EPIREZ Supatuff Acid Resistant Coating
EPIREZ® Supatuff Acid Resistant Coating is a high-solids epoxy coating designed for areas requiring strong resistance to acids, alkalis and solvents. It is designed as a 300–500 micron coating system for concrete walls, columns and pump footings, and can also be used as a sealer for concrete floors where extreme chemical resistance is required.
Supatuff Acid Resistant Coating is particularly suited to chemical containment and industrial environments where concrete surfaces may be exposed to aggressive chemicals. It resists a broad range of acids, including 98% sulphuric acid, as well as alkalis and solvents.
The coating can also be used over trowelled epoxy and aggregate systems made with EPIREZ® Acid Resistant Epoxy Mortar Binder. For areas exposed to ponding and mechanical damage, this system is recommended for additional surface protection. A non-slip finish can also be created by broadcasting selected aggregate between coats.
The product was previously named EPIREZ® Supatuff AR.
Key Features and Benefits
- Acid-resistant epoxy coating: Designed for demanding chemical environments.
- 98% sulphuric acid resistance: Provides good resistance to concentrated sulphuric acid.
- Broad chemical resistance: Resists a range of acids, alkalis and solvents.
- High-solids formulation: Contains 90% solids by volume.
- Monolithic protection: Designed to provide a continuous protective coating system.
- High bond strength: Tensile bond strength is 2.7 MPa with concrete failure.
- Easy application: Can be applied by brush, roller or airless spray.
- Non-slip option: Aggregate can be broadcast between coats for a textured finish.
- Foot traffic: Foot traffic is possible after 24 hours under the stated conditions.
Where Can EPIREZ® Supatuff Acid Resistant Coating Be Used?
Supatuff Acid Resistant Coating is intended for a range of industrial, chemical and commercial environments, including:
- Food industries
- Battery manufacturers
- Mining industries
- Bund walls
- Plating shops
- Paper manufacturers
- Chemical industries
- Pharmaceutical industries
- Wastewater treatment
- Chemical containment
Suitable Surfaces and Applications
Supatuff Acid Resistant Coating is designed for application to:
- Concrete walls
- Concrete columns
- Pump footings
- Concrete floors requiring chemical-resistant sealing
- Trowelled epoxy and aggregate coating systems
The coating is recommended over trowelled epoxy and aggregate coatings made using EPIREZ® Acid Resistant Epoxy Mortar Binder, particularly in areas where ponding and mechanical damage occur.
Coverage
| Pack Size | Estimated Coverage | Application |
|---|---|---|
| 4 L | 12 m² | 2 × 150 μm DFT coats |
The product information specifies an application system of 300–500 microns. The estimating figure provided is 12 m² per 4 L at two 150 μm DFT coats.
Application of EPIREZ® Supatuff Acid Resistant Coating
Supatuff Acid Resistant Coating can be applied by:
- Brush
- Roller
- Airless spray
Apply a minimum of two coats to achieve 300 micron DFT. Allow 8–24 hours between coats at 25°C.
For optimum chemical resistance, allow the coating to cure for 7 days at 25°C before exposure to chemicals. Longer curing times should be allowed at lower temperatures.
For a non-slip finish, broadcast EPIREZ® Patching & Flooring Mortar Aggregate or another selected aggregate between coats using the “spread and sprinkle” method.
Concrete Surface Preparation
Proper preparation is important for achieving a continuous, pinhole-free coating system.
- Remove previous coatings.
- Remove loose, crumbly material and drummy areas.
- New concrete must be at least 28 days old.
- Remove oil and grease using a suitable surface degreaser.
- Hose off using high-pressure water.
- Captive blast clean to expose firmly adhered aggregate.
- Etch the surface using EPIREZ® Concrete Etch & Cleaner.
- Neutralise by washing with fresh water.
- Allow the surface to dry.
- Repair damaged concrete, blowholes, honeycombing and cracks before coating.
Concrete surfaces should be repaired so the finished coating system is monolithic and free from pinholes.
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.
Priming
Prime concrete surfaces using EPIREZ® Acid Resistant Epoxy Binder at a coverage rate of approximately 6 m² per litre.
