Megapoxy MC

For high-traffic food and beverage facilities, chemical bunds, and wastewater infrastructure, Megapoxy MC provides a 100% solids, VOC-free epoxy maintenance coating that resists heavy abrasion, chemical exposure, and hydrogen sulphide gas. It protects concrete and steel substrates, curing to a hygienic, dust-free gloss finish that is suitable for structures in contact with foodstuffs.

Chemical and wear protection

Megapoxy MC is a high-build protective coating formulated to seal floors, walls, and structural steel against aggressive environmental hazards. For harsh or highly aggressive service conditions, a three-coat application is recommended to achieve a total cured dry film thickness of 0.4 mm to 0.5 mm. The cured coating resists chemical splash and immersion, protecting containment areas, plant rooms, and factory floors from chemical degradation. Where slip resistance is required for ramps, car parks, or forklift areas, the freshly applied first coat accepts a broadcast of epoxy-quality sand, glass beads, carborundum, or silicone oxide, or a fine aggregate can be mixed directly into the coating at a rate of 250 grams per 5 kg kit.

Numbers that matter

• Compressive strength (ASTM D695): 70 MPa (MC2 Rapid version only), providing a high-strength surface that withstands forklift traffic and heavy mechanical loads.
• Bond strength to concrete (ASTM D4541): >3 MPa, ensuring the coating adheres to prepared concrete substrates without delaminating under shear stress.
• Tensile bond strength to steel (ASTM D897): 13 MPa, providing high adhesion to properly prepared bright metal surfaces.
• Work time (at 25°C): 2 hours for the Standard version or 30 minutes for the MC2 Rapid version, defining the application window after mixing.
• Re-coat window (at 25°C): 8 hours for Standard or 4 hours for MC2 Rapid. If more than 24 hours elapses between coats, you must abrade the surface to a uniform dull finish using 60-grit paper.
• Coverage: 20 m² to 25 m² per 5 kg kit, or 80 m² to 100 m² per 20 kg kit.

Limitations

Do not apply Megapoxy MC if the substrate temperature is below 10°C. Do not rely on wire brushing for metal preparation, as it is not entirely satisfactory and yields minimal adhesion only. Do not apply directly to existing coatings; bonding to coated surfaces will result in inferior bond strengths compared to bare, prepared substrates. Mixing ratios must be precise; inaccuracies or incomplete mixing will lower the physical properties of the cured system, and may prevent a complete cure or cause discolouration over time.

Substrate preparation

To ensure high adhesion, substrates must be prepared according to their material class:

• Concrete: Must be free from grease and oil. Remove surface laitance by mechanical abrasion (scabbling, grit blasting, or grinding). If mechanical preparation is not possible, acid etch using a 1:1 hydrochloric acid and water mix at 0.5 litres per square metre, allow to react for 10 minutes, scrub with a stiff broom, wash thoroughly, and allow to dry for 24 hours. Concrete must be surface dry.
• Metal surfaces: Grit blast to AS CK 9.4 - 1964 Class 3 finish. If grit blasting is not possible, mechanically abrade to clean, bright metal, then degrease by flooding the surface with an industrial grade degreaser.
• Coated concrete: Remove all traces of existing paint by flame-cleaning or using a scutching tool, followed by diamond grinding or scabbling.
• Coated metals: Remove all paint, galvanising, or zinc coatings using a high-quality paint stripper, followed by grit blasting or grinding to a bright metal finish.

Mixing and application

Megapoxy MC is supplied in pre-metered kits. Pour the entire contents of Part B into the Part A container. Mix the components thoroughly, scraping the base and corners of the tin, then scrape the sides and mix again. Use a timer and mix to the following durations:

• Megapoxy MC (Standard): Mix for a minimum of 3 minutes, scrape the sides, and mix for a further 2 minutes.
• Megapoxy MC2 (Rapid): Mix for a minimum of 2 minutes, scrape the sides, and mix for a further 1 minute.

On highly porous concrete surfaces, prime first using Megapoxy LVS (Low Viscosity Sealer) applied at 8 m² to 10 m² per litre, and overcoat within 8 to 24 hours. Megapoxy MC can be thinned up to 10% with Megapoxy Thinners on the first coat, and 5% on the second coat, to improve workability. All thinners must evaporate before applying the next coat. Use Megapoxy Thinners to clean tools and mixing equipment immediately after use.