MORTACLAY-40d Mortar 50 lb

MORTACLAY-40d is a high-performance fireclay refractory mortar for laying, bonding, and repairing firebrick in fireplaces, pizza ovens, kilns, furnaces, fireboxes, and other high-temperature masonry projects. This 50 lb dry mix is made from primary refractory raw materials and develops a strong ceramic bond after proper firing.

Quick specs

• Material type: dry fireclay refractory mortar
• Package size: 50 lb bag
• Temperature use: high-temperature refractory masonry, up to 3000°F when used as directed
• Preparation: add clean water and mix to a workable mortar consistency
• Best for: firebrick joints, masonry repairs, refractory linings, ovens, fireplaces, kilns, and furnaces

How to choose it

• Use MORTACLAY-40d when you need a dry mortar for setting or repairing refractory brick.
• For small patching or ready-to-use adhesive work, R-Mort or R-CEM may be easier to apply.
• Coverage depends on brick size, joint thickness, and the condition of the surface.

Shipping note

This is a heavy refractory material, and shipping cost can vary by destination. Use the cart shipping preview before checkout. For larger quantities or orders over 700 lb, please review our Shipping & Bulk Orders page or contact us before placing the order.

FAQ

Is this ready to use?
No. This is a dry mix. Add clean water and mix before application.

Can it be used with firebricks?
Yes. It is designed for refractory masonry and firebrick work.

Can I buy multiple bags?
Yes. For heavy or bulk orders, contact us so we can help check the best shipping option.