Opus

WALL & FLOOR SYSTEM BOTH

Opus coating system delivering a refined stone texture with exceptional durability for interior and exterior walls. Trowel-applied silicone acrylic emulsion with sintered coloured sand — 72+ wall colours and 12 floor colours, 10-20 year rated lifespan.

TechStone Opus is a premium crystal diamond sand coating composed of silicone acrylic emulsion blended with sintered coloured sand and advanced additives. The system produces a refined stone-like texture with visual depth that elevates facade and interior wall surfaces beyond conventional paint or render finishes.

The four-layer system — Primer, Base Coat, Main Coat, and Top Coat — is applied using roller for the primer and base layers, then stainless steel batch knife or trowel for the main coat at 2.5 to 3.5 kg/m2. The main coat is applied at a 45-degree angle, allowed to dry, then scraped flat with the batch knife to produce a smooth, crystalline surface. Two coats of the main material build a total thickness of 1.5 to 2.0 mm. The protective top coat provides UV resistance, self-cleaning properties, and a waterproof seal.

Opus accommodates design joints — scored lines filled with accent colour and protected with masking tape during main coat application — enabling panel patterns, block coursing, or bespoke geometric layouts on large facade areas.

The system is rated for both interior and exterior use with a 10 to 20 year service life. It is crack-resistant and flexible, withstands UV exposure without fading, and offers self-cleaning and mildew-resistant properties. Compatible substrates include cement, putty, concrete, glass, aluminium, steel, and wood. The water-based formulation is low-VOC and low-formaldehyde, meeting environmental and indoor air quality requirements for commercial and residential specification.

Available in 72+ wall colours and 12 dedicated floor colours, Opus is supplied in 5 kg and 20 kg buckets. Exterior installations require topcoat reapplication every 3 to 5 years.

System Highlights

10-20 year lifespan Crack resistant and flexible UV resistant Self-cleaning Mildew resistant Water-based, low VOC 72+ wall colours, 12 floor colours Design joint capable Interior and exterior rated Trowel / batch knife application

System Specifications

Density	1.7 - 1.8 g/cm3
CSI Spec	09 96 00 / 09 96 08
Full Cure	7 days at 25C
Packaging	5 kg and 20 kg buckets
Maintenance	Reapply topcoat every 3-5 years (exterior)
VOC Content	Low VOC (water-based)
System Build	Primer -> Base Coat (x2) -> Main Coat (x2) -> Top Coat (x2)
Dry to Recoat	Primer 2-3 hrs, Base 4-6 hrs, Main 12-24 hrs, Top 4-6 hrs
Exterior Rated	Yes
Total Coverage	3.0 - 4.0 kg/m2 (all layers)
Application Temp	5 - 40C (optimal 15-30C)
Coverage - Primer	0.125 kg/m2 (1 coat)
Expected Lifespan	10-20 years
Application Method	Roller (primer/base/top), trowel or batch knife (main coat)
Coverage - Top Coat	0.125 kg/m2 (2 coats)
Main Coat Thickness	1.5 - 2.0 mm
Suitable Substrates	Cement, putty, concrete, glass, aluminium, steel, wood
Coverage - Base Coat	0.25 kg/m2 (2 coats)
Coverage - Main Coat	2.5 - 3.5 kg/m2 (2 coats)

Gallery

Common Questions

What substrates can Opus be applied to? +

Opus is compatible with cement, putty, concrete, glass, aluminium, steel, and wood substrates. The surface must be skim coated, dry, and even with moisture content below 10% and pH below 10. All cracks and holes must be filled with anti-crack mortar and smoothed before priming.

How is the Opus texture created? +

The main coat is applied using a stainless steel batch knife or trowel held at a 45-degree angle, building a thickness of 1.5 to 2.0 mm. After drying (8-12 hours), the surface is scraped flat with the batch knife to produce a refined crystalline stone texture. A second main coat is then applied using the same technique.

What is the full Opus system build-up? +

Opus is a four-layer system: Primer (1 coat, roller/spray, 0.125 kg/m2), Base Coat (2 coats, roller, 0.25 kg/m2), Main Coat (2 coats, trowel/batch knife, 2.5-3.5 kg/m2), and Top Coat (2 coats, roller, 0.125 kg/m2). Total material consumption is approximately 3.0 to 4.0 kg/m2.

