls or sheathing due to extended exposure to the elements or other pre-existing conditions.
    • Wood Moisture content – at or below 20% as tested at core of substrate. This will typically be a consideration when the floor sheathing has been properly pre-sloped and is the intended substrate for the Blue Max Tile Waterproofing membrane.
    • For remodeling projects, a guideline for all types of existing substrates being protected with Blue Max Tile - Liquid Membrane Waterproofing is that aged materials need to be inspected for any possible need to repair or replace before proceeding with new applications. Structural and Environmental integrity is important in the underlying material as it will become a base for the new Ames Waterproofing System. An example of when aged and otherwise deteriorated substrates may be encountered could be when an aged existing shower or tub is being removed and a tile system is being installed.

General Guidelines

    • Ames Research Laboratories, Inc. recommends that these application suggestions be used as a guideline for applying Ames’ products. Please remember these are only suggestions.
    • Product durability depends upon surface preparation and sufficient material usage for thickness.
    • Read all instructions on the label before beginning.
    • Always run a test patch first in an inconspicuous area to ensure that proper adhesion and drying occurs with your product and that the product works to your satisfaction before proceeding.
      Do not proceed unless you are satisfied.
      For product information or technical assistance, call 1-888-345-0809 or contact us via email.

Weather & Drying Guidelines

    • For exterior application, our products are best applied between 50 to 90°F (10 to 32°C) on warm dry surfaces. Be sure humidity is less than 50% and dew point and temperature have a good spread.
    • When top coating, keep in mind that white or light colored coatings will reflect nearly all solar rays and dry at a much slower rate than dark colored coatings. If you live in the northern hemisphere the best time to apply white products is the summer months when there is plenty of sunlight. In contrast, darker coatings absorb more sunlight and dry more quickly.


Paint brush and 3/8” to 1/2” nap roller with a long handle and paint tray. For Roof Deck application you may need a push broom, Ames® Seam Tape, Ames® Roof Fabric and scissors.


Before beginning any work and installation process, after the above General Application Tips and Guidelines have been performed, a detail inspection of the application area must be performed. This can be done independently or with your contractor. This is to insure that your project conditions and Ames installation guidelines match.

Detail Work

Procedures for Completing Detail Work

    • If needed, pressure wash the surface to assure a clean surface free of debris. Additionally you may need to sand the surface to make sure no loose or protruding pieces of wood are present.

Deck Inspection

    • After inspection and cleaning, divots, checks, or imperfections may be present. Using either Blue Max Trowel Grade, Blue Max Caulk or a wood filler, fill all imperfections to create a smooth flat surface.

Fill Holes & Divots etc

    • As you can see the wood deck has been cleaned, sanded and all holes, divots and loose sharp pieces have been cleared from the surface. This is the ideal surface conditions.
    • New planks of plywood will look different and will most likely only require a light cleaning.


After inspection, repair, pre fill joints, corners and cracks, you can begin the application of Blue Max Regular Grade Liquid Membrane. Although most application process will only require two coats, please pay careful attention to mil depth and condition of your substructure.

Application Steps

Three Step Process
Step One

Pour out a liberal amount (1 gal. / 100 sq. ft.) of Ames® Elasto-Barrier® onto the surface. Roll Ames® Contouring Roof Fabric into the wet coating using the push broom or roller until the coating comes through the fabric and totally saturates it. Avoid folds and wrinkles. Repeat this process until the entire surface is completely covered with fabric. Allow to dry completely 24 to 48 hours with no rain or freezing temperatures.

Step Two

Then apply a second coat of Ames® Elasto-Barrier® (1 gal. / 100 sq. ft.) over the deck to help seal and fill all remaining pinhole openings in the fabric. Allow minimum 24 hours drying between coats. The coating is best applied by pouring it out in small quantities and spreading. To complete the application, apply a third coat of Ames® Elasto-Barrier® (1 gal. / 100 sq. ft.) over the deck to completely seal and help hide the texture of the fabric.

Step Three

Top coat with two coats of Ames® Safe-T-Deck® (1 gal. / 100 sq. ft. per coat) the color of your choice. Allow proper drying time between coats (minimum 24 hours).

Cutaway example of all layers on roof deck
Seem Tape on Plywood
Safe-T-Deck Gray on Plywood

Post Application

Weather & Drying

Ames® products are best applied between 50° to 90° F (10° to 32° C) on warm dry surfaces. Products start to dry in 2-8 hours. If possible, wait a minimum of 24 hours between coats for best results. Depending on thickness of application and weather the products cure in 24 hours. Low temperatures, high humidity and evening and morning dew will require increased drying/curing time.

Clean Up & Storage

Clean tools and small spills with pure water, no soaps or detergents needed. Store unused product in its original container, tightly sealed and protect from freezing. If unopened, most Ames products will last on the shelf for two (2) years. Dispose of this product in accordance with local, state, or federal requirements.

Health & Safety
      • Use hand and eye protection when using this product
      • Wash with soap and water after contact with skin
      • If eye contact occurs rinse with clean water and seek medical advice if symptoms continue
      • Keep out of reach of Children.
      • CA Prop 65 This product may contain chemical(s) known to the state of California to cause cancer and/or birth defects or other reproductive harm.
Inspection, Testing & Repair
  • Inspect after final coat is dry and repair any obvious deficiencies.
  • Document the substrate conditions before, during and after completion of an Ames Liquid Membrane project. (professional application only)
  • If excessive materials remain this indicates insufficient dry millage of the product was applied.
  • Continue to apply all unused materials to the surfaces until materials are depleted and the calculated dry millage for the project is reached and to recommend product specifications.
  • Follow all warranty guidelines and requirements.

Featured Products

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Roof Fabric & Tape

AMES Technical & Sales Support Staff

AMES trained support team has over 80 years of combined knowledge and experience in the paint and coatings industry. They are available Monday through Friday from 7:30am to 4:30pm PST to answer any questions you have about AMES waterproofing roof coating and sealant products, the application process, becoming a Retailer/Distributor or reaching out to locate contractors and much more.