We get this question from time to time and it is certainly worth answering! The answer is yes. None of the concerning reef harming ingredients are in Salty Britches. The list of ingredients to avoid according to savethereef.org are as follows:
oxybenzone (UV filter)
octinoxate (UV filter)
octocrylene
Homosalate
4-methylbenzylidene camphor
PABA
Parbens
Triclosan
Nano-Sized Zinc or titanium (note, must be nano-sized)
Any microplastic, such as "exfoliating beads"
In fact, Salty Britches will not blend with sunblock. The trick, is to apply Salty Britches to the skin and let it bind, usually takes a few minutes. You can apply sunblock on top of Salty Britches. The two repel each other so both can do their job.
"Reef Safe" is still an ongoing scientific study and often times a marketing term. You can look more into that on websites such as Consumer Reports "The Truth About Reef Safe Sunscreen."