ProSource

ProSource putty knives are for spreading filler and scraping during repairs, whether you’re fixing your own house or working for a customer. Stiff, flexible and plastic choices let you match the blade to the work, with plastic widths reaching 6 inches.

ProSource is a tool brand with putty knives and scrapers. Its putty knives include stiff, flexible and plastic versions. The line also includes a 3-inch stiff drywall joint taping knife.

Its hardware products include padlocks, casters and furniture glides. Automotive products include tie-downs, stretch cords and tow straps. Plumbing products include water meter keys, hose clamps and couplings. Door hardware includes locksets, deadbolts and latch guards. Lawn and garden products include tarps and hand trucks.

Stiff for scraping, flexible for spreading

Choose a stiff blade when the job needs scraping pressure. It resists bending as you push. ProSource’s stiff putty-knife choices reach 3 inches wide. For scraping, stiffness comes first.

A flexible blade bends under pressure so you can draw filler out toward the edge of a patch. ProSource offers nylon flexible putty knives in 1-1/4-, 1-1/2- and 2-inch widths. For a repair that needs scraping and filling, both blade actions are useful: scrape first, clear away the debris, then spread the filler with the flexible blade.

Ridges often start with too much filler or dried material on the blade edge. Keep the edge clean, spread a small amount, and ease the pressure as you reach the edge of the patch.

Width that fits the repair

There’s a wider plastic option: ProSource offers a 6-inch plastic putty knife, along with a 4-inch version. The smaller plastic choices are 1-1/2, 2 and 3 inches wide. For the 4- and 6-inch putty knives, plastic is the choice in this range.

A narrow blade gives you room to work beside trim. ProSource offers both stiff and flexible putty knives in 1-1/4- and 1-1/2-inch widths. Choose a width that lets you finish the stroke without bumping the adjacent trim.

Plastic is worth considering when protecting a finished surface matters. Grit caught under any blade can scratch, so clear the loose debris and try the blade in an inconspicuous spot.

For drywall work, ProSource also offers a 3-inch stiff joint taping knife. Its narrow width suits confined spreading work; match the blade to the working room and the area you’re covering.

Putty-knife sizes and blade choices

Knife type	Widths
Nylon stiff putty knife	1-1/4, 1-1/2 and 2 inches
Nylon flexible putty knife	1-1/4, 1-1/2 and 2 inches
Stiff putty knife	1-1/4, 1-1/2 and 3 inches
Flexible putty knife	1-1/4 and 1-1/2 inches
Plastic putty knife	1-1/2, 2, 3, 4 and 6 inches
Stiff drywall joint taping knife	3 inches

Frequently Asked Questions

What are ProSource putty knives used for?

ProSource putty knives are made for spreading filler and scraping during repairs. Use a stiff blade to remove stuck material, then switch to a flexible blade to spread filler smoothly.

What’s the difference between a stiff and flexible ProSource putty knife?

A stiff ProSource putty knife resists bending when you apply scraping pressure. A flexible blade bends as you spread filler, helping you draw it toward the edge of a patch. Match the blade action to the job before choosing the width.

What sizes do ProSource plastic putty knives come in?

ProSource plastic putty knives come in 1-1/2, 2, 3, 4 and 6-inch widths. Choose a narrow blade when you’re working beside trim and a wider blade when you have room for a longer spreading stroke.

Can you use a ProSource putty knife on a finished surface?

A plastic ProSource putty knife is worth considering when protecting a finished surface matters. Clear away loose grit first, since debris caught beneath any blade can scratch, and test the blade in an inconspicuous spot before working across the surface.