How to rejuvenate second hand terracotta roof tiles?

[Giz]

Hi, I purchased 12 second hand (reclaimed) terracotta roof  tiles, with an  intention to place these in the void created by removing an evaporative cooler..These tiles match the current ones I have on my roof in terms of brand and colour.  However these second hand tiles have lichen and moss on them.

I have pressure washed the lichen and moss away.  Unfortunately the second hand tiles do look deglazed.

How do I rejuvenate these tiles before they go up on my roof?

Thank you!

[Jason]

Welcome to the Bunnings Workshop community @Giz. We're pleased to have you join us. 

You might like to share a couple of photos of the tiles so members can see what you are working with. 

Let me also tag a few helpful members to kick off the discussion: @Nailbag, @Noyade and @Jewelleryrescue.

Jason

[Nailbag]

Hi @Giz 

You won't get that glazed look back. But since you have already done the cleaning, you could use a product like this to add a gloss finish. Just follow the directions for preparation.

Nailbag

[Giz]

Thank you.  

I suppose this will also help prevent rain coming through the tile into the house right?

[Giz]

 

 

And the existing tiles on roof