Magos Genetus Iyrzek (attached to the Mechanicus forces of the Achilus Crusade in the Jericho Reach) synthesised Infiltriol, which takes advantage of the strong scent receptors common in most Tyranids. Infiltriol uses essential pheromones extracted from members of the gaunt genus to mask the bio-signature of the subject receiving an application of this substance. Infiltriol is formulated for the chem-receptors of Hive Fleet Dagon only. It is currently completely unknown how it could be created for other Hive Fleets. When a Space Marine's power armour is treated with Infiltriol enamel, most Tyranid organisms do not recognize him as an enemy. This allows him to walk through areas teeming with brood organisms, relatively unimpeded. However, drawing too close to more intelligent and perceptive species such as synapse creatures or vanguard organisms risks revealing the deception and bringing down the Tyranids' wrath upon the intruder.

基因贤者伊尔泽克（隶属于杰里科河段阿基里斯远征的机械神教部队）合成了渗透珐琅，它利用了大多数泰伦常见的强烈气味受体。渗透珐琅使用从兵虫成员中提取的基本信息素来掩盖接受该物质使用的使用者的生物特征。渗透珐琅仅用于达贡虫巢舰队的化学受体。目前完全不知道如何为其他虫巢舰队创建它。当一名星际战士的动力装甲被涂上渗透珐琅时，大多数泰伦生物都不会把他当作敌人。这使他能够相对不受阻碍地穿过充满泰伦生物的区域。然而，过于接近更聪明和更具感知力的物种，如突触生物或先锋生物，可能会暴露这种欺骗行为，并招致泰伦虫族对入侵者的愤怒。

The wearer must be inside an environmentally sealed unit (such as Astartes power armour) for the enamel to be effective. While bio-masked, a character does not warrant notice by members of the applicable Hive Fleet, remaining effectively "invisible" as long as he does not approach too close to a Tyranid creature. If the wielder is discovered by any Tyranid creature, or any attack on a member of the Hive Fleet, it automatically reveals the wielder to all Tyranids in sight. Naturally, psi-active Tyranids (such as Hive Tyrants) are rarely fooled by such a deception.

穿戴者必须在一个环境密封的单元内（如阿斯塔特动力装甲），珐琅才能有效。 当使用生物面具进行伪装时，该角色不会引起相应虫巢舰队成员的注意，只要他不太过接近泰伦生物，就会保持实际上的“隐形”状态。如果使用者被任何泰伦生物发现，或者对蜂巢舰队成员的任何攻击，它会自动将持有者暴露给视野内的所有泰伦虫族。当然，具有灵能的泰伦虫族（比如虫巢暴君）很少会被这种欺骗所迷惑。