SLABLOC® 50 is a high-performance, water-extended clear epoxy primer designed to penetrate and seal challenging concrete surfaces. Facility teams and professional contractors rely on this low-viscosity primer to ensure strong adhesion in demanding commercial and industrial environments. It provides reliable concrete substrate preparation before the application of advanced moisture-mitigation systems or resinous topcoats.
Intended Users and Applications
- Designed for professional concrete flooring contractors, facility maintenance teams and industrial applicators.
- Ideal for commercial and industrial facilities, including food and beverage processing plants, healthcare facilities and manufacturing environments.
- Used as a pre-primer on new concrete after 3 days or existing slabs contaminated with silicate hardeners.
- Not recommended for concrete damaged by battery acid.
Problems This Product Solves
- Overcomes severe surface contamination from previously applied sodium, potassium or lithium silicate curing agents.
- Prevents disruptive outgassing when applying 100 percent solids epoxy coatings over porous concrete slabs.
- Stops flooring failures by establishing a secure adhesive bond on challenging or poorly conditioned substrates.
- Accelerates project timelines by allowing application on green concrete just 3 days after the initial pour.
- Reduces moisture-related risks by supporting up to 13 pounds of moisture vapor transmission when used under compatible topcoats.
Key Features and Benefits
- Water-extended formulation: Reduces overall viscosity to deeply penetrate the concrete substrate and lock out contaminants.
- Exceptional adhesion properties: Creates a secure bond exceeding 400 PSI to prevent future delamination or peeling.
- Versatile application window: Cures effectively on fresh concrete to keep fast-track construction projects on schedule.
- Comprehensive regulatory compliance: Meets USDA, FDA, LEED and Green Seal requirements for safe use in sensitive environments.
- Ultra-low VOC profile: Complies with all North American environmental standards to maintain safe indoor air quality during installation.
Performance Characteristics
- Volatile organic compounds (VOC): Less than 5 g/l
- Pot life: 2 to 3 hours (one-gallon mass at 77 degrees Fahrenheit)
- Mix ratio: 4:1:1 by volume (Part A, Part B and potable water)
- Dry to touch: 4 to 6 hours at 50 to 90 degrees Fahrenheit
- Adhesion strength: Greater than 400 PSI (concrete failure)
- Moisture vapor transmission limit: Up to 13 pounds (when used as a primer)
System Compatibility and Use Context
SLABLOC® 50 serves as the exclusive pre-primer for SLABLOC® 100 moisture-mitigation systems. It functions perfectly as a foundational layer under all Alta Paints & Coatings and Desert Polymer Flooring epoxy flooring systems and polyurethane products. Installers must pair it with a Class A 15-mil moisture barrier for slabs in direct contact with soil requiring a positive side moisture barrier. This primer reacts negatively to battery acid damage and requires alternative preparation in those specific environments.
Installation and Application Overview
Contractors must ensure the concrete substrate is structurally sound, free of bond-breaking materials and prepared to a concrete surface profile of CSP 2 or higher. The concrete pH should measure 9 or above before application. Pre-mix the A and B components for two minutes, add one quart of potable water and mix for one additional minute. Pour the material immediately in ribbons, spread evenly with a V-notched rubber squeegee and back-roll crosswise to ensure consistent coverage. Apply the product in ambient temperatures between 60 and 90 degrees Fahrenheit with relative humidity below 85 percent.
Frequently Asked Questions
Can I use SLABLOC® 50 on green concrete?
Yes, contractors can apply this primer over green concrete 3 days after the initial pour.
How much moisture vapor transmission can this primer handle?
This material holds up to 13 pounds of moisture vapor transmission when used as a primer under epoxy and polyurethane systems.
What happens if my concrete has residual silicate hardeners?
SLABLOC® 50 is specially engineered to penetrate and bond with concrete substrates contaminated by sodium, potassium or lithium silicate curing agents.
How do I mix the components?
Pre-mix the A and B components for two full minutes, add exactly one quart of potable water and mix for one more minute.
What is the required surface preparation?
Contractors must prepare the floor to a concrete surface profile of CSP 2 or higher and ensure the concrete pH is 9 or above.
Can I use this product over battery acid stains?
No, the formulation reacts negatively to battery acid-damaged concrete and requires alternative preparation methods.
SLABHARD® is a shared product brand of Star Step Performance Coatings Group available through both Desert Polymer Flooring and Alta Paints & Coatings. For additional information, visit www.slabhard.com