Cape Town, South Africa - "sense and explode" technology in which polyurethane foam is designed to expand around valuable cargo, is being used to deter criminals from hijacking vans carrying such loads, according to a report in the Sunday Times of South Africa.
The paper's Bobby Jordan reports that the foam hardens in seconds to protect valuable cargo, so frustrating would be hijackers.
According to the report, this chemical "sense and explode" technology, developed in South Africa, uses a polyurethane dispensing unit (PUDU), inside vans carrying bank notes, bullion or other valuable contents.
The foam is designed to encase the cargo and harden rapidly. Thieves cannot quickly remove the casing, and this is what deters them from attacking vans that use the technology.
See more at http://www.timeslive.co.za/sundaytimes/article748766.ece/Chemical-pudding-spells-hard-luck-for-heist-gangs