[Trevor Booth]

From the slide rule department,
Explosafe is (was) manufactured by the expanded metal company in the UK (Expamet). It is made from alum foil in the same manner as the expanded metal used on radio speakers and industrial walkway grating. I set up a factory in Oz to make expanded metal and had the opportunity to see several demonstrations of explosafe. The purpose of explosafe is not to prevent surge ( but it does that to a small degree) but to prevent explosion in the event of a rupture. It works by containing the fuel on the wetted surface of the foil allowing it to burn not explode and it works. If you can get it use it. It will not harm EFI systems, any decent filter will trap it in the unlikely event any breaks away.

I noted that Ben L has a problem with the foam in his car. it is probable that the foam is Miracell foam. It degrades over time. Just replace it. I understand that it is ok with modern day fuels.

I could not upload the crash video mentioned in my last post it was too large. I will post some more info on crashworthiness indicating the behaviour of a tube frame chassis in a frontal impact.