Huntsman Fillers

What Are Huntsman Fillers?

Huntsman Epocast syntactic and filler compounds are pre-formulated systems engineered for lightweight structural reinforcement, honeycomb splicing, and void filling. They combine epoxy resin with hollow microspheres, producing a low-density, high-strength material. A syntactic compound adds strength and fills space without the weight of a solid resin pour.

Why Choose Huntsman Fillers?

Epocast syntactic compounds are engineered for structural roles where weight is a constraint — aerospace manufacturing, composite repair, and honeycomb construction. The hollow microsphere matrix delivers high strength at low density, making them the correct choice over solid epoxy or general-purpose body fillers where load-bearing performance and weight savings are both required.

Epocast 1618 D/B — High strength, excellent adhesion to composites and metals, durable under stress.

Epocast 1629 A/B — High compressive strength, chemical resistance, long aerospace service history.

What Are the Best Applications for Huntsman Fillers?

Epocast 1618 D/B — Structural reinforcement, composite repair, aerospace bonding.

Epocast 1629 A/B — Metal-to-metal bonding, void filling, honeycomb reinforcement.

Both are well suited to honeycomb splicing and filling voids in lightweight structures. For paste adhesives see Epocast 1652; for laminating and casting resins see the Huntsman Epocast resin line.

How Should Huntsman Fillers Be Used for Best Results?

Two-part epoxy systems supplied in gallon kits. Mix and apply to clean, prepared surfaces or directly into the void or honeycomb being reinforced. Follow the manufacturer data sheet for mix ratio, cure schedule, and handling.

Available Products & SKUs

• Epocast 1618 D/B — Gallon Kit
• Epocast 1629 A/B — Gallon Kit

Every product Fibre Glast sells is First Quality Guaranteed, so you can reinforce and fill aerospace structures with confidence.