Primers / Sealants

121 High-Tek Basecoat

Acrylic Elastomeric Coating

The same proven roof coatings — just with a new name.
Now part of the Gaco family of brands, 121 High-Tek Basecoat continues to provide the same proven performance contractors have counted on for decades — just with a new name. You can expect the same protection, durability, and ease of use, now backed by Gaco’s expanded portfolio and commitment to building envelope solutions.

GacoFlex 121 High-Tek Basecoat delivers an all-acrylic, highly elastomeric coating that adheres exceptionally well to most surfaces. Contractors typically use it as an asphalt primer and frequently embed it with polyester reinforced fabric.

This coating resists water and bonds strongly to urethane foam, making it a reliable choice for demanding roofing applications. Specially formulated as a first coat, it applies easily over a wide range of surfaces, including asphalt, metal roof surfaces, flat composition roofs, modified bitumen, previously coated foam roofs, aged galvanized steel, aged aluminum-coated roofs, and even aluminum and clay substrates. It provides excellent coverage, seals solvents in asphalt roofs to ensure maximum roof coating performance, and pairs ideally with polyester roofing fabric—whether refurbishing an existing roof or creating a new membrane.

At Gaco, we believe there’s a difference between just any solution and the right solution. You deserve the right solution and Gaco’s team of experts will help you find it! Find 121 High-Tek Basecoat near you or contact your local Gaco Area Manager with questions.