Rubberwood (Hevea brasiliensis) is very important but it is susceptible to various wood degrading agents. To ensure the effective protection of rubberwood, arsenic free Tanalith-E (An AWPA CBA-A: Copper Azole- Type A composing Copper, Boron and Tebuconazole) preservative has been used through dipping process. It is found that the penetration of copper and boron in rubberwood is more distinctive and the maximum retention of Tanalith-E in rubberwood is 13.37 kg/m3 for 3% concentration at 72 hours dipping duration and the minimum retention is 9.90 kg/m3 for 1% concentration at 24 hours dipping duration. It is obvious that Tanalith-E can be a preservative for treating rubberwood.

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