Megapoxy 84 Epoxy Paste Adhesive for Ceramic Tile Linings

Megapoxy 84 is a high-performance, two-component epoxy paste adhesive specifically engineered for the demanding task of bonding high alumina ceramic tile linings onto steel or concrete substrates. Its formulation is optimised for applications encountering elevated service temperatures up to 120°C continuously. Megapoxy 84 cures to an extremely hard and durable state, boasting exceptional compressive strength (120 MPa) and flexural strength (55 MPa), ensuring tile linings remain securely bonded under severe industrial conditions involving abrasion and heat. The adhesive system consists of a white paste (Part A) and a blue liquid (Part B), mixing to a pale blue paste. While offering ultimate performance, application requires careful attention to the specific 4:1 mix ratio by volume and the relatively short 30-minute work time at 25°C.

Surface Preparation Focus (Priming): Achieving a tenacious bond relies absolutely on meticulous surface preparation. Steel substrates MUST be cleaned to a "white metal" finish (AS CK 9.4 - 1964 Class 3) via grinding or grit blasting. Concrete must be sound, clean, and mechanically prepared by scabbling or grit blasting to expose firmly held aggregate and remove all laitance/contaminants. The ceramic tiles themselves must also be clean and grease-free.

Cure Time / Work Time: Mix only enough material that can be applied within the 30-minute work time (at 25°C). The adhesive sets relatively quickly (approx. 4 hours at 25°C), develops toughness after 48 hours, and reaches full cure allowing exposure to service temperatures after 72 hours at 25°C. It is crucial to avoid exposing the newly bonded tiles to elevated temperatures during the initial 48-hour cure phase.

Coverage Rate: Apply mixed Megapoxy 84 at a rate of approximately 1.25 litres per square metre using a notched trowel to achieve the desired bedding thickness for the ceramic tiles.

Temperature Ranges: Designed for high heat environments with a maximum continuous operating temperature of 120°C. The minimum recommended application temperature is not explicitly stated but assume similar to other Megapoxy products (approx. 10°C).

Chemical Properties: As a robust Two-Part Epoxy system designed for industrial linings, Megapoxy 84 offers high resistance to wear and is expected to have excellent chemical resistance suitable for harsh processing environments (confirm specific chemical resistance with Megapoxy technical service if required).

Key Features of Megapoxy 84

• High Temperature Resistance: Engineered to withstand continuous operating temperatures up to 120°C, essential for many industrial processes.
• Extreme Compressive & Flexural Strength: Cures to an exceptionally hard and strong state (120 MPa Compressive, 55 MPa Flexural) to support and protect tile linings under load and impact.
• Specialised Formulation: Specifically designed for optimal adhesion to high alumina ceramic wear tiles and prepared steel or concrete substrates.
• Durable Industrial Performance: Provides long-lasting bonding solutions in harsh environments involving abrasion, moderate heat, and potential chemical exposure.
• High Bond Strength: Creates tenacious bonds capable of holding heavy ceramic linings securely in place, even in demanding orientations.

Why Choose Megapoxy 84:

• Performance Under Heat: The primary choice when bonding ceramic linings that will be exposed to continuous temperatures up to 120°C.
• Ultimate Strength & Durability: Provides the mechanical strength needed to ensure the integrity and longevity of critical wear linings in industrial equipment.
• Purpose-Built Solution: Specifically formulated chemistry for bonding high alumina wear tiles, offering optimised adhesion and performance compared to general-purpose epoxies.
• Reliability in Harsh Conditions: Ensures linings remain intact under demanding operational stresses found in mining, power, cement and processing industries.

When to Choose Megapoxy 84 versus Alternatives:

• Choose Megapoxy 84 over Standard Epoxies (e.g., Megabond, Megapoxy 254) when: Continuous service temperatures will exceed 80°C (up to 120°C) or when the absolute maximum compressive/flexural strength is required for extreme load/impact conditions in ceramic lining applications.
• Choose Megapoxy 84 over Cementitious or Silicate Adhesives when: Superior bond strength to steel and concrete, higher impact resistance, lower porosity, or better overall chemical resistance is needed for high-performance ceramic tile linings. Epoxies generally offer better adhesion and toughness.
• Consider other options when: Service temperatures exceed 120°C (refractory mortars/cements may be needed), extreme chemical resistance beyond typical epoxy capabilities is required, or a more flexible bond is necessary (epoxies are rigid). For applications below 80°C without extreme strength demands, other Megapoxy products might be suitable and easier to use (1:1 mix).

Trade-Specific Applications for Megapoxy 84:

Application Information

• Required Tools: Notched trowel, clean mixing containers, accurate volume measuring tools (for 4:1 ratio), mechanical mixer (low speed drill with paddle), spatulas, cleaning solvent (Megapoxy Thinners), appropriate PPE (gloves, glasses).
• Surface Preparation is CRITICAL: Steel must be grit blasted or ground to a 'white metal' finish. Concrete must be mechanically abraded (scabbled/blasted) to expose clean, sound aggregate. All surfaces must be free of contaminants. Tiles must be clean and grease-free.
• Mixing (4:1 Ratio by Volume): Measure 4 parts 'A' (White Paste) to 1 part 'B' (Blue Liquid) accurately by volume. Mixing entire pre-measured kits is advised to avoid errors. Add Part B slowly to Part A while mixing. Mix thoroughly for a minimum of 3 minutes, scraping sides and bottom, until a uniform pale blue paste is achieved.
• Application: Apply mixed epoxy to the prepared steel or concrete substrate using a notched trowel at approx. 1.25 L/m². Firmly press the clean high alumina ceramic tile into the adhesive bed, ensuring full contact and even bedding. Work efficiently within the 30-minute pot life.
• Curing: Allow 72 hours cure at 25°C before subjecting the lining to service temperatures (120°C max). Avoid elevated temperatures during the first 48 hours of cure.

Storage and Shelf Life

• Storage Requirements: Store kits in a cool, dry place, protected from direct sunlight and moisture.