Thick, heavily pigmented materials are applied to fill voids in which type of substrates?

Thick, heavily pigmented materials are particularly well-suited for filling voids in concrete or masonry substrates due to the porous nature and texture of these materials. Concrete and masonry often have a variety of imperfections, such as holes, cracks, or uneven surfaces that need to be addressed to achieve a smooth finish.

The use of these thick materials not only helps to fill in the voids but also enhances the color and provides a uniform appearance across the surface. They are often used in conjunction with concrete repair products or primers that are specifically designed to bond well to the rough textures of concrete and masonry.

In contrast, wood substrates typically require a different approach, such as the use of wood fillers or putties that are better suited for the natural grain and expansion of wood. Plastic substrates may need flexible fillers to accommodate changes in shape, and metal substrates often rely more on rust-inhibiting primers and paints rather than thick fill materials. Thus, the properties of concrete and masonry make them the ideal candidates for the application of thick, heavily pigmented filling materials.