又称分散能力。在电泳涂漆时，涂料对被涂物的内表面、凹穴处及背面的涂覆能力。一般以试条上电泳漆高度（厘米）表示。也是使复杂被涂物所有表面能否涂上均匀漆膜的能力。
电泳漆膜电阻高，则泳透力就好。
Electrocoated films having a high electrical resistance exhibit good throwing power.
气体的产生消耗电流引致泳透力下降，则不可能使隐蔽表面涂上漆。
Throwpower drops off as current is consumed in the production of gas and is not available to permit the covering of recessed areas.
阴极电泳涂料由于其优异的耐蚀性能、的泳透力和库仓效率而广泛用作防锈底漆。
Cathodic electrophoretic coatings have been widely used as antirust undercoat for their excellent corrosion resistance high electrophoretic force and coulomb efficiency.
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