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Jesmonite® AC730 composite is an acrylic polymer-modified cementitious system, designed for smooth or textured finishes with a natural stone look.
Versatile, it is suitable for both casting decorative objects and creating glass-reinforced decorative elements. Jesmonite® AC730 bases are pre-tinted to ensure long-lasting color consistency. They are available in eight shades inspired by natural stone: Portland, Natural, Bathstone, Yellow Stone, White Marble, Silver Grey Granite, Terracotta, and Charcoal.
Jesmonite® AC730 is a fast-setting mineral composite material, formulated from an acrylic polymer-modified cement base.
It reproduces the authentic look of natural stone while offering a lightweight, high-performance, and durable alternative to traditional concrete.
Formulated without alkalis, it limits efflorescence, features low alkalinity, and, after surface treatment, low permeability, ensuring long-lasting color stability.
Distributed by Finres, this product is part of a complete service and is compatible with other ranges, such as Jesmonite AC100 and Jesmonite AC84 resins, depending on finishing or mechanical performance needs.
Decorative molded objects: trays, candle containers, vases, bowls, tableware, coasters
Furniture
Sculptures
Statues and garden ornaments
Facade elements and decorative cladding
Jesmonite® AC730 is perfectly suited for thin structures reinforced with quadaxial glass fiber, allowing for the creation of:
Architectural panels
Wall coverings
Lightweight self-supporting structures
Large-scale elements with reduced weight
Quantities and coverage
Solid casting: 2,000 g / litre
Lamination: 2 kg / m² / mm thickness
Mix ratio
Liquid: 1
Powder: 5
Example: 100 g liquid to 500 g powder
Mix
Gradually pour the powder into the liquid
Mix with a flat spatula or the Jesmonite High Shear mixer at low speed, then increase to ≈ 1,000 rpm
Final mixing time: 30 to 45 seconds
Setting time: 20–25 minutes
Warning: do not use a blender or whisk
1 Casting into a mold
Apply a first coat with a brush to all surfaces to be covered
Finish filling the mold with the remaining Jesmonite
Gently tap the sides of the mold to help release air bubbles
2 Lamination with quadaxial fiber
Apply a Jesmonite gelcoat (1 to 2 mm)
Lamination in successive layers
Recommended final thickness: 5 to 6 mm
Average final weight: ≈ 12 kg/m²
Demolding and curing
Demolding: approximately 2 hours after casting
Drying time
Over 90% of mechanical performance achieved within 24 hours
Store in a warm, dry, and ventilated area
Keep flat to prevent warping
Etching to achieve the stone effect finish
Etch after at least 24 hours
Hydrochloric acid: 1 to 4 minutes depending on the desired effect OR white vinegar (immersion ≥ 1 hour)
Rinse thoroughly with clean water immediately after etching
Protection and waterproofing
Jesmonite® AC730 is not waterproof.
Make sure to choose the right sealer based on your application.
To calculate the quantities and proportions of Jesmonite you’ll need, first select the relevant range. Then specify whether you’re calculating based on a mold or a cast piece. If calculating based on a mold, place it on a scale, fill it with water, and enter the amount into the calculator. If calculating based on a cast piece, weigh the piece and enter the information into the calculator. This will give you the quantity of liquid and powder needed to make your part.
Enter a value to start the calculation.
Retarder to increase working time
Thixotrope (thickener) to adjust the mix viscosity
Flexiguard Sealer is an effective natural repellent for contact with moisture
Penetrating Sealer provides long-lasting protection for AC730/AC84 against stains, water, and dust
Colortec (matte sealer) for a waterproof matte finish
Colorfresh (gloss sealer) is applied to a dry surface to provide a waterproof gloss finish to Jesmonite AC100/AC730/AC84 composites.
Quadriaxial fiber (reinforcement) is a glass fabric used in laminating processes to produce panels.
PVA (reinforcing) fibers are synthetic polyvinyl alcohol fibers particularly well-suited to cement-based materials.
6 mm chopped fibers provide increased strength to thin-section castings. A shorter length allows better dispersion in the mixture.
12 mm chopped fibers provide increased strength to thin-section castings. Longer lengths offer greater tensile strength.
