Then there's encryption software to seal off your hard drive in case your computer goes for a walk.
Now the Germans are scrambling to seal off this hole in their fence before Murdoch's hordes pour through it.
Countries have already begun to seal off their markets against foreign products in an effort to protect domestic producers.
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Work to seal off the mine is due to start later and is expected to be completed in 10 weeks.
Saudi Arabia is building a giant border fence to seal off its troubled frontier with Yemen, Saudi border authorities have told the BBC.
Access is less tight and demonstrations will be allowed to take place here, but police will be able to seal off the area quickly if necessary.
The Republicans' version of homeland security is to seal off the Mexican border, beef up protection of military bases and limit screening at ports and transportation lines.
Some advocates wants billion-dollar barriers constructed to seal off Lake Michigan from the Mississippi watershed, which opponents say would disrupt shipping traffic and cause flooding around Chicago.
So a lot of the focus has been to seal off that possibility by creating a rebel-controlled buffer zone on the Syrian side of the Israeli-occupied Golan Heights.
Meanwhile a country such as Panama would prefer a cooler world in which ice continues to seal off the North-West Passage and to prevent competition with its canal.
It seems sort of silly today, but we looked around the house and wondered which room would be easiest to seal off if something poisonous was released into the air.
Travelling around the holy sites of Bethlehem is made difficult by the West Bank Barrier, a security wall built by the Israeli army to seal off the West Bank from the rest of Israel.
The issue is significant because it could influence the debate over whether to seal off Lake Michigan from the Chicago waterways, a mammoth engineering task that would cost billions of dollars and take years to complete.
Officers then decided to "seal off" the group from the march.
Also in demand are plastic sheeting, duct tape and latex gloves, which people want to help seal off a room in their house in the event of bioterrorism.
Fawaz Abu-Khadijeh, a cabdriver who is a regular at the mosque, recalls Sheik Safwat asking him for curtains to further seal off the women's prayer area, then separated from the main hall by an eight-foot wall.
Essex lost Mark Pettini first ball but Flower, who guided Essex to FP Trophy glory at Lord's last month, made 68 off 42 balls to seal it with an over left.
Harmison flashed another catch behind, Mitch Claydon was lbw to Sajid Mahmood, who then took a simple catch at mid-off to put the seal on a miserable effort from Durham 20 minutes before lunch on day three.
Gabriel Agbonlahor drove in a deflected shot off Ryan Nelsen to seal the win.
Alex Gidman then hit an unbeaten 52 off 35 balls to seal victory and dent Glamorgan's chances of qualification.
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Gary Hooper came off the bench to seal Celtic's victory, finishing well at the end of a one-two with Georgios Samaras eight minutes from the end.
Van Persie came off the bench to seal it with a fine individual effort and then a curling left-foot shot past Brad Friedel after being set up by Pires.
Nor can India seal off its financial system to the same extent as China.
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Goggin, meanwhile, now believes he can hold off the chasing pack to seal his first victory in 185 starts on the PGA Tour.
Chinese pirated video games and cell phones sell alongside North Korean knock-offs throughout the country, causing the police to often raid the establishments and finally seal off the properties with concrete blocks.
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Mr Critchlow said a technical bulletin was issued to gas engineers more than 18 months before the tragedy instructing them to cut off the base of the grill seal with scissors.
If a stable column of mud has been set up in the well, keeping the oil at bay through its sheer weight, the next step would be to set cement in the well and seal it off permanently.
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Lee Keun-Ho rounded off the scoring five minutes later to seal the victory.
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Hundreds of activists started to make their way using 4x4 vehicles, so popular in the Gulf countries, trying to reach the new location before the police could seal it off.
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