10% OFF All Gelcoats & Topcoats with voucher code: GEL10
10% OFF all Arts & Crafts products with voucher code: ARTS10
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At Fibreglass Supplies, we are able to produce Gelcoat Filler in any RAL or British Standard Colour to meet your project requirements. Please call us today to discuss your requirements and availability. Our gelcoat fillers can be made to order in white, off-white/cream, light grey, dark blue, signal blue, green, black, red and much more.
Gelcoat fillers can be used with the addition of catalyst hardener (MEKP Organic Peroxide) for filling holes and cracks, above and below the waterline. They are also suitable for repairing gloss coats on caravans, canoes and camper vans.
With a mayonnaise-to-peanut-butter consistency, gelcoat fillers spread smoothly, stay in place without sagging, and can be built up in layers to repair slightly deeper holes, before being sanded back to match the profile of your project. Thanks to the presence of wax in the formula, the filler cures effectively on external surfaces, leaving a strong, smooth finish ready for final preparation.
Please note, our Gelcoat Fillers are available in ANY colour. Prices may vary based on some specific colours.
How To Order Your Custom Colour
1. Order by phone (quickest way):
2. Alternatively, order online:
Price confirmation for premium colours: If the colour is more costly than the standard, we will give you a call to take a further payment.
Customer Reviews4.75 4.7/5 Based on 3 reviews
Good productReviewed by Robert.delaney1948 on 10 Oct 2025
The filler was in a tin smaller than the website picture which had me worried at first. In the event I only needed to mix 20% of it to repair the damage to my caravan and I had almost enough left over to cover a patch on my conservatory roof. I shall finish the roof with the second mix. The product was easy to apply and had a long working time. It went off nicely. I would buy large syringes for measuring this filler in small quantities next time.
Coloured Gelcoat in RAL 2001Reviewed by Shonerob2 on 27 Aug 2025
Questions answered quickly, order arrived super quick and colour match was perfect.
Excellent colour matchReviewed by Descross7 on 09 Apr 2025
The gelcoat filler is an excellent colour mix, my only slight criticism would be that I would have preferred it to be slightly thicker ( less liquidy), but it’s still very useable
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.