For another sealant choice, Duragloss products can be found at CarQuest Auotparts stores all over the USA. Here's their link to their store locator.
CARQUEST Auto Parts - Store Locator
Here's a brief summary of steps...
1) Wash with Duragloss 901 car wash using a sheepskin mitt. Use the two bucket method with grit guards in the buckets. Always wash in the shade. Dry with Microfiber towels.
2) Clay the surfaces with a Claymagic kit from Autozone. Clay removes bonded surface contaminants that washing doesn't remove and leaves a much nicer / smoother surface. Always use plenty of lube with the clay so you don't scratch the surface.
3) Apply Duragloss PBA 601 (Pre-Bonding Agent) to entire car and let it haze. Then wipe off with a clean microfiber towel.
4) Apply Duragloss TPP 105 Total Performance Polish / Sealant).
5) After 12+ hours, apply another layer of Duragloss TPP 105.
6) After 12+ hours, apply some Duragloss FC 921 (Fast Clean & Shine) with a clean microfiber towel. The FC 921 will add antistatic properties to the surface to minimize attraction of dust, etc, and it adds a little bit of slickness and more beauty to the finish. This will keep your car looking nice for a long time and give you 6+ months of protection.
If you wash your car every two weeks or month, etc, then wash with Duragloss 901 car wash. After washing, apply a thin coat of Duragloss 951 Aquawax. It's a simple spray on / wipe off product that can also be used while the car is still a little bit wet. This will boost the protection even further and assure good uv protection, etc. Apply the FC 921 for added beauty, slickness and antistatic properties.
There's a lot of good product choices out there in addition to Duragloss, but the Duragloss products offer solid performance (shine, gloss, protection, etc), are priced very reasonably and are available nationwide through Carquest.