Product Description
The CUSTOM BLDG PRODUCTS CP1 is a latex primer formulated to prepare surfaces for self-leveling underlayment applications. It improves adhesion and seals porous substrates before the underlayment is poured, helping to prevent bubbling, delamination, and absorption issues that can compromise the finished floor system. Sold in a 1-gallon unit, it is packaged 4 units per box. Flooring installers and tile contractors typically apply this primer as the first step in a self-leveling workflow on concrete, wood subfloors, and similar porous surfaces.
This primer is intended for use ahead of self-leveling underlayment products, including True Value 290-905 Floor Underlayment. It is suited for both residential and light commercial flooring projects where surface porosity or adhesion quality must be addressed before leveling compounds are applied. Proper surface priming is a critical step when working over concrete slabs, lightweight concrete, or plywood subfloors that may have variable absorption rates.
Key Features
- Latex-based formula seals porous surfaces prior to self-leveling underlayment application
- Improves adhesion between the substrate and the leveling compound
- Reduces risk of delamination or failure caused by rapid moisture absorption
- Compatible with True Value 290-905 Floor Underlayment
- 1-gallon unit size suited for job-site use
Compatibility
Designed for use with self-leveling underlayment systems, and confirmed compatible with True Value 290-905 Floor Underlayment. Suitable as a pre-treatment on porous subfloor surfaces ahead of level-quick style self-leveling compounds.
Installation Notes
Flooring installers should apply this primer to a clean, structurally sound subfloor and allow adequate dry time before pouring self-leveling underlayment. Remove all dust, grease, curing compounds, and loose material from the substrate before priming. Follow the underlayment manufacturer instructions for required dry time after primer application. Power tools are not required for primer application, but ensure adequate ventilation in the work area.
Technical Specifications
- Container Size: 1 gallon
- Package Quantity: 4 units per box
- Unit of Measure: BX
- Weight: 38 pounds
- Formula Type: Latex
Standard Information
- Brand: CUSTOM BLDG PRODUCTS
- Manufacturer Part Number: CP1








