For repairs to fire backs, internal flue pipes, solid fuel heaters and boilers. Vallance Fire Cement - Natural 5kg 591780. Extreme Heat Resistance: Withstands temperatures up to +1400°C, perfect for high-heat applications like fireplaces and stoves. Strong Cement-Like Finish: Dries hard and strong like cement when exposed to heat, ensuring a durable, long-lasting seal. Smoke & Fume Tight: Creates airtight joints that prevent smoke and fumes from escaping – ideal for safe home heating. Easy to Apply: Ready-mixed paste – simply trowel or knife into place. No mixing or prep needed. Easy Cleanup: Cleans up easily with warm, soapy water before drying.