Bagged finish
Stonecoat
Hand-tooled to the look of cut stone, complete with grout lines — or given the look of a more rustic field stone.
A field-applied limestone coating: a proprietary blend built on quarried, crushed limestone — made out of stone.
It can be textured, honed and finished like cut stone, or given the look of a more rustic field stone. The range is virtually limitless — from elegant and authentic, to modern and organic.
Integrally colored with powdered mineral-oxide pigments. Manufactured in the United States; installed by trained applicators.
- Made out of
- Crushed limestone · proprietary blend
- Compressive strength
- 5,800 PSITested at 5,805 psi at 28 days, ASTM C-109 — see the test results.
- Nominal thickness
- 3/16″ – 3/8″
- Coverage
- 15 sq ft per 50-lb bag at 3/8″
- Standard colors
- 12
Features and benefits
- Not a faux finish — authentic limestone, made out of stone
- No fastening — it adheres to almost anything
- Sustainable qualities good for LEED ratings
- Resists UV light degradation and fading
- Safe in place: no outgassing or chemical hazards
- Compressive strength exceeds concrete
- Lasts decades, with no foreseeable maintenance — sealed as set out below
- Hone it or polish it for a natural stone finish
- A cost-effective alternative to cut stone
- Complements the Arcusstone lime and cement plasters
Every guarantee covers the full Arcusstone system — primer, finish and sealer together.
Where it goes
- Suitable for
- Interior, exterior, vertical and horizontal applications; wet locations such as shower surrounds; water features such as fountains.
- Uses
- A decorative coating that replicates the look of quarried stone or other stone-like finishes · coating EPS foam shapes and panels · cast elements made in EPS, rubber or other molds · poured-in-place or cast countertops
- Elements
- Countertops, fireplaces, door and window surrounds, custom columns, arches, quoins, flooring, wainscoting, range hoods, pool copings, fountains, and interior or exterior wall surfaces — on luxury residences, resorts and commercial projects.
- Substrates
- Portland cement, cement plaster (stucco), gypsum board, poured-in-place concrete, CMU blocks, brick masonry, cement backer boards, lightweight concrete, ceramic or natural stone tile, and EPS foam.
- EPS foam shapes
- Stonecoat is the finish covered by the EPS foam-shapes specification — extruded, poured-mold and encapsulated units, and full cast panels and shapes — with a minimum 3/8″ of Stonecoat on all finished, exposed surfaces.
- Horizontal work
- Stonecoat goes on horizontal surfaces and is sealed there.
Where it does not go
Do not apply Stonecoat to:
- Unstable or unapproved substrates such as asphalt.
- Directly over elastomeric or acrylic EIFS type finish coats.
- Directly on wood, GFRC, PVC, ABS, urethane or other plastics.
- Sheet metal or other metal or steel — metal lath, grounds and reglets are acceptable for direct contact.
Never apply an Arcusstone coating over any type of EIFS finish coat, including acrylic, elastomeric and urethane.
Bonding Agent
Do not use Bonding Agent for Stonecoat over concrete on grade, retaining walls, or horizontal wet-location applications where block-pattern joints are left without a backfill of material in the joints.
Colors
12 standard colors
- Natural
- French Cream 10
- Champagne 10
- Champagne 50
- Slate 30
- Moss 30
- Taupe 50
- Sienna 60
- Terracotta 30
- French Grey 30
- Misty Taupe 10
- Misty Taupe 50
Every finish can be custom-colored to match virtually any color — Arcusstone matches chips from paint brands and other materials, arranged in conversation.
Because the materials are natural and the application is by hand, actual colors and textures may vary from any printed reproduction.
The look
Documents
- Stonecoat and Arcus Plaster brochurePDF · 328 KBOpen the PDF: Stonecoat and Arcus Plaster brochure
- Stonecoat product data sheetPDF · 145 KBOpen the PDF: Stonecoat product data sheet
- Stonecoat safety data sheetPDF · 170 KBOpen the PDF: Stonecoat safety data sheet
- Architectural specification — CSI 09 24 00, Portland Cement PlasteringPDF · 165 KBOpen the PDF: Architectural specification — CSI 09 24 00, Portland Cement Plastering
- Specification for pre-coated EPS foam shapes — CSI 06 60 00PDF · 174 KBOpen the PDF: Specification for pre-coated EPS foam shapes — CSI 06 60 00
Technical details
For specifiers and applicators. The product data sheet above carries all of it.
The numbers
- Nominal thickness
- 3/16″ – 3/8″
- Specified nominal
- 3/8 inch (9.5 mm)
- Coats
- Two coats to reach 3/8″: the first approximately 3/16″, the second to a total application thickness of 3/8″
- Coverage
- One 50-lb bag covers 15 sq ft at 3/8″
- Packaging
- 50-lb bag
- Weight
- One psf (4.88 kg/m²), average, for each 1/8 inch (3.2 mm) of thickness — ASTM C67
- Coated shapes
- Lightweight — 3 lb/sq ft at 3/8″
- Control joints
- Maximum area: exterior vertical and horizontal 6 ft² (0.56 m²) · interior vertical 25 ft² (2.3 m²) · interior horizontal 6 ft² (0.56 m²)Countertops may be installed without control joints when installed to the manufacturer's recommendations.
