SLABSEAL® 300 is a high-solids, two-component aliphatic polyurethane finish coat engineered for demanding commercial and industrial environments. This durable topcoat provides exceptional protection for aircraft hangars, automotive showrooms and manufacturing floors. Professional contractors rely on these polyurethane floor coatings to deliver long-lasting resistance against heavy traffic, harsh chemicals and daily wear.
Intended Users And Applications
Contractor types: Professional flooring contractors, surface preparation specialists and facility maintenance teams
Application scope: Designed for new concrete installations and for resurfacing existing floors
Exclusions: Do not use this material as a primer or attempt to thin the formula with solvent
Problems This Product Solves
Prevents surface degradation from aggressive chemicals, industrial solvents and aviation fluids like Skydrol.
Resists hot-tire staining in high-traffic automotive showrooms and busy repair facilities.
Withstands heavy foot traffic, constant forklift movement and severe daily operational abrasion.
Provides an inert finish that complies with USDA, FDA and Food Safety Modernization Act standards for regulated environments.
Reduces jobsite odors and environmental impact through a high-solids, low-VOC formulation.
Key Features And Benefits
High-solids aliphatic formulation: Delivers a tough, impact-resistant finish that significantly extends the service life of the floor.
Excellent chemical resistance: Protects the concrete substrate from aggressive solvents, oils and unexpected industrial spills.
Low-VOC and low-odor chemistry: Allows for safe application in occupied spaces like schools, hospitals and commercial buildings without disrupting nearby operations.
Optional aluminum oxide compatibility: Produces a highly abrasion-resistant film with enhanced traction to improve overall facility safety.
UV-stable clear gloss finish: Maintains a pristine, professional appearance while resisting yellowing and discoloration over time.
Performance Characteristics
VOC Content: Less than 50 grams per liter
Solids by Weight: 98 percent
Mix Ratio: 3:1 by volume
Pot Life: 45 minutes at 50 percent relative humidity
Dry to Touch: 4 to 10 hours at 50 to 90 degrees Fahrenheit
SLABSEAL® 300 functions as a high-performance finish coat within comprehensive resinous flooring systems. You can pigment the clear gloss coating using SLABHARD® Polyaspartic Pigment packs for customized color applications. Installers must apply the coating over structurally sound concrete or a compatible base coat. For concrete slabs in direct contact with soil, the system requires a positive side moisture barrier meeting ASTM E1745. Do not apply the product below 30 percent relative humidity or outside the ambient temperature range of 60 to 90 degrees Fahrenheit.
Installation And Application Overview
Ensure the concrete substrate is clean, completely dry and free of curing agents, sealers or other bond breakers. Prepare the surface mechanically to achieve an ICRI Concrete Surface Profile of CSP 2 to CSP 4 depending on the specific system requirements. Pre-mix the A and B components separately to disperse all raw materials before combining them at the strict 3:1 ratio. Pour the mixed material into a paint tray to dip and roll using a 3/8 inch nap non-shedding phenolic core roller. Do not pour all contents directly onto the floor to squeegee and back-roll, as this approach will cause visible roller lines and significantly shorten your working time.
Frequently Asked Questions
What is the mixing ratio for SLABSEAL® 300?
The required mix ratio is three parts component A to one part component B by volume.
Can I use this product as a concrete primer?
No, this product is engineered strictly as a high-performance finish coat and you should never use it as a primer.
Is this coating resistant to automotive fluids?
Yes, the cured film provides excellent resistance to hot-tire staining, motor oils and aggressive aviation chemicals like Skydrol.
How long does it take for the floor to fully cure?
The system requires a full seven days at standard temperatures to achieve maximum chemical and abrasion resistance.
Can I add slip resistance to the final coat?
Yes, installers can incorporate 320 grit aluminum oxide to increase traction and meet ADA slip resistance guidelines.
What are the environmental requirements for application?
Apply the coating when surface temperatures remain between 60 and 90 degrees Fahrenheit with ambient relative humidity above 30 percent.
