West System 404 High Density Filler Additive


A high density filler additive that creates a smooth paste and hard compound for lamination and installation of hardware items.

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The West System 404 High Density Filler Additive is suited for the toughest of bonding applications. With its high-density formulation, this filler additive is perfect for applications that require superior strength and durability. It is specifically engineered to mix easily with the epoxy products from West System delivering a smooth, easily workable paste that sets very hard. This versatile additive can be used for bonding, filleting, gap filling, lamination and hardware installation.

Recommended Applications

  • For creating tough laminations in both wood and composites
  • Filling and fairing both above and below the waterline
  • Installation of hardware pads
  • Creating threaded screw pockets
  • Fiberglass repairs
  • Marine and autobody repairs

Additional information

Pack Size

S Pack (150g), A Pack (1.75kg), B Pack (10kg)