Abstract: An edge seal for a modular thermal isolation barrier includes a seal portion and a base portion. The seal portion is formed of a resilient material capable of deflection by a rigid adjacent structure. The base portion is formed of a rigid material and includes a pair of side channels opening at opposite sides thereof and a panel-receiving end channel. Each of the pair of side channels includes a first distal flange arranged to extend inwardly from one side of the respective channel and a second distal flange arranged to extend inwardly, and toward the first distal flange, from the other side of the respective channel, whereby each side channel is generally C-shaped and includes a channel opening having a width that is narrower than a width of a channel interior. Each of the seal portion and the base portion has a generally uniform cross-sectional shape.

Abstract: A non-combustible gypsum/fiber board comprises two surface layers and at least one core layer, wherein the surface layers comprise a gypsum composition that is reinforced with organic fibers, and the core layer comprises a gypsum composition containing no more than about 3% by weight of organic materials.