You’d better make sure you have the right solar filter to protect your camera. Here’s a 2-minute video that shows how shooting the sun without protection can completely melt your DSLR’s sensor

ND 3.8is the correct value for solar exposure without risk of damage to your sensor. However, ND 5.0 is the minimum for direct eye solar observation without damage to your eye.

10 stop is only ND 3.0 which is 0.8 short of being safe for your sensor.

This is the one I have in my bag but still haven't used it yet.

I would suggest double stacking filters, just to be safe and make sure it filters IR as well.