Being as how you are Somewhere in Malaysia, this might be easier said than done, but maybe you should hunt down a different brand of Dyneema/Spectra. It's cheap as chips here, if you buy it from the Commercial Fisherman's stores and the usual one is a grey plaited product. The splicing instructions looks too easy to be true - you essentially just wriggle it in and out of itself. Because of the way it's laid up, as soon as it comes under load. the lay tightens and grips harder, so the more load, the harder the grip. As they use this rope for dragging trawl nets over the sea bed (let's not go there, this is no place for a rant!) the splices obviously hold!
NZ has quite a few trade links with Malaysia, so you might find some: it's grey and slippery looking: the layup looks almost tubular.
But you can always use three-strand polyester - or even polyprop. It's still terribly strong.