- Standard colors
- 12
| Property | Test method | 7 day | 28 day / result |
|---|---|---|---|
| Compressive strength, psi | ASTM C-109 | 4316 | 5805 |
| Flexural strength, psi | ASTM C-348 | 846 | 1043 |
| Tensile strength, psi | ASTM C-190 | 409 | 561 |
| Coefficient of friction (1) | ASTM C1028 | — | Dry 0.90 · Wet 0.87 |
| Freeze/thaw (2) | ICC-ES AC-11 Section 4.2 | — | Under 5X magnification, no indication of cracking, checking or crazing |
| Water resistance (3) | ASTM D870-02 | — | Slight color change; no blistering, crumbling or disintegration |
| Water vapor transmission (4) | ASTM E96-00 | — | 3 perms, at a rate of 19 grams/m²/24 hours |
| Non-combustibility (5) | ASTM E136-04 | — | Passed, no burning |
| Flame spread / developed smoke (6) | ASTM E84-07 | — | 0 flame, 0 developed smoke |
- (1) Rougher surfaces have higher values. Most dry materials in combination have friction coefficients between 0.3 and 0.6; zero would mean no friction; Teflon has a coefficient of 0.04; rubber can yield 1.0 to 2.0.
- (2) 10 freeze/thaw cycles, each of air drying at 120°F for 8 hours, total immersion in water at 70°F for 8 hours, then exposure to −20°F for 16 hours.
- (3) Specimens were partially immersed in 100°F water for 24 hours, and then observed.
- (4) Permeability is the rate at which water vapor passes through a material; permeance (perms) is how it is measured. The lower the number, the less vapor comes through.
- (5) Vertical tube furnace at 1382°F; the criteria include no flaming from the specimens after the first 30 seconds.
- (6) The test procedure is comparable to UL 723, ANSI/NFPA No. 255 and UBC No. 8-1.
Stonecoat's 5,800 PSI is its 28-day ASTM C-109 result of 5,805 psi, rounded.
Applying it
Climate
- Temperature
- Over 40°F (4.5°C) and rising, and less than 100°F (38°C).
- Substrate
- Do not apply to frozen or thawing substrates.
- Protection
- Use sun shades and wind screens during initial cure.
- Rain
- Do not apply if precipitation is expected within 48 hours, unless the work can be adequately protected.
Mixing
- 01Place 3.5 quarts (14 cups) of cool potable water in a clean 5 or 6-gallon plastic bucket.
- 02Add the pigment to the water, before any dry material.
- 03Blend in the dry material gradually with a low-speed mixing drill, adding small amounts of clean water to the desired consistency.
- 04Let the material set 15 minutes, then remix for 90 seconds before use.
Application
- 01Apply the first coat to approximately 3/16″ with moderate trowel pressure.
- 02Let it take up until firm enough not to leave a significant depression when pressed with fingertips.
- 03Apply the second coat with less trowel pressure, to a total application thickness of 3/8″.
- 04When the second coat has taken up like the first, the material is ready for finishing.
- Method
- Usually applied by trowel in a two-coat application; it can also be sprayed and back-trowelled.
- Bonding Agent
- The Bonding Agent is required for most Arcusstone material applications.
- Clean-up
- Clean tools and inadvertent applications immediately with water and a scrub brush, rinsing with clean water; once dry, mechanical means may be needed.
Sealing and maintenance
- Required
- A water-repellent penetrating sealer is required on exteriors in extreme climates — higher freeze/thaw cycles, higher and more constant UV exposure, higher altitudes, or higher humidity, subtropical and tropical locations.
- Also required
- In wet locations, water features, countertops, and all exterior horizontal applications.
- Top coat
- An additional commercial-grade top-coat sealer is strongly recommended for countertops, barbecue tops, bath, kitchen, garage floors, driveways, walkways, patios and other surfaces with heavier exposure to grease and staining.
- Recommended
- Sealing every other exterior application is strongly recommended but not required — against efflorescence in damp, rainy environments, UV fade, graffiti, caustic chemicals, and staining from acid rain, tree sap and bird or animal droppings.
- Sealer coverage
- 200 – 250 sq ft per gallon (4.9 – 6.1 m²/L)
- Before sealing
- New coating cures a minimum of 48 hours. The sealer goes on in two applications, wet on wet, for maximum penetration, protection and warranty.
- Color and texture
- Sealing does not alter the color or texture of the coating.
- Water features
- The Penetrating Water Repellent is not for pool surrounds or submersed work such as fountains.
- Warranty
- Arcusstone warrants every product to conform to its current published specifications at the time of shipment.
- The full system
- Every guarantee covers the full Arcusstone system — primer, finish and sealer together.
Storage and shelf life
- Store on pallets under cover, not exposed to weather.
- Do not stack more than 2 pallets high.
- Do not allow contact with liquids or precipitation.
- Store in a cool place out of direct sunlight, and rotate stock.
- Shelf life: 1 year in unopened bags from the stamped date of manufacture.
Arcusstone technical representatives and your regional distributor answer every question about the product and its use — design and detailing, job-site conditions, maintenance, restoration and repair, and LEED project certification.
Bring it to your project
Arcusstone is installed through local distributors.
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