It is a word borrowed from Spanish, but has become naturalized in Tagalog and is widely used.
Here are some examples:
* "Ang dagta ng puno ay ginagamit sa paggawa ng papel." (The sap of the tree is used in making paper.)
* "May dagta sa kamay ko." (I have sap on my hand.)
Note that "dagta" can also refer to "tar" or "pitch," but it's more commonly used to refer to "sap."