Dryobalanops rappa is a species of plant in the family Dipterocarpaceae.

It is found in at least one protected area (Gunung Mulu National Park), but is threatened elsewhere due to habitat loss.

[2] The IUCN has assessed the species as endangered due to habitat damage by deforestation, mining, agriculture and fires.

[1] It is an emergent tree, up to 55 m tall, found in coastal mixed peat swamp forest and in lower montane kerangas forests.

[2] It is a heavy hardwood sold under the trade names of Kapur.