Roberts FS400 First Step Primer - 4 Gallon
Roberts FS400 First Step Primer is a ready-to-use acrylic latex primer designed to improve adhesive bonding on porous flooring substrates. It helps prevent adhesive over-absorption, promotes uniform coverage, and provides alkali protection for reliable flooring installations.
Brand: Roberts
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Roberts FS400 First Step Primer: Acrylic Latex and Fast-Drying Formula
Roberts FS400 First Step Primer is a professional-grade acrylic latex primer formulated to prepare porous substrates for flooring adhesive applications. Designed to promote proper adhesion, it creates a uniform surface that helps prevent excessive adhesive absorption and supports consistent bonding performance.
The primer also helps protect flooring adhesives and finished flooring from substrate alkalinity, making it an important step in preparing suitable surfaces for direct-bond flooring installations.
FS400 features a ready-to-use, single-component formula that requires no dilution or additional mixing. It can be applied with a roller to properly prepared, dry substrates, including concrete, APA-rated underlayment-grade plywood, OSB, cement backer board, gypsum and lightweight concrete, and floor patches. It is also suitable for radiant heated floors with surface temperatures below 85°F (30°C).
With a drying time of approximately 30–60 minutes and a VOC content of 0 g/L, FS400 supports efficient indoor flooring preparation. Each 4-gallon pail includes a convenient pour-spout lid and provides coverage of approximately 1,400–1,600 sq. ft., depending on substrate porosity and application conditions.
Roberts FS400 First Step Primer is a reliable surface preparation solution for residential and commercial flooring projects requiring improved adhesive bonding and consistent installation results.
Important: Apply only to properly prepared, dry substrates. Allow the primer to cure for 30–60 minutes before proceeding with adhesive installation. Follow the adhesive manufacturer's installation instructions and verify substrate compatibility.
Key Features and Benefits
- Ready-to-Use Acrylic Latex Formula
The single-component acrylic latex formula requires no mixing or dilution, making application quick and convenient. Simply apply to properly prepared, dry substrates - Improved Adhesive Bond Performance
Creates a uniform surface that promotes proper adhesive bonding, helping improve installation consistency and flooring performance - Prevents Adhesive Over-Absorption
Seals porous substrates to help prevent excessive adhesive absorption, supporting more consistent adhesive coverage and reducing unnecessary material consumption - Alkalinity Protection
Helps protect flooring adhesives and finished flooring from substrate alkalinity, supporting long-term installation performance - Fast Drying Formula
With a curing time of approximately 30–60 minutes, FS400 helps reduce installation delays and allows flooring work to proceed efficiently - Broad Substrate Compatibility
Suitable for a variety of porous substrates, including concrete, plywood, OSB, cement backer board, gypsum concrete, lightweight concrete, and floor patches - Low VOC Content
Contains 0 g/L VOC, making it a suitable option for indoor flooring preparation projects where low-emission materials are preferred - Convenient 4-Gallon Packaging
Supplied in a 4-gallon pail with a pour-spout lid for easier dispensing and handling. Covers approximately 350–400 sq. ft. per gallon
| SKU | ROBERTS FS400 4 |
|---|---|
| UPC | 075378001171 |
| Weight (lbs.) | 36.4 |
| Non-Returnable | No |
| Manufacturer | Roberts |
| Manufacturer Part Number | FS400-4 |
| Dimensions (L x W x H) | 12.5" x 12.5" x 12.75" |
