Technical Data


Black Label® is one of the most highly regarded natural decking materials. As a completely natural product, it is an eco-friendly choice. Its strength, hardness, and beauty make it excellent for outdoor decking and siding applications. Black Label® wood is resistant to rot, insect attack, mold, and even marine borers – exceptional attributes that do not require toxic chemical treatments.

Black Label® wood is naturally fire-resistant and is rated A1 for its fire resistance. The wood has high wear durability and resists splinters and checks. It is not uncommon to see Black Label® wood decks last 70+ years!

Tropical Forest Products sources Black Label® wood from forests that have been legally restricted for lumber. Our lumber is certified at source and during shipping by an independent third party.


Names: Black Label®, Brazilian Walnut, Lapacho

Scientific name: Handroanthus spp.

Weight: 1,100 kg/m3 (69 lbs/ft3)

Specific gravity: 91 (basic), 1.10 (12% MC)

Janka Hardness: 15,620 N (3,510 lbf)

Hardness: A Black Label® deck is approximately three times stronger than teak and eight times harder than California Redwood, as tested under ASTM-D143.

Expansion and Contraction: Approximately 5.9% radial, 7.2% tangential, and 12% volumetric. A 6” air-dried board will move an average of 1/16”. There is a small movement after milling as well.

Fire resistance: In Canada, the Black Label® decking board has passed the Intermittent Flame Test and The Spread of Flame Test for the CAN/ULC S107 equivalent of ANSI /UL 790 (Standard Methods of Fire Tests of Roof Coverings) and is rated Class A. This makes it suitable for a rooftop finishing material in non-combustible building class buildings, putting it in the same class as steel. In the U.S., Black Label® wood has been tested by the National Fire Protection Agency, which gave it the highest Flame spread classification: Up to Class A, Uniform Building Code, Class 1.

Termite resistance: Black Label® has received the highest rating from the U.S. Naval Research Laboratory.

Durability and longevity: Untreated Black Label® decking will last 40 years and more. If the deck is oiled or finished on all four sides before installation, it can last 70+ years.

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