If the water leaves a darkened spot for longer than 10 minutes it needs sealer.
How to seal slate roof tiles.
Repeat until the whole surface is covered.
Like most other natural stones slate tile flooring requires sealing to aid in water repellency and prevent staining and scratching and sealer should be applied on a yearly basis.
Once you have covered the surface rub off any excess straight away with a clean cloth and allow to dry naturally.
You should have reinforced the frame of the roof earlier before.
If the slate flooring tiles have been installed for quite some time and you have decided to seal it now follow these cleaning steps.
At one time all slate.
Mix water and all around detergent to make a solution.
Mask off any adjacent surfaces that need to be protected during the application.
Mix liquid or powder oxygen bleach to water.
Clean the slate thoroughly and allow it to dry completely.
Shake or stir well.
Pull the trigger on the sprayer and coat the tiles with long sweeping motions of your arm.
Rub onto the surface of the slate in small circles.
Test for desired results in an inconspicuous area before continuing the application.
Take a spare piece of slate to a home store and discuss sealers with a knowledgeable salesperson.
Hold the sprayer nozzle 12 to 18 inches away from the surface of the tiles for best results.
Position the first.
Prep the slate for sealing.
Repair and reinforce the roof if applicable.
Use a lint free cotton cloth an old t shirt works best apply a little of the sealer on to the cloth.
Remove old roofing if applicable.
Next prepare an oxygen bleach solution.
Read all instructions and tips before the application so that you can plan the application correctly.
This is on its own a major job that can take days and require special tools.
How to apply sealant on slate tile.