Akfix A 1500 Heat Fighter - High Temp Fireplace Sealant

Akfix 1500 Heat Fighter High Temp Fireplace Sealant is a one-part, silicate-based high temperature sealant formulated for sealing and repairing fireplaces, ovens, chimneys, and stoves. This professional-grade fireplace sealant provides strong adhesion to brick, concrete, stone, and metal, forming a durable, heat-resistant bond that withstands direct flame and temperatures up to 2732°F (1500°C). Once cured, it becomes rock-hard, ensuring long-term reliability without cracking or fragmenting.

Features & Benefits

• Heat Resistant up to 2732°F (1500°C): Performs reliably under direct flame exposure.
• No Cracking or Fragmentation: Cures to a solid, long-lasting joint that maintains stability under extreme heat.
• Fast Drying: Skins within 3–5 minutes, saving time during installation.
• Low Odor & Safe Indoors: Formulated for indoor applications without harsh fumes.
• Strong Adhesion: Bonds effectively to brick, concrete, stone, and metal surfaces.

Application Areas

• Brick Fireplaces: Effective sealant for masonry joints in fireplaces.
• Stone Fireplaces: Ideal for sealing and repairing decorative stone surrounds.
• Gas Fireplaces: Works as a reliable gas fireplace sealant.
• Fireplace Cracks & Joints: Fills and seals cracks and gaps for a durable repair.
• Stoves & Chimneys: Suitable for wood or pellet stoves, insulating and sealing chimney joints.

How to Use

• Surface Prep: Clean the area to remove dust, grease, and loose materials. Surfaces should be dry and stable.
• Application: Attach the cartridge to a caulking gun and cut the nozzle tip. Apply evenly into the joint.
• Tooling: Smooth with a putty knife or gloved finger for a uniform finish.
• Curing: Let air-dry for 24 hours, then gradually heat up to 482°F (250°C) to fully cure the sealant.
• Safety: Use gloves and ensure adequate ventilation during application.

Specs

• Chemical Base: Sodium Silicate
• Temperature Resistance: Up to 2732°F (1500°C)
• Skin Time: 3–5 minutes (at 73°F (23°C) / 50% RH)
• Color: Black