Everbuild KOS Fire Cement is a ready-to-use, heat-resistant mortar ideal for sealing and repairing fireplaces, fire bricks, stoves, flues, and other applications enduring extreme temperatures. This black, 500g tub offers a convenient solution for small repairs and maintenance projects. KOS Fire Cement cures upon exposure to heat, forming a strong, long-lasting bond that withstands temperatures up to 1250°C. This fire cement is ideal for sealing and bonding in high-temperature environments.