Clearcast Water Clear Polyester Casting Resin + Catalyst is a premium-quality, optically clear resin system designed for high-gloss casting, object embedding and professional creative projects. Perfect for jewellery makers, sculptors, model makers and set designers, this versatile polyester resin is ideal for producing crystal-clear castings with excellent surface detail and a smooth finish.
The low viscosity allows the resin to flow easily into moulds and around embedded objects, making it highly suitable for paperweights, encapsulation projects, decorative castings and fine-detail mouldings. Once fully cured, it can be compounded and polished to achieve a stunning, glass-like shine, giving your work a premium, professional appearance.
The catalyst ratio can be adjusted depending on the type of application. For standard small castings, mouldings and paperweights, a 2% catalyst mix is typically suitable. For larger moulds or multi-layer pours, catalyst can be reduced to 1%, while thinner coatings may require up to 3% catalyst to generate sufficient heat for curing.
Curing time will vary depending on ambient temperature, catalyst level and pour depth. Under typical conditions, curing can take as little as 2 hours, but in colder environments or thin pours it may take up to a couple of days.
This is a ready-to-use kit supplied with everything required to begin casting straight away. Resin is supplied by weight, not volume, ensuring accuracy and consistency when ordering and measuring. Each kit also includes a catalyst and a syringe for controlled dispensing, helping you achieve the correct mix ratio for your project.
What’s Included: Water clear polyester casting resin (supplied by weight), catalyst (hardener) & 10ml syringe for accurate measuring.
Applications: Object embedding and encapsulation, jewellery making, paperweights, decorative mouldings, sculpture casting, set and prop design.
Mixing Ratio Guide (Catalyst to Resin):
Curing Time:
Curing depends on temperature, catalyst amount and pour depth:
Important: As with most polyester resins, this product has a strong odour. You may notice the smell even while it is sealed in its container. We recommend using this resin in a well-ventilated workspace and to follow all supplied instructions carefully. Detailed instructions are included with every kit, and it is always advisable to test a small piece before committing to a larger project. For additional guidance, there are many excellent online resources and tutorials available.
If you need help choosing the right resin or catalyst ratio, expert advice is available Monday to Friday, 8am–5pm.
Code: 10938
Customer Reviews5.05 5.0/5 Based on 1 review
Good stuffReviewed by Mimmo0857 on 09 Jul 2025
Good stuff
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.
