Step 4: Filling in the patch
To start, work your way inwards with the back of your fingernail, to blend the edge further and ensure your patch doesn't end up lumpy.
We're going to fill in the centre with the same kneading technique - push down, and then smudge out with your nail.
When you're done, use a dry and then soapy finger to smooth it all down and even out the sugru.
TOP TIP: make the sugru very thin, this will make the patch nice and flexible. As a guide, one mini pack (5g) of sugru is enough to create one large patch (the size of a mug)