Resak

Vatica spp.

Very heavy and strong species for heavy-duty structures, including marine applications. Due to its exceptional hardness, resak is used for mallets, moulds and workbench tops that withstand impact loads.

Resak (Vatica spp.) occupies a unique position among SE Asian hardwoods — it is simultaneously one of the heaviest (870–1,100 kg/m³) and one of the most naturally durable (EN 350 Class 1–2) species available in the regional market. These properties make it the specification of choice for applications subject to sustained mechanical stress, impact loading and marine exposure: harbour pilings, marine fenders, bridge support components and industrial workbenches designed to absorb repeated heavy impacts. The wood's extreme hardness (Janka ~14,000 N) makes machining very demanding — carbide-tipped tooling and slow feed rates are required — but the resulting surfaces are highly wear-resistant and structurally reliable.

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Technical Specifications

Full Species Reference

Property	Value
Botanical Name	Vatica spp.
Density (12% MC)	Very high kg/m³
Janka Hardness	~14,000 N
EN 350 Durability Class	Class 1–2
Durability Rating	Excellent
Recommended Environment	Outdoor / Heavy-duty
Primary Applications	Marine structures, mallets, moulds, workbench tops

Where It Is Specified

Applications of Resak

Marine structures & pilings
Industrial workbench tops
Mallets & impact tools
Bridge & dock construction
Heavy-duty outdoor structures

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