Maxset-50 fine Refractory mortar 1500℃- Nairobi, Kenya.

Maxset-50 Fine Refractory Mortar

A premium, alumina-based air-setting mortar for bonding and jointing firebricks in furnaces, kilns, boilers, and incinerators. Rated for continuous use up to 1500°C, it offers excellent adhesion, strong thermal shock resistance, and a smooth, fine texture for tight, clean joints. Easy to apply with a trowel — ideal for both industrial installations and firebrick repairs. Supplied in 25kg bags.

Maxset-50Fine Refractory Mortar

Premium High-Temperature Bonding Mortar for Firebrick & Refractory Work

Maxset-50 Fine is a high-performance, alumina-based refractory mortar engineered for setting, bonding, and jointing firebricks and refractory linings in environments exposed to extreme heat. Rated for continuous service up to 1500°C, it is trusted across industrial, commercial, and domestic refractory applications where strength, heat resistance, and long-term durability are non-negotiable.

Its finely ground formulation gives it a smooth, workable consistency that spreads easily with a trowel, fills joints tightly, and produces a clean, professional finish — making it equally suited to large industrial installations and smaller DIY repair jobs.


Key Features

  • High Temperature Rating — Withstands continuous exposure up to 1500°C without breaking down, cracking, or losing bond strength.
  • Alumina-Based Composition — Formulated with a high alumina content for superior thermal stability and resistance to thermal shock (rapid heating/cooling cycles).
  • Fine, Smooth Texture — The “Fine” grade is milled to a finer particle size than standard refractory mortars, allowing for thinner, tighter joints and a smoother surface finish.
  • Excellent Adhesion — Bonds strongly to firebrick, refractory brick, and other heat-resistant masonry, creating durable, long-lasting joints.
  • Air-Setting Formula — Hardens naturally through air drying, with no requirement for immediate firing, though heat curing further strengthens the bond.
  • Easy Application — Smooth, non-sag consistency makes it simple to apply with a trowel or pointing tool, even for first-time users.
  • Resistance to Thermal Shock — Maintains structural integrity under repeated heating and cooling cycles, reducing the risk of cracking over time.
  • Versatile Use — Suitable for new construction as well as repair and re-pointing of existing refractory brickwork.

Recommended Applications

Maxset-50 Fine Refractory Mortar is ideal for:

  • Industrial and commercial furnaces
  • Kilns (ceramic, brick, and industrial kilns)
  • Boilers and boiler linings
  • Incinerators
  • Foundry and casting equipment
  • Pizza ovens and bread ovens
  • Fireplaces and chimney liners
  • Firebrick lining and repair work
  • Domestic and commercial fireboxes

It is used across a range of industries including steel, cement, power generation, foundries, ceramics, and hospitality (commercial kitchens and pizzerias).


Typical Product Specifications

Property Detail
Product type Alumina-based, air-setting refractory mortar
Grade Fine (finely milled for smooth application)
Maximum service temperature Up to 1500°C
Form Dry powder — mixed with water on site
Color Grey/off-white (natural refractory tone)
Application method Trowel or pointing tool
Curing Air-setting; heat curing recommended before full-temperature use
Packaging 25 kg bags (other sizes may be available on request)

Note: Exact technical values (compressive strength, water demand, bulk density, shelf life) can vary by batch and should be confirmed against the current manufacturer’s technical data sheet before specifying for critical industrial applications.


How to Use

  1. Prepare the surface — Ensure firebricks and joint surfaces are clean, dry, and free from dust, grease, or loose material.
  2. Mix the mortar — Gradually add clean water to the dry powder, mixing to a smooth, lump-freemoldable paste. Avoid over-watering, as this weakens bond strength.
  3. Apply — Spread a thin, even layer onto the brick face and edges using a trowel. Aim for tight joints (typically 2–3 mm) for best thermal performance.
  4. Set bricks — Press bricks firmly into place, removing excess mortar with a trowel or pointing tool for a clean finish.
  5. Cure — Allow the mortar to air-dry for the recommended period (typically 24–48 hours) before exposing the structure to heat.
  6. Initial firing — When first bringing the installation up to temperature, do so gradually (a slow, low-heat fire raised incrementally) to drive off residual moisture and avoid thermal cracking.

Why Choose Maxset-50Fine

  • Reliable performance under extreme heat — formulated specifically for the demands of refractory and high-temperature environments.
  • Tight, clean joints thanks to its fine particle grading — ideal where appearance and precision matter as well as performance.
  • Trusted across industries — from heavy industrial furnace work to home pizza ovens and fireplaces.
  • Simple, no-fuss application — suitable for professional refractory contractors and confident DIY users alike.

Packaging & Availability

Maxset-50 Fine Refractory Mortar is supplied in 25 kg bags, suitable for both small repair jobs and larger installation projects. Contact us for current pricing, bulk order options, and delivery within your area.


For technical guidance on selecting the right refractory mortar for your specific application, or for a full technical data sheet, please get in touch with our team.