The primer should be touch-dry before applying Supatuff Acid Resistant Coating. Apply the coating within 24 hours of priming. If this period is exceeded, the sub-base should be reprimed.
Keep primed surfaces clean before applying the coating.
Mixing Instructions
The mixing ratio is 1 part Hardener to 3 parts Compound by volume.
- Precondition the product to between 18°C and 25°C before use.
- Review the application area and establish the volume required for the planned application rate.
- Add Hardener to Compound.
- Mix thoroughly using a low-speed 400 rpm power mixer.
- Ensure material from the container sides, lip and stirrer is fully incorporated.
- Avoid air entrapment during mixing.
Full units are recommended because the components are pre-measured.
Drying and Cure Times
- Work time at 25°C: 45 minutes
- Tack-free time at 25°C: 6 hours
- Recoat time at 25°C: 8–24 hours
- Hardening time at 25°C: 24 hours
- Full chemical resistance: 7 days at 25°C
- Foot traffic: 24 hours
Chemical Resistance
Supatuff Acid Resistant Coating has been tested for chemical resistance after 112 days of room-temperature curing at 25°C.
| Chemical | Resistance |
|---|---|
| Sulphuric Acid 98% | Good |
| Sulphuric Acid 30% | Good |
| Hydrochloric Acid 32% | Very good |
| Nitric Acid 20% | Good |
| Sodium Hydroxide 20% | Excellent |
| Sodium Hydroxide 50% | Very good |
| Sodium Hypochlorite | Very good |
| Ammonia Solution 10% | Very good |
| Mineral Spirits | Excellent |
| MEK | Very good |
| Acetic Acid 10% | Good |
| Hexane | Very good |
| Lactic Acid 5% | Very good |
| Toluene | Very good |
| Phosphoric Acid 20% | Very good |
| Ethyl Acetate | Very good |
Temperature Resistance
The maximum stated operating temperature for EPIREZ® Supatuff Acid Resistant Coating is 65°C.
Important Product Limitations
- Do not apply below 10°C.
- Do not apply to surfaces known to suffer from rising damp.
- Not recommended for application over tiles.
- Allow seven days of cure at 25°C before chemical exposure for optimum chemical resistance.
- Longer curing times are required at lower temperatures.
- Keep primed surfaces clean before applying the coating.
Storage and Shelf Life
- Store in dry conditions between 10°C and 30°C.
- Keep away from sources of heat and naked flames.
- Protect from frost.
- Minimum shelf life is two years when stored in original sealed containers.
Technical Specifications
| Specification | Technical Data |
|---|---|
| Product | EPIREZ® Supatuff Acid Resistant Coating |
| Previous Name | EPIREZ® Supatuff AR |
| Product Type | Acid resistant epoxy coating |
| Colour | Grey |
| Mixing Ratio by Volume | 1 Hardener to 3 Compound |
| Solids Content | 90% v/v |
| Application Temperature | 10°C to 30°C |
| Work Time @ 25°C | 45 minutes |
| Tack Free Time @ 25°C | 6 hours |
| Recoat Time @ 25°C | 8–24 hours |
| Hardening Time @ 25°C | 24 hours |
| Full Chemical Resistance | 7 days at 25°C |
| Maximum Operating Temperature | 65°C |
| Tensile Bond Strength | 2.7 MPa (concrete failure) |
| Application Thickness | 300–500 microns |
| Estimated Coverage | 12 m² per 4 L at 2 × 150 μm DFT coats |
| Application Methods | Brush, roller or airless spray |
| Shelf Life | 2 years |
Important: Always read the current manufacturer's Technical Data Sheet before mixing, surface preparation or application.
Why Buy EPIREZ Supatuff Acid Resistant Coating 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 coating 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, flooring, concrete repair 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.
Colour accuracy disclaimer: We have taken care to display the most accurate visuals of our products. However, we are not responsible for the colour accuracy of the device you are viewing our swatches on. These variations arise due to different computer monitors and devices (make, model and technology, as well as resolution, contrast and brightness control settings) in much the same way a scan will differ from an original image and a colour photocopy. Furthermore, coatings can exhibit variation in perceived colour depending on gloss level and application method. If you require a very specific colour match, please make your selection via actual swatches and colour boards available at our showroom.
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.
