Achieving high-strength, permanent bonds between diverse construction materials presents a unique challenge. Standard fillers often sag, lack robust adhesion, or fail in demanding conditions. Megapoxy PM delivers a purpose-built solution: a non-sag, two-part epoxy paste for structural bonding and filling across concrete, metal, stone, and fibreglass, ensuring integrity even in cold and damp environments.

Why this product exists

Megapoxy PM is formulated to provide an unyielding, permanent bond and structural repair where standard adhesives or fillers fall short. This non-sag epoxy paste maintains its form on vertical and overhead surfaces, making it ideal for critical applications requiring precision and strength superior to concrete. It adheres and cures under adverse conditions, including cold and damp environments, extending its usability on challenging job sites.

The numbers that matter

  • Compressive Strength: 80 MPa. This value, measured to ASTM D695-23, confirms a cured strength significantly greater than most structural concrete, providing a permanent fix that rebuilds structural integrity.
  • Tensile Bond Strength to Steel: 20 MPa. Tested to ASTM D897-08, this high bond strength ensures reliable anchoring and secure connections when bonding metal components to concrete or other substrates.
  • Hardness: 86 Shore D. This high Shore D hardness rating indicates a rigid, durable cure, making it suitable for load-bearing applications and areas subject to abrasion or impact.
  • Modulus of Elasticity: 2 GPa. A high modulus signifies a rigid, unyielding material. This means Megapoxy PM forms a stiff bond or filler, transmitting loads effectively and preventing movement in bonded structural elements.

What it's like to use

Megapoxy PM mixes at a straightforward 1:1 ratio by volume. Once mixed, it offers a 45-minute work time at 25°C, providing ample opportunity for precise placement. Apply it at temperatures no lower than 10°C. Cure time is temperature-dependent, ranging from 48 hours at 15°C to 12 hours at 35°C. For optimal adhesion, prepare surfaces meticulously: grit blast metal to AS CK 9.4 Class 3 and mechanically abrade or acid etch concrete to remove laitance. Ensure all existing coatings are removed as they compromise bond strength. Clean tools and excess material with Megapoxy Thinners.

Where this product excels

  • Civil Construction & Concrete Repair: For structural concrete repairs on floors, stairs, columns, pipes, and tanks, where superior-to-concrete strength is required. It's also specified for sealing and filling cracks and acting as an adhesive for joint bands in concrete detailing.
  • Stone & Tiling: Ensures non-staining, permanent bonds for natural stones like marble and granite, as well as ceramics and bricks. This is critical for maintaining the aesthetic integrity of high-value finishes.
  • Marine & Fibreglass Applications: Provides a high-strength, gap-filling adhesive for manufacturing and repairing fibreglass articles. Its ability to cure in damp conditions is an advantage for marine environments.
  • Metalwork & Engineering: Ideal for grouting bolts, or permanently bonding metal components to concrete or other metal structures, leveraging its high tensile bond strength to steel.

How it fits in a real system

Megapoxy PM frequently serves as the final, rigid component in multi-stage crack and joint treatment detailing systems. After initial preparation and often after applying a flexible sealant like Adheseal PU25, Megapoxy PM is applied to adhere joint bands, seal cracks rigidly, or cap injection ports. This positioning ensures a robust, permanent closure or bond, completing the structural repair sequence with a material designed for strength and durability. Within concrete membrane and tiled systems, it acts as a rigid filler for gaps or cracks before subsequent layers.

Choose this when

  • When you require a high-strength, permanent, and rigid bond between diverse materials such as concrete, metal, natural stone, or fibreglass.
  • When the application demands a non-sag paste for vertical or overhead bonding and filling, preventing slump or flow during cure.
  • When performing structural repairs on concrete elements like floors, stairs, or columns, where the repair material must be stronger than the surrounding concrete.
  • When working in conditions that are cold or damp (down to 10°C), where other epoxies may struggle to cure effectively.
  • When the job involves crack and joint treatment detailing and repair, serving as an adhesive for joint bands or a rigid crack sealer.

Don't use this when

  • Not for: Low-viscosity injection into fine cracks; this product is a paste, better suited for filling larger gaps or surface applications. For fine crack injection, consider Megapoxy HX Epoxy Resin.
  • Not for: Flexible joint sealing; Megapoxy PM cures rigidly with a high Shore D hardness (86) and a high modulus of elasticity. For flexible joints, a product like Adheseal PU25 Fast-Cure Polyurethane Sealant is a better fit.
  • Not for: Bonding to existing coatings without prior removal. Adhesion will be compromised; all coatings must be removed for optimal bond strength.
  • Not for: Use as a fast epoxy port adhesive; for faster setting times in similar applications, review Megapoxy PF Epoxy Adhesive.