Thermalite

Thermalite a specific type of fuse used in pyrotechnic applications.

This fuse is used in high-power model rocketry as a means of simultaneously igniting multiple "clustered" rocket motors. A single flashbulb or flash pan is used to ignite pieces of Thermalite leading to each motor.

Thermalite comes in three burn rates identifiable by the colour of the fuse wrapping:
 * Pink: slow (20 sec/foot)
 * Green: medium (10 sec/foot)
 * White: fast (5 sec/foot)

Thermalite safety fuses and connectors were manufactured in Quebec by ICA Canada Inc., however in November 1995 they ceased manufacturing of detonator cord. Sources for thermalite are increasingly hard to come by and purchasing it by mail will usually require permits and licenses. As a result, those who want to use thermalite fuses will sometimes make their own.