EPIREZ® Acid Resistant Epoxy Binder 133AR is a chemically resistant epoxy binder designed to be combined with selected aggregates to create trowel-applied epoxy mortar and composite flooring systems.
It is designed for concrete surfaces requiring resistance to aggressive chemicals, including concentrated sulphuric acid, alkalis and solvents. The cured epoxy mortar system also provides excellent adhesion, abrasion resistance, erosion resistance and impact resistance.
For flooring applications, the recommended mortar screed uses 1 volume of EPIREZ Acid Resistant Epoxy Binder to 4 volumes of EPIREZ Patching & Flooring Mortar Aggregate (QA2). The resulting epoxy mortar can be trowelled to create a chemically resistant surface with a minimum thickness of 4 mm.
The binder can also be used for horizontal and vertical repair mortars, with different aggregate ratios depending on the application.
Key Features and Benefits
- Broad chemical resistance: Resists a wide range of acids, alkalis and solvents.
- 98% sulphuric acid resistance: Provides very good resistance to concentrated sulphuric acid.
- Excellent mechanical properties: Ultimate compressive strength is 75 MPa.
- High abrasion resistance: Rated excellent and withstands steel wheels.
- Impact and erosion resistance: Designed for demanding industrial flooring applications.
- Excellent adhesion: Tensile bond strength is 3.8 MPa with concrete failure.
- Solvent-free: Contains 100% solids.
- Monolithic protection: Designed to create a continuous chemically resistant mortar system.
- Aggregate compatible: Can be combined with selected aggregates for different mortar applications.
- Weather resistance: Rated excellent in the technical data.
Where Can EPIREZ Acid Resistant Epoxy Binder Be Used?
EPIREZ Acid Resistant Epoxy Binder 133AR is intended for demanding industrial and commercial environments, including:
- Food industries
- Mining industries
- Plating shops
- Wastewater treatment plants and sewers
- Paper manufacturers
- Chemical plants
- Pharmaceutical industries
- Bleaching areas
- Chemical containment areas
Coverage and Estimating Data
| System | Estimated Coverage | Thickness |
|---|---|---|
| 20 L EPIREZ® Acid Resistant Epoxy Binder | 20 m² | 1 mm thick |
| 20 L Binder + 60 L EPIREZ Patching & Flooring Mortar Aggregate (QA2) | 15 m² | 4 mm thick |
Surface Preparation
Concrete surfaces should be clean, sound and properly prepared before applying the epoxy system.
- Remove previous coatings and all loose material.
- New concrete must be at least 28 days old.
- Remove oil and grease contamination using a suitable surface degreaser.
- Hose off using high-pressure water.
- Captive blast clean to expose firmly adhered aggregate.
- Rinse with water and allow the surface to dry.
Alternatively, concrete can be acid etched using 1 part commercial muriatic acid to 2 parts clean water. Neutralise the surface with fresh water and allow it to dry.
Steel Surface Preparation
Steel should be abrasive blast cleaned to AS 1627 Part 4:2005 to a Class 3 white-metal finish with a minimum profile height of 75–100 microns.
The surface should be free from grease, oil and other contaminants. The stated contamination limits are:
- Chloride contaminants: Less than 7 mg/cm²
- Soluble ferrous ions: Less than 10 mg/cm²
- Sulphate contaminants: Less than 17 mg/cm²
Priming
Prime concrete surfaces using EPIREZ Acid Resistant Epoxy Binder 133AR at a coverage rate of approximately 5 m² per litre.
The primer should be touch-dry before proceeding. Apply the Acid Resistant Epoxy Binder mortar within 24 hours of priming. If this period is exceeded, the sub-base should be reprimed.
Keep primed surfaces clean before applying the mortar system.
Mixing Instructions
The mixing ratio for the binder is 1 part Hardener to 3 parts Compound by volume.
- Measure enough Hardener and Compound for approximately 30 minutes of use.
- Mix using a low-speed 400 rpm power mixer.
- Ensure all material from the container sides, lip and stirrer is incorporated.
- Avoid air entrapment during mixing.
- When preparing mortar, add EPIREZ® Patching & Flooring Mortar Aggregate (QA2) while mixing.
