Flat Roof Sealant & Coating

Application Instructions

Read all label instructions before beginning. Always run a test patch first in an inconspicuous area to ensure that proper adhesion and drying occurs, and the product works to your satisfaction. Be sure surfaces are clean and dry before the coating application. All major cracks, joints, and seams should be caulked with Blue Max® Trowel Grade liquid rubber. Do not use a silicone caulk. Large cracks may be filled with a sandable filler. Follow seam taping instructions. Mask all sensitive areas before starting.

Products can be applied with a paint brush, a push broom, a low nap roller with a long handle, or a Commercial Airless Sprayer. In addition, you will need Ames® Peel & Stick™ Seam Tape, and scissors or a utility knife. For larger commercial jobs, we recommend using a commercial grade airless sprayer. Graco, Bulldog or Titan brands work well. Click Here for Sprayer Specifications

Need help? Call toll free 1-888-345-0809 to speak with a waterproofing expert.


Step 1: Prime with one or two coats of Elasto-Barrier® until roof surface is smooth and sealed.

Step 2: Roll the Contouring Roof Fabric™ into the wet coating using the push broom or roller until the coating comes up through the fabric and totally saturates it. Avoid folds and wrinkles. If you choose to overlap the fabric, overlap its entire length by three to four inches. Repeat this process until the entire surface is completely covered with fabric. Allow the embedded fabric to dry completely for 24 to 48 hours. Apply an additional coat over the surface to completely seal and fill all remaining pinhole openings in the fabric.

Step 3: Finish with one to two coats of Maximum-Stretch® or a similar Ames® product as needed to complete application. The minimum application of Elasto-Barrier® and Maximum-Stretch® is 2 gal/100 sq. ft. for each product. Low spot areas would have a minimum of 5 gal/100 sq. ft. total including Elasto-Barrier® 3 gal/100 sq. ft., Contouring Roof Fabric™, and Maximum Stretch® 2 gal/100 sq. ft.

Estimated Coverage:

Standard product coverage on smooth surface is 1-2 gallons per 100 sq. ft. More than one coat is recommended. More coats will lead to a longer lifespan for your roof.

Weather & Drying Guidelines:
Products are best applied between 50° to 90° F (10° to 32° C) on warm dry surfaces. Apply when the streets are dry, the sun is in the sky and no inclement weather is forecast. Starts to dry in 2-8 hours, depending on thickness of application and weather; cures in 24 hours. Low temperatures, high humidity and evening and morning dew will require increased drying/curing time.

Clean-up, Storage, and Disposal:
Clean tools and small spills with water. Store unused product in its original container, tightly sealed and protected from freezing. Dispose of this product in accordance with local, state, or federal requirements.

Products for  a Flat Roof

ames iron coat Metal Roof Coating



Ames® Maximum-Stretch® is a thick, high quality rubber and acrylic elastomeric roof coating designed specifically for waterproofing, repairing and maintaining many different types of roofs.


ames polyester contouring roof fabric

Contouring Roof Fabric™

Ames® Polyester Contouring Roof Fabric™ adds substantial strength to the coating of roof surfaces, reinforces the coating to resist ripping and tearing and increases penetration resistance.