🔍 Key Concepts

• Temporary vs. permanent repairs on furnace brickwork • Properties of refractory materials used in high-temperature areas • How different materials are applied in place (poured, troweled, or in blocks)

💭 Think About

• Which material can be quickly applied in place to fill gaps or damaged spots without dismantling surrounding brickwork? • Which option is specifically designed to withstand direct flame and high furnace temperatures while still being moldable or formable on-site? • Which choices are mainly for insulation or structural build-up rather than spot patching?

✅ Before You Answer

• Confirm which material is described as moldable or workable when installed, suitable for patching damaged areas. • Check which option is specifically classified as a refractory (heat-resistant) rather than just an insulator. • Eliminate any material that normally comes as rigid blocks or loose powder not easily shaped into a quick patch.