The SB-81 is an Italian plastic cased minimum metal anti-tank blast mine dating from the early 1980s.
The mine uses an air pressure based fuze, which gives it protection against overpressure and blast.
It can therefore be regarded as a blast resistant mine.
The mine is found in the Falkland Islands and the Western Sahara.
An electronically fuzed version of this mine (the SB-81/AR-AN) was also produced which featured an integral anti-handling device plus self-destruct capability.