Epirez Acid Resistant Epoxy Binder (133AR) 20L
Available
Epirez is an Australian epoxy systems brand supplying structural epoxy grouts, floor coatings, concrete repair compounds, crack sealers, chocking compounds, and acid-resistant coatings to construction, mining, processing, and industrial maintenance operations across Australia.
Epirez 133AR is an acid-resistant epoxy mortar binder — it bonds aggregate to form an acid- and chemical-resistant epoxy mortar, for use where standard epoxy mortar would be attacked by acids or aggressive chemicals. This is a mortar binder mixed with aggregate, not a standalone floor coating.
Where this product is used
Used across construction, industrial maintenance, mining, and processing plant projects wherever mortar toppings or linings need to resist acid or chemical attack.
- Mortar toppings and linings in battery rooms, acid storage areas, and chemical handling facilities.
- Chemical processing plant floors and containment bunds subject to acid spillage.
- Concrete protection where a standard epoxy mortar binder would fail due to chemical attack.
Key specifications
| Specification | Detail |
|---|---|
| Mix ratio | 1 part hardener : 3 parts compound (by volume only) |
| Pot life (25°C) | 30 minutes |
| Full cure time | 24 hours @ 25°C |
| Full chemical resistance | 7 days @ 25°C |
| Compressive strength | 75 MPa (neat) |
| Flexural / tensile strength | >10 MPa |
| Tensile bond strength | 3.8 MPa (concrete substrate failure) |
| Abrasion resistance | Excellent — withstands steel-wheel traffic |
| Chemical resistance | Resists 98% sulphuric acid (rated Very Good) plus a wide range of acids and alkalis |
| Temperature resistance | Wet 65°C; dry 150°C |
| Coverage rate | 1L covers 1m² @ 1mm DFT neat; 1 part binder + 3 parts QA2 aggregate covers approx. 0.75m² @ 4mm; as a primer, approx. 5m²/litre |
| Application temperature | 10–30°C |
| Shelf life | 2 years in sealed containers, stored 10–30°C |
| Pack size available | 20L |
Selecting the right option
133 is the standard general purpose binder for horizontal work; 633 is non-sag for vertical and overhead applications; 133AR (this product) is acid resistant. For moderate acid exposure on floors where a coating rather than a mortar is needed, see our separate acid-resistant floor coating range. Confirm chemical compatibility with the specific acids present in your environment before specifying, and mix with Epirez QA2 aggregate at the specified ratio.
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