Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Call emergency services for severe breathing difficulty, blue or gray lips, collapse, a seizure, inability to wake the person, or rapidly worsening symptoms.
And for anyone, someone who:
Seek urgent medical care if any of the following develops after the initial exposure:
Burn follow-up may include dressing changes, checks for infection, scar management, and exercises to preserve movement.
Eye exposure may require follow-up with an eye specialist.
The article also says
Follow the observation and wound-care plan given by the poison center or treating clinician.
A person who feels well after a minor exposure may need only home monitoring, while someone with aspiration symptoms, a burn, or concentrated fume exposure may need reassessment.
After a workplace incident, report the exposure according to workplace procedures.
An occupational health review may help prevent another event.
This can include checking ventilation, temperature controls, respiratory protection, protective clothing, training, and the Safety Data Sheet.
Every sign above is quoted from the sofidex article on Asphalt cement poisoning. If you are not sure, err upward — it is always reasonable to be checked.