SMARTCOAT™ 400 High Performance Acrylic Coating is a heavy-bodied elastomeric roof coating manufactured with 100 percent acrylic-based polymers, reflective white pigments, and high-grade biocides. SMARTCOAT 400 remains bright white after weathering, and delivers extremely high thermal and IR resistance with a 0.91 emissivity rating. This product achieves excellent bond strength to all common roof substrates including metal, single-ply, built-up, and modified bitumen roofs. SMARTCOAT 400 has extremely high elastomeric properties, making it a tough and durable solution to seal roof surfaces in all North American climates, prolong roof service life, and reduce interior building temperatures and associated cooling costs. SMARTCOAT 400 is formulated to exceed the parameters of ASTM D 6083, Type I.

Technical Information


White, Tan


5G, 55G, 275G

Weight (lbs.)

58, 660, 3125

Maximum VOC


Solar Reflectivity (Initial/Aged)


Thermal Emissivity (Initial/Aged)



4-8 hours

Full Cure

24-48 hours

Tensile Strength

224 psi



Tear Resistance

71 lbf/in

Solids by Volume


Solids by Weight



Coverage: 1.5 gallon per 100 square feet per coat, minimum 3 gallons per 100 square feet in two coats. 

Precautions: DO NOT APPLY TO FLAT SURFACES WITH POOR DRAINAGE OR WHERE PONDING WATER WILL EXIST. SMARTCOAT 401 is not recommended over gravel, walking decks, or old roofs that are too brittle and dry. 

1. Clean roof surface thoroughly with SMARTCOAT 100 Roof Wash. Surface must be free of contamination that may inhibit adhesion. Surface must be clean and dry, free of moisture both on and beneath the surface before applying PRIMER, MASTIC (if applicable), or COATING.

2. If adhesion test indicates primer is required, prime surface with SMARTCOAT 210 Universal Primer; apply SMARTCOAT 200 Asphalt Bleed Blocker on bituminous surfaces to prevent staining.

3. Seal/repair roof as needed with SMARTCOAT 300/301/370.

4. Mechanically mix COATING before using. Apply only at temperatures between 50ºF and 110ºF and no threat of rain for 48-72 hours. Apply on warm, sunny days, preferably in the morning hours to provide maximum cure time.

5. Apply SMARTCOAT 401 with a heavy-duty roller or suitable spray equipment at the minimum stated coverage rate, or in accordance with SMARTCOAT specification. Allow coating to dry a minimum of four hours between coats.

6. Clean tools with mineral spirits or paint thinner if coating has dried, or with warm and soapy water if coating is still wet.

For more information, see published SMARTCOAT specifications at

For Construction Details and Specs Click Here


Warranty Details

CertainTeed offers three asphaltic low-slope roof system warranty options: Limited Warranty on Materials, Integrity Roof System Limited Warranty, and Integrity Roof System No Dollar Limit (NDL) Limited Warranty. CertainTeed warranty durations are based on a combination of system specification and product selection. Please download an overview of these warranty options for details. Consult with your contractor or CertainTeed Territory Manager to determine which warranty is best for your project.

CertainTeed offers standard asphaltic low-slope roof system warranty durations between ten and twenty-five years. Additionally, Gold Star Contractors can increase warranty durations by 25% by engaging in an Integrity Maintenance Agreement with their client.

Commercial Roofing Distributors

See All Distributors near You
Get Started