Sealing

    
Two sealing options: Penetrating sealer or a topcoat/surface sealer:
    
Penetrating sealers are clear and soak into the Slate with no change to appearance. The function of the penetrating sealer is to fill the pores and make the Slate less absorbent, keeping spills to the surface only. Keep in mind that all natural stone is porous; staining is still possible depending on what is spilled.
    
Penetrating sealers mixed with oil will darken & enrich the various colors in Slate but won’t add any shine. Think of it as moisturizer for the Slate. A penetrating sealer will help keep liquid spills on top of the stone rather than soaking in. It is important to note that penetrating sealers are not bulletproof, and all natural stone is porous. Staining can still occur depending on what is spilled.
    
Topcoat/Surface sealer will always impart some shine ranging from semi-gloss to high gloss. First we apply a large molecule chemical resistant sealer. This soaks into the Slate as much as possible to prevent water penetration and stains. Then we apply several coats of acrylic sealer that is chemical sensitive. This becomes a working surface as long as it is cleaned properly and recoated before the sealer has broken through and bare tile is exposed. It is very important that topcoat sealers are maintained properly or they will lose restorability. In some cases the coating may need to be stripped. Stripping is removing as much of the coating as possible and makes restoration more difficult as well as adding expense to the project.
    

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