Your Exterior surface was sealed with multiple coats of a high-solids, UV-inhibiting, penetrating solvent-based sealer. This sealer will repel dirt, dust and other substances that can get a foot-hold on concrete surfaces and promote the growth of mold and mildew. Basic care is as shown below:
1. If you notice a powdery white or splotchy appearance; especially after a rain, the sealer is doing its job. This is the dirt/dust mentioned above. A rinse with a garden hose followed by a leaf blower to remove excess water will fix this.
2. Pressure washing is generally not needed. A rinse and a blow will remove most things on the surface.
3. If there was a spill of a soft drink or something you didn’t see right away, use a mild soap like Ivory liquid in some warm water to loosen the material. Rinse and blow and you are back to a clean surface.
4. Plastic glides or Magic Movers should be affixed to heavy furnishings or those which will move frequently.
5. Potted plants should have a dish placed under them to catch excess water; this is especially true if you use a lot of fertilizer on the plants.
6. The surface should be resealed from time-to-time. The manufacturer of the sealant recommends resealing every 1 to 2 years. How often your surface needs to be resealed depends on the amount of rain and sunlight it receives. When you start to notice that water doesn't bead up on or seems to absorb into the surface, it is time to reseal.