Jesmonite AC100 Powder Base is the solid component of the popular Jesmonite AC100 acrylic composite system, designed for creating detailed decorative mouldings, glass reinforced laminates and a wide range of creative and construction projects. When combined with Jesmonite AC100 Liquid, it forms a strong, lightweight, eco-friendly material that captures fine detail and delivers a smooth, professional finish.
Formulated as a water-based, solvent-free composite, AC100 is a safer alternative to many traditional resin systems. It is widely used by artists, makers, prop builders and fabricators who require reliability, versatility and outstanding surface reproduction. Once mixed correctly, the material produces a durable yet lightweight composite suitable for both decorative and practical applications.
Mixing & Application:
Jesmonite AC100 is mixed by weight at a ratio of 2.5 parts Base Powder to 1 part AC100 Liquid. For best results, gradually add the powder to the liquid while stirring continuously to ensure a smooth, lump-free consistency. Small quantities can be mixed by hand using a wooden or plastic stirrer. For larger batches and optimal performance, the use of High Shear Jesmonite Mixing Blades is recommended to achieve a uniform blend.
Jesmonite pigments can be added either directly to the AC100 Liquid before combining, or to the fully mixed material. Pigment loading should not exceed 2% of the total mixed weight. Because the pigments are highly concentrated, only a small amount is required to achieve strong, consistent colour results.
Working & Curing Times:
Once thoroughly mixed, AC100 offers a working time of approximately 5-10 minutes, making it ideal for efficient casting and laminating. If a longer working time is needed, Jesmonite Retarder can be added to extend usability.
Demoulding is typically possible after 20-30 minutes, although allowing a little extra time can improve results. The material reaches its maximum cured strength after 24 hours, ensuring excellent durability and long-term performance.
Code: 12065
Customer Reviews5.05 5.0/5 Based on 1 review
Casting powderReviewed by Christine.bunting1 on 30 Aug 2025
It seems ok
Fibreglass Supplies use Royal Mail, APC Overnight and the National Hazardous Pallet Network for our Next Day Delivery Services.
Royal Mail
Orders of up to 2kg will usually be sent using a Royal Mail First Class Service for National Next Day Delivery.
APC Overnight
Orders over 2kg and up to 30kg will be sent using a Fully Tracked Next Day Service using APC Overnight. Some smaller Roofing Kits that weigh up to 30kg in Total would be sent on this service. This includes Resins, Gelcoats and Topcoats which are classed as Hazardous and are decanted into 5kg Tins or Pales to comply with the Transportation of Hazardous Goods Act.
Pallet Network
All our larger orders by weight would usually be sent using the National Pallet Network. Non Hazardous Items can be sent using either the Pallet Network or APC Overnight.
All Hazardous goods over 30kg (which includes Roofing Kits over 30kg in total weight) are usually sent using the National Pallet Network on a Fully Trackable Next Day Delivery Service.
Click & Collect
All orders are eligible for Click & Collect. Pick up your items conveniently from our Cattedown Store, available Monday to Friday between 7:30 am and 4:30 pm (excluding Bank Holidays).
NB - Please note that our Direct Control of the Delivery Element extends to making sure we pick pack and dispatch all orders on time. As we have no Direct Control over the performance of any individual courier we would not be responsible for refunds due to the late arrival of any order.
We always work hard with customers to overcome any issues that arise so please call us if you do have any concerns with regard to tight delivery deadlines so that we can provide great advice if needed.
Please read our Returns policy laid out below.
Under the Consumer Contracts Regulations 2014 you are entitled to return goods within 14 days of delivery for a refund of the cost of the goods. The delivery costs and any packaging are not included in the refund. The returned goods should be in the original containers and unopened. It is the customers responsibility to pay for the cost of returning goods to our Business Premises.
Some of our products are made to order and as such once ordered are non refundable and non returnable. These include coloured gelcoats, topcoats and resins.
These Consumer Regulations do not apply to business purchases (B2B). However we will always help in any way and look to find a suitable and mutually acceptable solution should any issues arise through the order process.
It is the customers responsibility to understand the suitability of the product before its use. Technical and Safety Data Sheets are available for all products where applicable. These can be found on most product description pages or if not are available on request. If you are unsure please do not hesitate to contact us for expert advice and product suitability and application.
To organise a return please contact us on the following.
