Lacrysil "FIREPLACES AND STOVES" Fire-Resistant Sealant (silicate-based, black) is specially designed for sealing, caulking, and repairing high-temperature areas where resistance to direct flame, high temperatures, smoke, and gases is required. It withstands temperatures up to +1500 °C (peak), does not crumble, does not crack, and does not release toxic substances when heated.

Recommended Applications:

• Fireplaces (internal joints, fireboxes, chimneys, wall abutments)

• Stoves, ovens, barbecues, grills

• Chimneys and flues (section connections, joints with brick/metal)

• Metal stove doors, dampers, grates

• Connections of cast iron elements, fireclay bricks, ceramic inserts

• Repairing cracks and gaps in fireplace/stove masonry

• Sealing joints around chimneys, ventilation ducts in high-temperature zones

• Sealing joints in industrial furnaces, boilers, chimneys

• Repair and maintenance of solid fuel boilers, potbelly stoves, heaters

Suitable for these surfaces:

• Fireclay and refractory brick

• Cast iron, steel, metal elements

• Concrete, cement (in high-temperature zones)

• Ceramics, ceramic inserts

• Stone, natural stone (granite, marble in decorative fireplaces)

Not Recommended For:

• Joints with constant contact with water or steam (use silicone or MS polymer sealant instead)

• Aquariums or potable water tanks

• Surfaces constantly submerged in water

• Joints subject to constant mechanical friction or vibration (without fire resistance)

• Food contact surfaces or areas with direct food exposure

• Exterior joints without protection from precipitation (if full water resistance is needed, use MS polymer)

Important Recommendations Before Application:

• Surfaces must be clean, dry, free of dust, grease, old sealant, soot, or creosote

• It is recommended to clean with a wire brush or sandpaper (especially cast iron, metal)

• Do not apply to damp or very wet surfaces

• Avoid application during high humidity or rain

• Apply after cleaning and dust removal — the surface can be slightly dampened for better adhesion

• Do not apply a thick layer all at once (prefer 2–3 thin layers with intervals)

• Full curing occurs during drying + the first heating (slow firing is recommended after 24–48 hours of drying)

• Do not attempt to light the stove/fireplace immediately after application — allow to dry completely

Typical Usage Examples:

• Sealing gaps around fireplace or stove doors

• Sealing joints between chimney sections

• Filling cracks in fireplace or stove masonry

• Fixing and sealing cast iron grates and dampers

• Sealing joints between fireclay brick and a metal casing

• Repairing cracks in the firebox or chimney

• Sealing chimney abutments to walls or roofs

After full curing (24–48 hours) and the first controlled firing, the joint becomes completely fire-resistant, smoke-tight, and gas-tight. It is not afraid of open flames or high temperatures.

Lacrysil "FIREPLACES AND STOVES" Fire-Resistant Sealant — a reliable choice for fireplaces, stoves, and chimneys. Withstands open flame, smoke, and heat.