Can design joints be incorporated into the Opus finish? +

Yes. Before applying the main coat, design joints are drafted on the base coat surface and filled with the chosen accent colour. Masking tape protects the joint lines during main coat application. After the main coat dries, the tape is removed to reveal clean joint lines. This enables panel patterns, block coursing, or bespoke geometric layouts.

What is the expected lifespan and maintenance cycle? +

Opus is rated for a 10 to 20 year service life under normal conditions. The self-cleaning top coat requires minimal maintenance — routine cleaning with water or mild detergent as needed. For exterior installations, the protective topcoat should be reapplied every 3 to 5 years. Annual visual inspection is recommended.

STEP 1

Surface Preparation — Ensure wall is skim coated, dry, and even. Moisture content must be below 10%, pH below 10. Fill all cracks and holes with anti-crack mortar and smooth. Surface must be firm and free from sand, dust, rust, and oil.

STEP 2

Apply Primer — 1 coat by roller or spray at 0.125 kg/m2. Use a short-nap roller without dead angles for even coverage. The primer seals the substrate and provides the adhesion layer. Allow 2-3 hours to dry before proceeding.

STEP 3

Apply Base Coat — 2 coats by roller at 0.25 kg/m2. Allow 4-6 hours drying between coats. The base coat provides colour foundation and surface levelling. Do not proceed to main coat until fully dry.

STEP 4 (OPTIONAL)

Design Joint — Draft lines for desired design joint pattern on the base coat. Fill the scored line with chosen accent colour paint. Apply UV-resistant masking tape to protect design joints during main coat application.

STEP 5

Apply First Main Coat — Using a stainless steel batch knife or trowel held at 45 degrees, apply crystal diamond sand coating at 2.5-3.5 kg/m2. Work in manageable sections with consistent pressure. Maintain even thickness of 1.5-2.0 mm throughout.

STEP 6

Scrape and Flatten — Allow the first main coat to dry 8-12 hours. Using the batch knife held flat against the surface, scrape and flatten any high spots in smooth overlapping strokes. This produces the refined crystalline texture.

STEP 7

Apply Second Main Coat — After scraping, apply the second coat using the same 45-degree technique. Allow 12-24 hours to hard dry. Remove masking tape gently to reveal clean design joints if applied.

STEP 8

Apply Top Coat — 2 coats of water-repellent clear coat by roller at 0.125 kg/m2. Allow 4-6 hours between coats. The top coat provides UV protection, self-cleaning properties, and a waterproof seal for long-term durability.

CSI Spec	09 96 00 / 09 96 08
System Build	Primer → Base Coat (×2) → Main Coat (×2) → Top Coat (×2)
Application Method	Roller (primer/base/top), trowel or batch knife (main coat)
Main Coat Thickness	1.5 – 2.0 mm
Coverage — Primer	0.125 kg/m² (1 coat)
Coverage — Base Coat	0.25 kg/m² (2 coats)
Coverage — Main Coat	2.5 – 3.5 kg/m² (2 coats)
Coverage — Top Coat	0.125 kg/m² (2 coats)
Total Coverage	3.0 – 4.0 kg/m² (all layers)
Full Cure	7 days at 25°C
Dry to Recoat	Primer 2–3 hrs, Base 4–6 hrs, Main 12–24 hrs, Top 4–6 hrs
Application Temp	5 – 40°C (optimal 15–30°C)
Density	1.7 – 1.8 g/cm³
VOC Content	Low VOC (water-based)
Exterior Rated	Yes
Suitable Substrates	Cement, putty, concrete, glass, aluminium, steel, wood
Packaging	5 kg and 20 kg buckets
Expected Lifespan	10 – 20 years
Maintenance	Reapply topcoat every 3–5 years (exterior)

Common Questions

What substrates can Opus be applied to? +

How is the Opus texture created? +

What is the full Opus system build-up? +

Can design joints be incorporated into the Opus finish? +

What is the expected lifespan and maintenance cycle? +

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At a Glance

CSI Spec	09 96 00 / 09 96 08
System Build	Primer → Base Coat (×2) → Main Coat (×2) → Top Coat (×2)
Application Method	Roller (primer/base/top), trowel or batch knife (main coat)
Main Coat Thickness	1.5 – 2.0 mm