Bullshardware offers effective exterior primers and fillers online that protect, adhere, and last more than the regular primers. Our primer's most crucial function is to provide a smoother surface upon which the paint glides. Create a smooth canvas before painting with the most premium exterior primers and fillers at Bullshardware. Primers are applied before paint to increase the durability and stability of the material and ensure better paint adhesion. Preparatory coatings such as primers are used before painting.