These loosely-knitted fiberglass fabric seals are more flexible and conformable than High-Temperature Slotted Rope Seals. Also known as drop-warp and bolt-hole tape, they have openings along the center to accommodate bolts and rivets. Use them on metal flanges, as well as on oven, furnace, and boiler doors. They resist grease, oil, hydraulic fluid, and solvents.

Alumina silicate is loosely woven to create these ceramic fiber seals that are stronger, more flexible, and able to resist higher temperatures than Ultra-High- and Low-Temperature Rope Seals. They are commonly used as to tie products together during high-temperature processing, but they can handle cryogenic applications just as well. They won’t burn and they resist molten metal splash. These seals also resist steam, salts, grease, detergents, bleach, and hydraulic fluid; however, they will absorb these substances. Push them into the groove that’s commonly built into oven doors, furnaces, and tanks.