Sea Jay Cleat Backing Block

If the cleat backing block on your Sea Jay has cracked or crumbled, it's a part we can usually sort without chasing discontinued spares. With your sample on the bench this is a realistic reproduction job.

Why these break

Backing blocks split under cleat load. The original was moulded thin to save cents at production volume. That was fine when the plastic was fresh — twenty years on, there's no margin left in it.

How we reproduce them

This is a quick job on our end — we take dimensions from your old part, adjust for print tolerances, and run a small batch so you have spares for next time.

We print these in PETG-CF. Carbon-fibre PETG is noticeably stiffer than the stock plastic, so the part holds its shape under clamping force instead of slowly creeping loose.

As with everything in our library: whether a part can be reproduced depends on size, load, heat, material, and having a decent sample to work from. Send photos first — the assessment costs you nothing, and we'll tell you honestly if a genuine spare is the better option.