How Does Granite Sealer Work
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Sealers for stone countertops are composed of either a water-dissolved resin or a petroleum-based solvent. These substances form a film upon application to the surface, blocking out dirt, dust, and moisture from penetrating into the stone. For the sealer to be effective, it must be given a sufficient amount of time to be taken in by the stone’s pores, thereby sealing them up permanently. After the sealer has been absorbed, any extra sealer is wiped away, the water or solvent evaporates, and the resin hardens and creates a guard against stains and light damage.
However, staining can still happen even if the granite is sealed. The sealer is not able to completely fill every pore in the stone, so if coffee, wine, oil, or other liquids are left for a long period of time on the countertop, the liquid may eventually pass through. Remember that the barrier created by the granite sealer is actually below the surface, so while deep staining is avoided, surface staining is still possible if the substance is left for an extended period.
Granite sealers do not totally prevent staining, but they can significantly reduce the amount of liquid absorbed, making it very hard to damage the delicate granite surface. It is important to note that the degree of protection is dependent on the quality of the sealer and the application process.
