Belzona 4181
Magma-Build Acid Resistant
A heat-resistant, acid-resistant trowelable system for concrete and stone substrates exposed to impact, abrasion, and inorganic acid attack.
A heat- and acid-resistant 3-component trowelable system for repair and protection of concrete, stone, and rigid substrates subject to impact, abrasion, and inorganic acid attack.
- SeriesBelzona 4000 Series
- Documents4
Overview of Belzona 4181
Belzona 4181 (Magma-Build Acid Resistant) is a heat- and acid-resistant trowelable system for repair and protection of concrete, stone, and other rigid substrates subject to impact and abrasion. Engineered around an acid-catalysable hybrid resin system incorporating closely packed acid-resistant fillers, the three-component system combines Base, Solidifier, and red Aggregate to form a high-strength trowelable compound.
Designed primarily for horizontal surfaces, Belzona 4181 may be applied on vertical surfaces up to ¼ inch (6 mm) thickness. With outstanding adhesion, hardness, and inorganic acid resistance, plus heat distortion temperatures up to 420°F (216°C) after high-temperature post-cure, the product is ideally suited for the most demanding chemical and thermal environments in industrial floors, drains, and oven foundations.
Key Benefits
Exceptional compressive strength for load-bearing applications and demanding mechanical environments
Outstanding resistance to a wide range of chemicals
Outstanding performance under elevated temperature conditions including dry heat and steam exposure
No solvents, no shrinkage during cure
100% solids formulation reduces health and safety risks in confined spaces with no shrinkage on cure
Bonds strongly to virtually any rigid surface
Application Areas
What this product handles, grouped by equipment area — each links to the full application.
Floor Problem Areas
5 applications- Chemical containment area floorsChemical storage tank topsLearn more
- Concrete & stone repair/resurfacingHorizontal repair of concrete and stone substrates damaged by impact, abrasion, or acid attackLearn more
- Building floors, industrial surfacesIndustrial concrete floors fail at construction joints, equipment bases, and forklift wheel paths where impact and abrasion combine to spall the surface and expose rebar…Learn more
- Floors, walls, infrastructure coatingIndustrial concrete is the substrate everywhere a process plant pours product, drives forklift traffic, or contains a spill, and unprotected concrete takes acid, alkali,…Learn more
- High-temperature floor protectionOven floors and foundations exposed to elevated temperaturesLearn more
Buildings & Structural Steel
1 applicationTanks & Chemical Containment Areas
1 applicationTechnical Data
Composition
- Type
- Three-component (Base + Solidifier + Aggregate) acid-catalysable hybrid resin system with closely packed acid-resistant fillers
- Mixing Ratio by Weight (Base : Solidifier : Aggregate)
- 100 : 30 : 1000
Components
- Base
- Clear liquid, light amber, viscosity 40–50 poise at 77°F (25°C), density 1.17–1.19 g/cm³
- Solidifier
- Clear liquid, amber, viscosity 3–6 cPs at 77°F (25°C), density 1.05–1.07 g/cm³
- Aggregate
- Pre-wetted, fine granular powder, red color, density 2.5–2.7 g/cm³
Application
- Working Life
- 30 minutes at 77°F (25°C) — varies with temperature
- Coverage Rate
- 10.67 sq.ft. (1.05 m²) at ¼ inch (6 mm) per 15 kg unit
- Volume Capacity
- 384 cu.in. (6,300 cm³) per 15 kg unit
- Vertical Surface Limit
- ¼ inch (6 mm) max thickness
Compressive Properties (ASTM D695, 7-day cure)
68°F/20°C cure & test
- Compressive Strength
- 5,932–6,391 psi (40.9–44.1 MPa)
- Young's Modulus
- 1.74 × 10⁵ psi (1,202.3 MPa)
- Heavily Compacted Compressive Strength
- 9,685–10,403 psi (66.8–71.7 MPa)
- Heavily Compacted Modulus
- 2.15 × 10⁵ psi (1,484.7 MPa)
212°F/100°C cure & 68°F/20°C test
- Compressive Strength
- 15,262–15,940 psi (105.2–109.9 MPa)
- Young's Modulus
- 2.76 × 10⁵ psi (1,900.4 MPa)
- Heavily Compacted Compressive Strength
- 23,863–24,002 psi (164.5–165.5 MPa)
- Heavily Compacted Modulus
- 3.22 × 10⁵ psi (2,220.8 MPa)
Flexural Properties
- Flexural Strength (ASTM D790, binder/aggregate matrix)
- 6,444 psi (44.4 MPa)
Adhesion
- Tensile Shear, polymeric binder to steel (ASTM D1002)
- 2,400 psi (16.5 MPa)
- Elcometer Pull-off, dry concrete
- 600 psi (4.14 MPa)*
- * Cohesive failure of substrate — bond exceeds substrate strength
Abrasion Resistance
- Taber (ASTM D4060, H10 wet, 1 kg load, per 1,000 cycles)
- 395 mm³
Impact Resistance (Izod Pendulum, ASTM D256)
68°F/20°C cure & test
- Reversed Notched
- 1.3 KJ/m² (13.5 J/m)
- Un-Notched
- 1.7 KJ/m² (17.1 J/m)
212°F/100°C cure & 68°F/20°C test
- Reversed Notched
- 1.8 KJ/m² (22.6 J/m)
- Un-Notched
- 2.0 KJ/m² (25.4 J/m)
Heat Distortion Temperature (ASTM D648)
- Ambient cure
- 129°F (54°C)
- Post-cure at 100°C
- 365°F (186°C)
- Post-cure at 150°C
- 420°F (216°C)
- Service
- Suitable up to 300°F (150°C) for impact/abrasion applications. Not recommended for chemical immersion at elevated temperatures.
