

AC830
Designed for Extreme Conditions
Jesmonite AC830 is an acrylic polymer modified cementitious casting composite. It is a shrinkage-compensated material of low absorbency and is durable in all conditions of weathering. The compound is designed for fine decorative castings and is suitable for statuary, water-features, and decorative cast objects that are durable and frost resistant.
Product Information
ABOUT AC830
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Very high durability in all conditions of external weathering including water features, statuary, cast stone decorative building elements etc.
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Can be custom matched to a wide range of bespoke building colours using the appropriate UV stable oxide pigments.
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Self-leveling technology negates the need for vibration equipment for air free castings, simply brush the material onto the mould and pour.
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Compatible with a wide range of fibre reinforcements such as PVA Fibres and Polypropylene Fibres to enhance durability.
FUNCTIONALITY OF AC830
Scalability & Fixing
​AC830 is suitable for larger scale architectural applications and detailed panelised formats including external decorative features. Jesmonite cladding panels can be fixed to most substrates in a fashion akin to conventional GRC or concrete systems.
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For full design advice, engineering assistance and project / specification support – please contact our Jesmonite Architectural Solutions team. ​

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We are members of the International Glassfibre Reinforced Concrete Association
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Made from Jesmonite CPD’s are available upon request.

HOW ITS SUPPLIED
Design Flexibilty
AC830 is a bulk purchase material designed as a thicker, solid-casting alternative to AC730. It has a slower total set time but has the inherent ability to be cast in solid sections where other Jesmonite products, namely AC730, may be unsuitable.
Examples of applications where AC830 can be used are:
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Water Features
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Cast-Stone Imitation Finishes
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External & Internal
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Solid Cast Features
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Basins/Sinks
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Bathtubs
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Brickslips
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Wall & Floor Tiles
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Sculptural/Artistic Works
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and more...
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AC830 EXTRAS
AC830 Options
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Extra Strength
AC830 can be combined with Jesmonite AR Quadaxial Glass, PVA Fibres or AR Chopped Strands to achieve a higher level of impact resistance and overall strength for certain applications.

Flexigaurd Sealer
AC830 can be sealed using Jesmonite Flexiguard or Penetrating Sealer (dependent on application) to create a water and stain-resistant piece, for scaled applications AC830 can be combined with AC830 Spray Liquid to allow the product to be utilised with a spray gun, therefore speeding up the prospective application.
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Bespoke Colour
Our bespoke colour-matching service is available for this product, which utilises our industry-leading colour-matching team who can analyse the pigmentation of many objects/surfaces and provide a custom blended AC830 base for your use.
*MOQ 500kg.
HOW ITS SUPPLIED

All variations of Jesmonite can be supplied in:
Supplied how you
need it
Buckets up to 25kg
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Single Bags at 25kg
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Bulk Bags up to 1000kg
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Pallets with Bags up to 1000kg
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Shipping Containers up to 26'000kg

DESIGNED FOR EASE OF USE
Manufacturing Methods
🔹 Traditional Pouring Methods
The classic approach! Traditional pouring is ideal for creating detailed casts and solid forms. Jesmonite's smooth consistency allows it to capture intricate details, making it perfect for sculptures, ornamental pieces, and architectural elements. Simply mix, pour into your mould, and let the material do the rest.
🔹 Spray Moulding
Looking to cover large surfaces or achieve a lightweight finish? Spray moulding is your answer. By spraying Jesmonite onto a mould or substrate, you can build up thin layers that are strong yet lightweight. This method is excellent for creating panels, facades, and decorative surfaces with minimal weight addition.
🔹 Trowelling
For those who love a hands-on approach, trowelling Jesmonite offers a tactile experience with creative freedom. This method allows you to apply the material directly onto surfaces, giving you control over texture and thickness. It's perfect for custom finishes, restorative work, or adding unique textures to walls and installations.
🔹 Rotational Moulding (Rota Moulding)
Also known as roto moulding, this technique is fantastic for creating hollow, seamless objects. By rotating a mould while the Jesmonite cures inside, you achieve uniform wall thickness and structural integrity. This method is ideal for producing items like planters, furniture pieces, and complex geometric forms.
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WHAT WE DO
Innovative Formulations
High Impact Strength
Ultra-Low Shrinkage
Extreme Weather Resistance
Superior Tensile & Compression Performance
A1 Fire Rated
Customisable Finishes & Colour​
Hybrid GRC Formulation
Jesmonite is a hybrid Glass Reinforced Concrete (GRC) for use in complex architectural projects.
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Haven't Found What You
Are Looking For?
Select a different product below
or contact us for bespoke options
Features
AC100
AC300
AC630
AC730
AC830
AC930
Flex Metals
Designed for Interior Application
Designed for Exterior Application
Fire Rating
​EN13501-1
B-s1-d0
ASTM E84
Class 1 (A)
B-s1-d0
Class 1 (A)
A2-s1-d0
NA
A2-s1-d0
Class 1 (A)
A1
NA
NA
N
NA
NA
Glass Reinforceable
Initial Set Time (18°C, No Retarder)
15 – 20 Minutes
15 – 20 Minutes
4 hours+
4 hours+
4 hours+
2 hours+
4 hours+
Solvent Free
Food Safety Tested
Mix Ratio (Powder to Liquid)
2.5:1
2.5:1
5:1
5:1
7:1
5:1 – 6:1
5.5:1
Applications

Achieve bold, durable exteriors with Jesmonite’s materials, which offer strength and versatility for creating facades and cladding that withstand environmental stresses.

Create custom architectural details, from cornices and columns to panels and feature walls, with Jesmonite’s adaptable material options.

Jesmonite’s fire-resistant materials meet strict safety standards, ideal for creating safe, compliant environments in public buildings and commercial spaces.
Where Reliability
Meets Innovation
With Jesmonite, manufacturers gain access to materials that not only deliver superior performance but also align with sustainable practices. From intricate details to large structural applications, our products ensure quality, consistency, and innovative possibilities in every project.