Im not sure what you mean - is it a recipe *for* sweet chili sauce? Or is sweet chilli sauce an ingredient for something else? If its a ready made chilli sauce you buy it will be 1 syn per 20 calories. If its a recipe *for* sweet chilli saiuce then you'd need to post a link to where you've seen it and we can tell you a bit more
Ah right OK. Yeah shop bought stuff will usually be 1 syn per 20 calories, but if whatever recipe it is doesnt have much in it/the chilli sauce is very low anyway/it serves multiple portions then the recipe could well turn out free anyway