Chemical Analysis (independently analyzed)
- Fluoride
- ND (<10 ppm)
- Chloride
- 15 ppm
- Bromide
- ND (<10 ppm)
- Sulfur
- 3 ppm
- Nitrite
- ND (<8 ppm)
- Nitrate
- ND (<8 ppm)
- Tin
- 10.4 ppm
- Arsenic
- 8 ppm
- Antimony, Bismuth, Cadmium, Lead, Zinc, Silver, Mercury, Gallium, Indium
- ND (<3.0 ppm)
- ND = Not Detected at the indicated detection limit
Chemical Resistance
- Good resistance to a broad range of chemicals, particularly inorganic acids
- Refer to Chemical Resistance chart for detailed compatibility information
Shelf Life
- Separate Base and Solidifier components have a 5-year shelf life from date of manufacture in original unopened containers stored between 32°F (0°C) and 86°F (30°C)
Working Life
From commencement of mixing, use within:
- 59°F (15°C)
- 45 minutes
- 68°F (20°C)
- 35 minutes
- 77°F (25°C)
- 30 minutes
Curing Time
For ¼ in. (6 mm) film thickness — reduced for thicker sections
At 59°F (15°C)
- Resist pedestrian traffic
- 12 hours
- Machine hard
- 16 hours
- Full mechanical hardness
- 48 hours
- Full chemical resistance
- 10 days
At 77°F (25°C)
- Resist pedestrian traffic
- 8 hours
- Machine hard
- 12 hours
- Full mechanical hardness
- 24 hours
- Full chemical resistance
- 5 days
Service Temperature Limits
- Service Temperature (typical applications)
- Up to 300°F (150°C) for impact and abrasion service
- HDT (ambient cure)
- 129°F (54°C)
- HDT (100°C post-cure)
- 365°F (186°C)
- HDT (150°C post-cure)
- 420°F (216°C)
- Important
- Not recommended for chemical immersion at elevated temperatures
- Storage Temperature
- 32°F (0°C) to 86°F (30°C) in unopened containers
Product PDFs
Gallery
Frequently Asked Questions
What is Belzona 4181 (AHR Magma-Quartz) used for?
Belzona 4181 (AHR Magma-Quartz) is a 3-part acid- and heat-resistant epoxy repair mortar specifically designed for the long-term protection of concrete and stonework subjected to severe chemical attack and elevated service temperatures. It is ideal for chemical bunds, secondary containment, and process areas exposed to acids.
What is the mixing ratio of Belzona 4181 (AHR Magma-Quartz)?
The mixing ratio of Belzona 4181 (AHR Magma-Quartz) is 100 : 30 : 10 (Base : Solidifier : Conditioner) by weight, with Belzona 4181 Aggregate added to achieve mortar consistency. Please see the Product Specification Sheet (PSS) for more information.
How do you apply Belzona 4181 (AHR Magma-Quartz)?
To apply Belzona 4181 (AHR Magma-Quartz), the surface must be clean, firm, dry, and free of any paint, tar, and other contaminants. Condition the surface using the supplied Belzona 4181 Conditioner. Mix the Base, Solidifier, and Conditioner thoroughly to achieve a homogeneous resin, then slowly add the Belzona 4181 Aggregate until mortar consistency is achieved. Within 30 minutes at 77°F (25°C), apply onto the conditioned surface using a trowel and tap down firmly to compact and remove entrapped air. Please see the Instructions for Use (IFU) for more information.
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