The Kraken High-Temperature Black Fireplace Sealant is a one-component silicate-based sealant designed for high-temperature applications. The fireplace sealant is perfect for insulation and filling cracks in fireplaces, stoves, and other high-heat areas, ensuring a durable and reliable seal. Features & Benefits Extreme Heat Resistance: Withstands temperatures up to 2732°F (1500 °C), providing exceptional performance in high-heat environments. Direct Flame Resistance: Can handle direct exposure to flames without degradation. Fast Drying: Dries quickly to minimize downtime. Versatile Application: Suitable for all porous surfaces, including brick, concrete, and natural stones. Easy to Use: Simple application process and easy to clean. Durable Finish: No fragmentation or cracking after curing, ensuring long-term reliability. Low Odor: Formulated to be low in odor, making it safe for indoor use. Application Areas Brick Fireplaces: Effective brick sealant for fireplaces. Stone Fireplaces: Ideal stone sealant for fireplace applications. Gas Fireplaces: Reliable gas fireplace sealant. Fireplace Cracks: Perfect for sealing fireplace cracks and joints. Stoves: Suitable for wood and pellet stoves. Chimneys: Great for insulating and sealing chimney joints. Ovens: Can be used in high-temperature ovens. Outdoor Fireplaces: Provides weatherproof sealing for outdoor fireplaces. How to Use Surface Preparation: Ensure surfaces are clean, free from dust, oil, and loose particles. Cleaning Non-Porous Surfaces: Use a solvent and a non-fluffy cotton cloth. Moistening Porous Surfaces: Slightly moisten very porous surfaces before application. Application: Apply with a standard caulking gun, and smooth the surface with a rubber scraper or putty knife. Initial Heating: After complete solidification, the sealant may be carefully heated to +482°F to accelerate curing. Maintenance: Remove uncured sealant with a damp cloth; cured sealant requires mechanical removal. Specs Chemical Base: Sodium Silicate Consistency: Paste Skin Forming Time: 3-5 minutes (at 73°F (22.7 °C) and 50% RH) Density: 2.04 ± 0.02 g/ml Curing Rate: 0.1 inch/24 hours Shore A Hardness: 75 ±5 before heating Temperature Resistance: Short-term up to 2732°F (1500°C) Application Temperature: 41°F (5°C) to 95°F (35°C) Packaging: 10.1 fl oz cartridge, 12 cartridges per box Shelf Life: Up to 12 months with proper storage TDS