Mortar protection

[23vc]

I’m repointing the entire gable end wall of my house, but the very top couple of feet triangle is too high for me to reach and use a grinder using any means that I’m comfortable with, and the pointing seems rock solid presumably because it’s protected by the barge soffit overhang.

I was planning on applying some kind of protection on it anyway, is there anything I can apply using eg. a roller on a pole, Thompson’s weatherseal etc any good for this?
Ta

 

[^woody^]

Thomsons and similar won't last due to UV degradation. You need a better quality silane/siloxane product that has UV inhibitors and last 25 years or so. Check the product specs.

BTW, by way of protection, these will give water repellency not any other protection.

 

[23vc]

Thanks. Water repellency is better than nothing, the area is pretty much entirely sheltered by the fairly deep barge soffit overhang at the apex.