Why do we choose foam paint roller?

The benefit of using foam paint roller is that it absorbs liquids easily, and when the outer surface of the foam is smooth, it redistributes that same liquid evenly. In the painting world, thin paints absorb well, so varieties like water-based paints and latex work ideally with foam rollers.

On the other hand, oil-based paints tend to be thicker and more syrupy than liquid-like. Try to avoid using foam paint rollers with oil-based paints, as they likely won't absorb as completely or as evenly, thus negatively impacting the finished paint job.