Akfix A1500 Fireplace Sealant

Akfix A1500 Fireplace Sealant is a one-component, silicate-based joint filler specially formulated for high-temperature sealing and insulation applications. It withstands temperatures up to +2732°F (1500°C), making it ideal for fireplaces, stoves, ovens, and chimneys. The paste consistency ensures easy application, smooth finishing, and long-lasting adhesion to porous materials like brick, stone, and concrete.

Key Features & Benefits

• Extreme Heat Resistance: Withstands direct flame and temperatures up to +2732°F.
• Durable & Crack-Free: No fragmentation or cracking after curing.
• Fast Drying Formula: Quick skin formation and rapid curing for efficient work.
• Excellent Workability: Easy to apply, shape, and clean before curing.
• Low Odor & Paintable: Safe indoor use; can be painted with heat-resistant paints.
• Versatile Use: Bonds perfectly to brick, concrete, stone, and metal surfaces.

Typical Applications

• Sealing and insulating joints exposed to high heat.
• Filling cracks in fireplaces, chimneys, wood stoves, and ovens.
• Suitable for sealing soot doors and joints in heating systems.
• Adheres well to stone, brick, concrete, and metal (use caution—metal expands with heat).

How to Use

1. Surface Prep: Ensure surfaces are clean, dry, and free from dust or oil. Slightly moisten very porous surfaces.
2. Application: Apply sealant with a caulking gun. Smooth with a scraper or putty knife.
3. Curing: Allow to dry completely. Gradually heat up to +482°F (250°C) for final hardening — it will turn dark grey and become extra tough.
4. Cleanup: Remove uncured material with water; cured sealant must be removed mechanically.

Limitations: Not suitable for moving joints or materials that expand/contract with temperature.

Safety: Use in a well-ventilated area, wear gloves and eye protection, and follow MSDS guidelines.

Technical Specifications

• Chemical Base: Sodium Silicate
• Consistency: Paste
• Skin Forming Time: 3–5 min (at 73°F and 50% RH)
• Density: 2.04 ± 0.02 g/ml
• Curing Rate: 0.1 inch / 24 hr
• Hardness (Shore A): 75 ± 5
• Application Temperature: +41°F to +95°F (+5°C to +35°C)
• Temperature Resistance: Up to +2732°F (short-term)
• Shelf Life: 12 months (in unopened packaging)
• Packaging: 10.1 fl oz (Black), 12 pcs/box

TDS