Handle extreme temperature repairs with confidence using DAP High Heat Mortar, a professional grade solution engineered for masonry applications exposed to intense heat. This ready to use, black refractory mortar is formulated to withstand high temperatures while maintaining a strong, durable bond. Ideal for fireplaces, chimneys, and fireboxes, it provides a secure seal that resists cracking and deterioration under heat stress.
DETAILS
Manufacturer: DAP
Model Number: 18854
Product Name: High Heat Mortar
Color: Black
Size: 10 oz
Package Contents: 1 tube high heat mortar 10 oz
Package Quantity: 1 count
Form: Thick paste mortar
Intended Use: High temperature masonry repair and sealing
Application Method: Cartridge tube compatible with caulking gun or squeeze application
Cleanup Method: Water before curing
KEY FEATURES
Material: Refractory cement formulation designed for extreme heat resistance
Color: Black finish blends with firebox and masonry interiors
Size: 10 oz tube for controlled application in tight spaces
Heat Resistance: Withstands temperatures up to 2000 F
Bond Strength: High strength adhesion to firebrick stone and masonry surfaces
Durability: Resists cracking shrinking and breakdown under repeated heating cycles
Cure Time: Sets firmly with full cure in approximately 24 hr depending on conditions
Application Type: Ready to use formula eliminates mixing
Indoor Use: Suitable for fireplaces stoves and heating appliances
Shrink Resistance: Maintains integrity without excessive shrinkage
Application Control: Smooth consistency allows easy placement into joints and cracks
Warnings: Allow proper curing before exposing to high heat avoid skin contact use in ventilated area
APPLICATIONS
Repairing firebrick joints in fireplaces
Sealing cracks in chimney interiors
Setting and bonding firebrick in stoves and fireboxes
Patching damaged mortar joints in high heat environments
Maintenance of wood burning and gas fireplaces
Residential and light commercial heating system repairs
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