White granite variety is more and more popular with people, but the problem these stones brings after installment puzzle people’s brains.Most white granites (White Sesame) are easily to generate “water spot”, “yellowing” and be polluted. The internal cause is from granite’s composition, structure and water insensitive property. The mineral include active ferric oxide. The other cause is the detriment by water. In order to implement ideal paving effect, the protection treat before installment is very necessary. Of course, it can acquire effective shield based on correct collection and application of the protective agent.
1，The selection criteria of protective agent : The protective agent should have good water resistance （first-class above）；the protective agent should have good acid-resistance and alkali-resistance （rate variance with water resistance ≤5%）, deep penetrating.
2，The protection treat of floor stone before installment: clear dust and pollutant over the slabs that will be protected and then dries the slabs. Brush “Auya” penetration protective agent A-12S evenly onto the front, back and side surface two times. The slabs treated can be installed at normal temperatures after 3 days under natural cure.
3，The protection treat of exterior wall stone with cement pasting: clear dust and pollutant over the slabs that will be protected and then dries the slabs. Brush “Auya” penetration protective agent A-12S evenly onto the front and side surface two times. “Auya” concrete helpmate A-22 should be added into the pasting mortar.
4，The protection treat of white granite under the circumstances of hanging installment method: clear dust and pollutant over the slabs that will be protected and then dries the slabs. Brush “Auya” penetration protective agent A-12S evenly onto the front, back and side surface two times. The slabs treated can be installed at normal temperatures after 3 days under natural cure.
5，Attentions: Slabs should be fully dried before protection treat. The maintenance period should exceed seven days after brushing the protective agent during the winter in north area. Slabs shouldn’t be get wet by rain during the maintenance period.
