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The Summer Catalyst Hardener is a high-quality organic peroxide (MEKP initiator) specially formulated for use in warm weather conditions where temperatures rise above 20°C. Unlike standard catalyst hardeners, this summer-grade version extends resin curing time, allowing you to work more comfortably in hot conditions and direct UV without the resin gelling too quickly.
The ideal choice for applying fibreglass flat roofing on hot summer days, Summer Catalyst Hardener gives installers greater control and flexibility during application. Beyond roofing, this product is also well suited for mould making, boat building, laminating, and casting projects, where an extended working time is required to ensure precision and quality.
The hardener is a clear, colourless liquid with a total active oxygen content of 8.8 - 9.0%, a density of 1.180 g/cm³ at 20°C, and a viscosity of 24 mPa.s at 20°C. It is typically used at a mixing ratio of 1 - 2% depending on conditions and project requirements.
Technical Specifications:
Important: A single MEKP initiator formulation cannot guarantee optimum performance across all resin systems. Always evaluate the summer catalyst in the specific resin you intend to use before committing to full-scale production.
Code: 27
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.