# DEF Search

> The community-verified map for finding diesel exhaust fluid (DEF) at the pump, truck stop DEF dispensers, and DEF locations near you.

DEF is a 32.5% urea / 67.5% deionized water solution that every on-road diesel engine built after 2010 needs to run — without it, SCR-equipped trucks derate and won't restart. DEF Search is an iOS app built for long-haul truckers and diesel pickup owners who need bulk DEF at the pump, not jugs off a shelf. Stations are verified and flagged by the driving community so the map reflects which dispensers are actually working, public, and stocked — not just which truck stops claim to have DEF.

## Pages

- [Home](/): App overview, screenshots, features, FAQ, and App Store download link.
- [Privacy Policy](/privacy): How DEF Search handles user data.
- [Terms of Service](/terms): Terms governing use of DEF Search.

## Optional

- [App Store listing](https://apps.apple.com/app/def-search/id6746346949): Download DEF Search for iOS.
- [Sitemap](/sitemap.xml): Full list of indexable URLs.