Hello everyone, I come from Serbia. I have a house that needs chinking, so I'm wondering what would be the best thing to do, some gaps are 20-30 mm, so I would need a more natural solution, which means avoiding silicone, and it's quite difficult to find chinking material in Serbia.

https://preview.redd.it/ysst3oa7rn3h1.jpg?width=188&format=pjpg&auto=webp&s=d93104a28b0c7ffb9ff3cd9008fec6eb3a6c0448

I was thinking about a mixture of slaked lime, sand, a little cement, fiber and an additive to stretch the mortar. If you have a fart, feel free to write. Thank you all in advance

Ps. I forgot to mention that I already have sheep's wool between the logs, which in our region was used to insulate and seal the logs.