Which application technique is generally used for fillers?

The technique of applying fillers with a trowel or squeegee is often chosen because these tools allow for better control and manipulation of thicker materials that are common in filler applications. Fillers need to be spread evenly and firmly to ensure they properly fill gaps, cracks, or surface imperfections. A trowel, in particular, provides the necessary pressure and angle to achieve a smooth finish, while a squeegee can help push the material into the substrate effectively.

Brushing, spraying, and rolling are generally more suitable for paint or thinner materials rather than fillers. These methods can lead to uneven application or a failure to adequately fill the intended areas. For instance, brushing may leave behind visible brush marks, and spraying can oversaturate surfaces, which is not desirable for materials like fillers that need to adhere well to the surface being repaired. Therefore, the trowel or squeegee method is preferred when working with fillers to ensure a professional and effective finish.