Supporting Assets
Review the comprehensive Technical Data Sheet and Safety Data Sheets to ensure safe handling, precise application and optimal long-term performance.
SLABHARD® is a shared product brand of Star Step Performance Coatings Group available through both Desert Polymer Flooring and Alta Paints & Coatings, delivering high-performance flooring materials and the SLABSEAL™ AutoShield system.
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Premium 100% Solids Epoxy Patching Compound
SLABFLEX® 400 is a premium-quality, 100% solids, two-part epoxy patching compound formulated to deliver high build, maximum toughness, flexibility, and excellent chemical resistance in a fast-curing paste. It is designed for repairing cracks, voids, and surface imperfections prior to coating installation or as a general-purpose epoxy patch where durability and flexibility are required.
Key Features & Benefits
100% solids, two-part epoxy system
High-build paste for crack and void repair
Excellent toughness and flexibility
Strong chemical resistance
Fast curing with rapid return to service
Compatible with many epoxy flooring and coating systems
Typical Applications
Patching surface cracks in concrete floors
Filling small voids prior to coating installation
General-purpose epoxy patching on concrete, masonry, metal, and wood
Surface preparation for epoxy floor systems
Application Overview
SLABFLEX® 400 is typically applied by hand using a trowel or putty knife. Coverage will vary depending on crack width, depth, surface texture, and application thickness. Additional epoxy systems may generally be applied once the material has hardened.
Light foot traffic is typically permitted after approximately 12 hours, with normal traffic in about 24 hours under standard conditions (70°F and 50% relative humidity). Cure times may vary based on temperature and site conditions.
Performance Properties (Typical)
Tensile Strength: 1,530 psi
Tensile Elongation: 55%
Shore D Hardness: 45
Gel Time: ~35 minutes
Limitations
Do not apply below 50°F or above 95°F
Interior use unless protected by a UV-resistant coating
Do not apply over concrete with excessive moisture vapor emissions
Shelf life is one year from date of manufacture when stored properly
Semi-Rigid Epoxy Joint Sealant & Crack Filler
SLABFLEX® 300 is a two-component, 100% solids, semi-rigid epoxy joint sealant and crack filler engineered to protect concrete joint edges and minimize deterioration caused by impact, traffic, and chemical exposure. It combines excellent adhesion with high elongation, delivering durability and flexibility not typically found in general-purpose epoxy materials.
Designed for demanding industrial and commercial environments, SLABFLEX® 300 reinforces concrete joints and cracks subjected to heavy foot traffic, forklift traffic, and chemical attack, including food acids.
SLABFLEX® 300 is available in multiple viscosities to accommodate a wide range of installation needs, including liquid, thixotropic, and paste grades.
Key Features & Benefits
100% solids, two-component epoxy system
Semi-rigid formulation for joint edge protection
Excellent adhesion and elongation
Chemical and abrasion resistant
Reinforces concrete joint and crack edges
VOC compliant in all U.S. states and Canadian provinces
Cures to an inert finish
Suitable for new construction and resurfacing projects
Typical Applications
Control joints and crack filling in concrete floors
Concrete and polymer floor joint edge reinforcement
Detector wire loops for traffic signals, electric gates, and robotics
FAA P-606 runway sealant for wires and lights
Cove base mortar binder
Industrial and commercial flooring environments
Application Overview
SLABFLEX® 300 is mixed at a 2:1 ratio by volume and installed into properly prepared concrete joints or cracks. Coverage varies based on joint width, depth, and installation method. The material is designed to armor joint edges rather than function as a soft elastomeric sealant.
Pot life, cure time, and recoat windows vary depending on temperature and whether standard-cure or fast-cure versions are used. Light traffic is typically permitted within approximately 12 hours under standard conditions.
Limitations
Best suited for application temperatures between 60°F and 90°F (regular cure)
Do not apply when relative humidity exceeds recommended limits
Higher temperatures will reduce working time
Color may vary between batches; boxing material is recommended for color consistency
