1.   It may have damaged rubber seals on the equipment, rendering them unsafe.

2.   Because insulated glass is a sealed unit, you cannot cut it without damaging the seal.

3.   But do not boil lids, as that may damage the seal.

4.   The other danger, Cruthers wrote, is that the bars damage the seals around openings in the mask.

5.   NASA said Friday it has indefinitely delayed the launch of the Endeavour because O-ring seals were damaged by heat in the last two launches.