Modern construction and interior design continuously demand innovative materials that combine aesthetics, durability, and ease of application. Two such products from Living Concrete Ltd — FluidConcrete and Oxicrete — represent distinct approaches to cement-based surface finishing. FluidConcrete is a thin self-leveling cementitious floor coating, while Oxicrete is an acid-based patination system that transforms the appearance of existing cement surfaces. Together, they offer architects, contractors, and homeowners versatile options for both new installations and renovations. This article examines the composition, application methods, performance characteristics, and ideal use cases for each system, providing a practical reference for construction professionals. For a broader look at how these materials fit into the category of living concrete technologies, this article connects them to the wider movement toward breathable, aesthetically driven cementitious finishes.
What Is FluidConcrete and How Does It Work?
FluidConcrete is a 2 to 3 millimeter thick self-leveling indoor cement-based floor coating developed by Living Concrete Ltd. It is designed to be applied over virtually any existing hard surface, including ceramic tiles, existing concrete slabs, stone floors, and properly prepared timber subfloors. The material arrives as a dry powder that is mixed with water on site to produce a highly flowable, pourable slurry. Once poured, it spreads under its own weight to form a perfectly level, seamless surface without the need for extensive troweling or mechanical leveling.
The formulation relies on a blend of fine cement, carefully graded aggregates, and advanced polymer modifiers. These polymers serve multiple functions: they improve the flow characteristics of the wet mix, enhance adhesion to the substrate, and increase the flexibility of the cured coating. Unlike traditional cement screeds that may crack under minor movement, the polymer-modified matrix of FluidConcrete accommodates normal thermal expansion and minor substrate deflection. The result is a durable, dimensionally stable floor finish that can support foot traffic within 24 hours and full service loading after 72 hours, depending on ambient conditions.
Application Process and Surface Preparation for FluidConcrete
Successful application of FluidConcrete depends heavily on proper surface preparation and correct mixing procedures. The substrate must be clean, sound, and free from dust, grease, curing compounds, or any contaminants that could compromise bond strength. Existing tiles or smooth concrete surfaces typically require light mechanical abrasion or the application of a primer supplied by the manufacturer. The primer seals porous substrates and creates a tacky surface that mechanically locks the FluidConcrete layer in place.
Mixing follows a strict protocol:
- Measure the exact quantity of clean water specified in the technical data sheet into a clean mixing bucket.
- Add the dry powder gradually while mixing with a low-speed drill and paddle to prevent lump formation.
- Mix for two to three minutes until a homogenous, lump-free slurry with a creamy consistency is achieved.
- Allow the mix to rest for one to two minutes to de-aerate, then give a final brief stir before pouring.
The mixed material is poured onto the prepared floor and spread using a smooth steel trowel or a spiked roller. The spiked roller is especially important as it releases trapped air bubbles and promotes uniform thickness. Application thickness is critical: at the recommended 2 to 3 millimeters, the coating cures evenly without delamination. Thicker applications may require multiple passes with adequate drying time between layers. For more information on decorative concrete applications, the guide on colorful concrete tiles for decorative concrete floor and wall applications provides additional insight into design possibilities with cementitious materials.
Understanding Oxicrete and the Patination Process
Oxicrete is an acid-based patination system manufactured by Living Concrete Ltd, designed to chemically alter the surface appearance of cementitious materials. Unlike FluidConcrete, which creates a new surface layer, Oxicrete transforms the existing surface through a controlled chemical reaction. The system consists of a bicomponent formulation: a liquid subbase that prepares the surface and an acid-activator that produces the characteristic color change. When applied to cement surfaces, the acid reacts with calcium hydroxide and other minerals in the cement matrix to produce iron oxide and other metallic compounds, resulting in colors ranging from warm rust tones to deep stone-like greys and browns.
The technique is commonly referred to as acid staining or chemical patination. It is particularly valued for producing variegated, non-repetitive finishes that mimic natural stone or aged metal surfaces. Each application yields a unique result because the final color depends on the specific mineral composition of the substrate, the porosity of the surface, the ambient temperature, and the manner in which the acid solution is applied. The relationship between concrete strength, porosity, and cement composition directly influences how deeply the acid penetrates and how intense the final coloration becomes. Concrete strength, concrete porosity, and concrete cement properties all affect the outcome of chemical treatments like Oxicrete, making substrate assessment an essential pre-application step.
