How to Identify Jack Wood
Spot Jack Wood (Sal) by its warm tan to reddish-brown color, coarse resinous texture, heavy hard feel, and open-pored end grain.
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Start with color and texture. Jack Wood presents as a warm tan to light brown board when freshly worked, deepening toward reddish- or golden-brown with age and exposure, over a paler and only moderately distinct sapwood. The grain runs straight to somewhat interlocked, so quartersawn faces show a soft, broken ribbon while flatsawn faces read as a fairly even brown with a medium figure — as seen on our sample. The texture is distinctly coarse and the surface has a low-to-moderate luster rather than a bright sheen.
Work the end grain and pores. Jack Wood is a diffuse-porous hardwood with medium-to-large, well-spaced pores that are easily seen without a lens, often with a resinous or gummy content. That coarse, open, somewhat greasy-looking end grain, together with the wood's obvious resin, is a good tell — a freshly cut face may smell faintly resinous and can feel slightly tacky where resin is present.
Judge weight and hardness. Jack Wood is heavy and hard in the hand (around 800–880 kg/m³, Janka ~1,400 lbf). It resists a thumbnail dent, feels noticeably denser than temperate oak or ash, and hits like a structural timber rather than a light utility wood — the heft alone rules out many lighter look-alikes.
Separating it from confusables is mostly about pore pattern, weight and provenance. The most common confusion is with the bulk meranti / lauan / seraya group, which are other Shorea species — those tend to be lighter in weight, softer, and more openly coarse, and are usually sold as cheap plywood-grade or utility stock, whereas true Sal is markedly heavier and harder. Teak can look similar in color but is oilier to the touch, has a distinct leathery scent and a greasy feel, and is lighter for its stiffness. Keruing (Dipterocarpus), a close relative, is also heavy and resinous but is typically more grey- to pinkish-brown and even more prone to weeping resin. When color and weight are ambiguous, the coarse resinous end grain plus the wood's regional origin (South/Southeast Asian Sal-forest belt) are the deciding clues.
Frequently asked questions
What is the single best clue that a board is Jack Wood?
A heavy, hard tan-to-reddish-brown board with a coarse, open, resinous end grain and a straight-to-interlocked grain. The combination of real weight, coarse texture and obvious resin content is the standout diagnostic.
How do I tell Jack Wood from meranti or lauan?
Meranti, lauan and seraya are other Shorea species but are generally lighter, softer and coarser utility woods, often plywood-grade. True Jack Wood (Sal) is distinctly heavier and harder in the hand, so weight and density are the quickest separators.
Can Jack Wood be confused with teak?
In color, yes, but teak is oilier and greasy to the touch with a characteristic leathery scent, and is lighter for its stiffness. Jack Wood is denser, coarser and resinous rather than oily, which usually settles it.
Does Jack Wood have a distinctive smell?
A freshly cut face is often faintly resinous rather than sweet or aromatic, reflecting the wood's resin content. A strongly fragrant or perfumed board is more likely another species, so lean on weight, coarse texture and the resinous open pores.