West System 411 Microsphere Blend Filleting Filler

Fillers extend the versatility of epoxy by modifying its consistency to suit a wide range of tasks. Each filler has distinct physical properties, but they are typically classified into two main types: Adhesive (high-density) and Fairing (low-density).

Adhesive fillers produce strong, high-density mixtures that cure into a tough, hard-to-sand material—ideal for structural applications such as bonding, filleting, and securing hardware.

Fairing fillers create lightweight, low-density blends that cure to a soft, easily sandable finish, making them well-suited for cosmetic or surface work like shaping, filling, and fairing.