Substrates Compatible with Oxicrete Treatment
Oxicrete is formulated to work on a wide range of cement-based substrates. The product data indicates compatibility with:
- MicroCement and MicroConcrete surfaces
- ThinCrete overlays
- Smoothed concrete floors and walls
- Polymer-modified screeds
- Cured concrete dam structures
- Fully cured mortar beds
Each substrate type responds differently to the acid treatment. For example, denser, low-porosity concrete will yield lighter, more subtle color variations, while more porous cement mortars absorb more acid solution and produce deeper, richer tones. Surface preparation for Oxicrete is less intensive than for FluidConcrete, but the substrate must be fully cured, clean, and free from sealers, waxes, or coatings that would block acid penetration. A simple water absorption test — sprinkling water on the surface and observing how quickly it absorbs — helps determine whether the substrate is adequately receptive. For projects involving the consolidation of concrete in congested reinforced concrete members, proper surface preparation ensures that subsequent treatments like Oxicrete achieve uniform coverage.
| Property | FluidConcrete | Oxicrete |
|---|---|---|
| Primary function | Self-leveling floor coating | Acid-based patination system |
| Application thickness | 2–3 mm | Surface penetration only |
| Substrate requirement | Any hard, clean surface | Cement-based surfaces only |
| Curing time | 24–72 hours | 1–24 hours depending on temperature |
| Finish type | New surface layer | Chemical transformation of existing surface |
| Color variability | Consistent across batch | Unique, variegated per application |
| Indoor / outdoor | Indoor | Indoor and outdoor |
Performance Characteristics and Durability Considerations
Both FluidConcrete and Oxicrete deliver durable finishes when applied correctly, but their performance profiles differ significantly. FluidConcrete forms a hard, abrasion-resistant surface that withstands moderate foot traffic, light wheeled loads, and regular cleaning with neutral pH detergents. It is suitable for residential interiors, retail spaces, showrooms, and commercial offices. However, because the coating is only 2 to 3 millimeters thick, it is not designed for heavy industrial traffic or areas subjected to point loads from machinery or pallet jacks. In such cases, a thicker structural screed or epoxy system would be more appropriate.
Oxicrete, being a penetrating treatment rather than a coating, does not add thickness to the surface. Its durability is therefore tied directly to the underlying substrate. The chemical reaction creates color that is integral to the surface, meaning it will not peel, chip, or delaminate like a paint or topical coating. This makes Oxicrete an excellent choice for exterior applications such as patios, walkways, and architectural concrete features where UV exposure would degrade conventional coatings. Over time, the patinated surface may weather naturally, gaining character rather than degrading. Sealing the treated surface with a penetrating sealer enhances stain resistance and simplifies maintenance. When working with existing concrete that requires renewal, understanding how to pour new concrete over an old concrete surface can also inform decisions about substrate preparation for subsequent treatments.
Selecting Between FluidConcrete and Oxicrete for Your Project
The choice between FluidConcrete and Oxicrete depends on the project objectives. FluidConcrete is the right solution when the goal is to create a new, smooth, uniform floor surface over an existing substrate that is structurally sound but cosmetically dated. It is particularly effective in renovation projects where removing the existing floor would be disruptive or expensive. The self-leveling property ensures a flat result even on uneven substrates, reducing the skill level required for installation compared to traditional screeding.
Oxicrete, by contrast, is chosen when the existing cement surface is in good condition but aesthetically uninteresting. Rather than covering the surface, it enhances it, revealing texture and character that were always present in the cement matrix. It is popular in restaurants, retail boutiques, hotel lobbies, and residential spaces that seek an industrial-chic or rustic aesthetic. The unpredictability of the color result is often considered an advantage, as each floor becomes a unique artwork. However, this same unpredictability means that samples and mock-ups are strongly recommended before committing to a full installation. A comprehensive post-concrete inspection and testing approach for concrete buildings can help assess whether the existing surface is suitable for chemical patination and what results can be expected.
Cost is another differentiating factor. FluidConcrete requires the purchase of the coating material, primer, and any necessary repair compounds, plus labor for mixing and application. Oxicrete is generally less expensive in material cost but requires skilled application to achieve uniform coverage and prevent etch marks or uneven coloration. In both cases, investing in proper surface preparation yields the best long-term value. For structural applications demanding high load capacity, the detailed analysis of prestressed concrete over reinforced concrete and arch systems provides a useful comparison of engineered concrete solutions for structural members.
Conclusion
FluidConcrete and Oxicrete from Living Concrete Ltd represent two distinct but complementary approaches to modern cementitious surface finishing. FluidConcrete offers a reliable, repeatable method for creating thin, self-leveling floor coatings that transform worn or uneven substrates into smooth, attractive surfaces. Oxicrete provides a chemical patination technique that brings out the natural beauty of cement through controlled acid reactions, producing unique, durable finishes that improve with age. Understanding the properties, application requirements, and performance characteristics of each system allows construction professionals and specifiers to select the appropriate solution for their specific project conditions. Whether creating new floors or revitalizing existing concrete, these materials expand the palette of possibilities for contemporary building design.