Jesmonite AC300 Liquids, Powders and Kits

Jesmonite AC300 Liquids, Powders and Kits



Jesmonite AC300

Jesmonite AC300 is a water-based composite material used to make decorative moulded objects. It has a lower resin content then AC100 for cost sensitive applications where our AC100 may be over specified. It can be cast and laminated using our unique Quadaxial Glass.

Products benefits:

  • Superior cast and glass reinforced mouldings
  • Solvent free & no VOC’s
  • Fire resistant
  • Lightweight
  • Impact resistant


  • Easy to use, adaptable material for all moulding applications.
  • Suitable for decorative cast objects, mould cases, wall panels.
  • Supplied with a range of ancillary products including glass reinforcements, pigments, fillers, and control chemicals to adapt the material to the widest range of applications.
  • The ultimate chameleon material – can replicate virtually any surface, colour, or texture.

Available in:Pack sizes range from 1kg to 1,000kg bulk. See the product list for the full range of ancillary materials compatible with AC300.

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Jesmonite® AC300 is a water-based, two-component, acrylic polymer/mineral resin system. The system is suitable for a wide range of casting and laminating applications where the end user wants to reduce the many risks associated with conventional solvent based systems.

A range of ancillary products including decorative and functional fillers, control chemicals, pigments, and glass reinforcements are also provided making the material extremely versatile. The material is designed for internal use only.

The material is an economic alternative to Jesmonite AC100 where external durability is not essential.



Mix ratio 2.5:1 parts Base to Liquids ratio by weight

Wet density 1845 kg/m3

Dry density 1745 kg/m3

Initial set 15 – 20 minutes (18°C, No Retarder)

Expansion on set 0.15%



Compressive strength 30 – 35 Mpa

Tensile strength (UTS) 20 – 25 Mpa

Bending elastic limit (LOP) 15 – 20 Mpa

Bending strength (MOR) 50 – 65 Mpa

Youngs modulus 5 – 6 Mpa

Impact strength (Charpy) 30 KJ/m²

Moisture movement <1%

Fire resistance B.S.476 Part 6&7 – Class ‘O’

Freeze/Thaw resistance Excellent – Test specimens undamaged



Jesmonite AC300 is suitable for both cast and laminated decorative mouldings, and with the inclusion of suitable glass reinforcements can be utilised for lightweight, high-impact panels.

It also provides a Class 1 fire resistant surface coating for expanded foams for theme parks, theatre props, sculpture etc.

The material provides users with a water-based alternative to standard Glass Reinforced Polyester for rigid moulds and tooling.



Bulk supplied material to reduce costs and maximise transport efficiency.

General purpose material with a wide range of applications.



AC300 is supplied in kit form in two formats.

Small kits of 35kg and 70kg are available in plastic packaging.

AC300 is also supplied as Bulk kits of 420kg and 3,500kg.

Base in Bulk Kits is supplied in Valve Sacks.



As a basic rule liquid containers should be kept well sealed to prevent water evaporation and skin forming.

They should be stored at a constant temperature between 5 – 25oC and used within six months.

Freezing must be avoided. Base should be kept dry and stored at 5 – 25oC.


The above information and recommendations are based upon our experience and are offered merely for advice. They are offered in good faith but without guarantee, as conditions and methods of use are beyond our control. It is the responsibility of the end user to determine the suitability of the materials for the particular purpose intended.

Additional information

Weight 20 kg
Jesmonite AC300 liquids & kits

10Kg AC300 Liquid, 10Kg AC300 Liquid & 25Kg powder kit, 20Kg AC300 Liquid, 20Kg AC300 Liquid & 50Kg powder kit


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