- Continue mixing until a uniform mortar consistency is achieved.
Full units are recommended because the components are pre-measured.
Application
EPIREZ® Acid Resistant Epoxy Binder can be applied by spray, roller or brush when used as a coating or primer.
For trowellable mortar applications, combine the mixed binder with the appropriate quantity of EPIREZ® Patching & Flooring Mortar Aggregate (QA2). Pour the mixed mortar onto the prepared substrate and apply by trowel.
Wipe the trowel occasionally and sparingly with EPIREZ® Epoxy Thinner (No. 3) to assist final trowelling.
A tight surface finish should be achieved to minimise porosity. The minimum thickness for the trowellable coating is 4 mm.
Application Conditions
- Surface and ambient temperature must be at least 10°C.
- Substrate temperature must be at least 10°C.
- Application is not recommended above 45°C surface temperature.
- The surface must be at least 3°C above the dew point.
- Relative humidity must remain below 85% during application.
- In confined spaces, relative humidity should remain below 50%.
- Do not add thinners when spraying.
Drying and Cure Times
- Work time: 30 minutes at 25°C
- Cure time: 24 hours at 25°C
- Full chemical resistance: 7 days at 25°C
For optimum chemical resistance, allow the binder and mortar systems to cure for 7 days at 25°C. Longer curing times should be allowed at lower temperatures.
Important Product Limitations
- Do not apply below 10°C.
- Application is not recommended with surface temperatures above 45°C.
- The substrate must be at least 3°C above the dew point.
- Relative humidity must be below 85% during application.
- Confined spaces require relative humidity below 50%.
- Do not add thinners when spraying.
- The minimum trowellable coating thickness is 4 mm.
- Longer curing times are required at lower temperatures.
Technical Specifications
| Specification | Technical Data |
|---|---|
| Product | EPIREZ Acid Resistant Epoxy Binder 133AR |
| Product Type | Chemically resistant epoxy binder |
| Mixing Ratio by Volume | 1 Hardener to 3 Compound |
| Solids Content | 100% |
| Application Temperature | 10°C to 30°C |
| Work Time | 30 minutes at 25°C |
| Cure Time | 24 hours at 25°C |
| Full Chemical Resistance | 7 days at 25°C |
| Mixed Viscosity | 0.7 Pa·s |
| Weather Resistance | Excellent |
| Abrasion Resistance | Excellent; withstands steel wheels |
| Ultimate Compressive Strength | 75 MPa |
| Flexural Strength | >10 MPa |
| Tensile Strength | >10 MPa |
| Tensile Bond Strength | 3.8 MPa (concrete failure) |
| Water Permeability | 1.2 × 10-16 m/s |
| Temperature Resistance — Wet | 65°C |
| Temperature Resistance — Dry | 150°C |
| Maximum Operating Temperature | 65°C |
| Minimum Trowellable Thickness | 4 mm |
| Binder Coverage | 20 m² per 20 L at 1 mm thick |
| Binder + Aggregate Coverage | 15 m² per 20 L Binder + 60 L QA2 at 4 mm thick |
| Shelf Life | 2 years |
Important: Always read the current manufacturer's Technical Data Sheet before mixing, surface preparation or application.
Why Buy EPIREZ Acid Resistant Epoxy Binder from Epoxy Warehouse?
Epoxy Warehouse is a trusted Australian supplier of professional coating systems, including epoxy, polyurethane and polyaspartic coatings. As an authorised EPIREZ® distributor, we supply EPIREZ products for industrial, commercial, chemical and specialist flooring applications.
With Australia-wide delivery, Epoxy Warehouse makes it easier to source professional coating products for projects across Australia. We are trusted by Australian customers and coating professionals and offer a specialist range for chemical protection, concrete repair, flooring and surface protection.
- Trusted Australian supplier of epoxy, polyurethane and polyaspartic coatings.
- Authorised distributor of EPIREZ products.
- Australia-wide delivery.
- Specialist products for industrial, commercial and chemical environments.
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Product Disclaimer: Ensure you read all product, technical and safety data sheets prior to application as liability falls on the applicator. All products must be applied in accordance with manufacturer’s recommended method.
