Composite Xchange came out of a problem we kept running into ourselves: freezers full of material nobody could use, and weeks spent chasing material nobody could find.
Composite Xchange was developed by Andy Steel, part owner of P1 Composites Ltd, a manufacturer of carbon fibre parts for Formula 1 and motorsport.
Anyone who has run a composites shop knows the freezer problem. Prepreg arrives on minimum order quantities, gets used for a programme, and the remainder sits frozen while its out-life ticks down. Eventually a roll that cost thousands is worth nothing, and you pay again to have it taken away. Multiply that across a few hundred UK firms and the waste is difficult to look at.
The opposite problem was just as familiar. P1 would need a small quantity of a specific material and find it simply wasn't available. Suppliers often couldn't sell less than a full 25 metre roll, and lead times ran into weeks. For a programme working to a race weekend, that's not a delay, it's a dead end.
So we did what everyone in the industry does quietly. We rang round. We borrowed stock from other companies, and lent ours back when they were stuck.
That worked, but only if you knew the right person to call. It was slow, it ran on favours, and it never reached beyond a handful of contacts. The material was out there. There was just no way to find it.
Composite Xchange is that network, made to work properly.
Carbon fibre is one of the most energy intensive materials in manufacturing. Every roll carries significant embodied carbon long before it reaches a workshop, so scrapping it unused is the worst possible outcome, environmentally and commercially. Keeping material in circulation is the single most effective thing the industry can do. No recycling process, however good, recovers as much value as simply using material for what it was made for.
That matters more every year. Formula 1 has committed to Net Zero Carbon by 2030 and teams are pushing the same expectations down their supply chains. Aerospace and wind customers increasingly want diversion and embodied carbon reported as part of the tender. Firms that can evidence it will win work.
Every trade through Composite Xchange is recorded, so sellers and buyers can show exactly what was diverted from waste and what was saved by buying recovered rather than new.
Every listing carries batch records, cure history and storage conditions. In this industry, material without paperwork isn't a bargain, it's a liability.
Listings show a reference, not a company name. Post your material and you stay anonymous throughout; offer collection and your address is shared only after payment. Nobody needs to advertise what they're overstocked on or what they're short of.
Recycling has its place, but it's the last resort. Material used as intended keeps far more of its value and its embodied carbon working.
Not everyone needs 25 metres. Being able to buy four is often the difference between a programme running and a programme stopping.
Andy has spent his career in composites, working across a number of UK firms before taking part ownership of P1 Composites, which makes carbon fibre components for Formula 1 and motorsport.
The same thing was true at every one of them. Skips filling with perfectly usable carbon. Freezers packed with rolls bought for a programme, never fully used, quietly running down their out-life until they had to be thrown out. Material that was no use to that company, and would have been exactly what somebody else was looking for.
That background shapes how Composite Xchange works: material is only useful if you can trust its history, and only valuable if you can get it when you need it. P1's own surplus forms the first listings.
If you've got freezer stock heading for its out-life, or offcuts filling a corner of the workshop, we'd like to hear about it.
