Kilz vs Sherwin-Williams Primer: Price, Tint & Which to Buy
Kilz Original is an oil-based, stain-blocking primer that runs $16–$33 a gallon — Sherwin-Williams’ tintable Extreme Block Waterbased primer costs nearly triple, close to $90 a gallon. Buying the wrong one means an extra coat, a mismatched sheen, or a primer that can’t seal true smoke or water stains. This guide compares real specs and pricing, tells you which one to buy for stain-blocking versus color-matched topcoats, and answers whether Sherwin-Williams stores even carry Kilz.
This post contains affiliate links. As an Amazon Associate, we earn from qualifying purchases — see our affiliate disclosure for details.
Quick Answer
Use KILZ Original for budget stain and odor blocking on old walls, ceilings, or wood — it costs a third of the price. Upgrade to Sherwin-Williams Extreme Block Waterbased when you need a tintable primer with a lifetime limited warranty, such as a high-traffic rental or a resale-value repaint. Neither replaces the other — pick based on stain severity and whether you need color-matched priming.
Primer Basics: Why You Can’t Skip This Step
Primer seals porous or stained surfaces so topcoat paint adheres evenly and doesn’t soak in unevenly. Oil-based and shellac primers block the toughest stains — water rings, smoke, tannin bleed from wood — while water-based primers dry faster and clean up with soap and water. Skipping primer on a stained or bare surface is the single most common reason a repaint job needs a second full coat of expensive finish paint.
Kilz Primer Overview
Masterchem Industries introduced the KILZ brand in 1974. The brand changed ownership twice before becoming part of Behr Paint Company, a Masco Corporation subsidiary in 2000. Kilz built its reputation on stain-blocking, not on color-matching or specialized surface formulas.
- Stain Blocking: Seals water, smoke, and tannin stains so they don’t bleed through new paint.
- Odor Blocking: Reduces smoke and pet odor before repainting.
- Fast Drying: Most Kilz formulas are recoatable within about an hour.
- One-Size-Fits-Most: A single formula (Original, Kilz 2, or Kilz 3) covers most interior jobs rather than a surface-specific line.
Sherwin-Williams Primer Overview
Sherwin-Williams has sold paint since 1866 from its original Cleveland, Ohio storefront. Unlike Kilz’s one-size-fits-most approach, Sherwin-Williams sells a formulated line — PrepRite for drywall, ProBlock for maximum stain sealing, and Extreme Block for the toughest smoke and water stains. Sherwin-Williams primer is sold as a separate product from their paint — if you already own Sherwin-Williams paint, see whether Sherwin-Williams paint already contains primer before buying a standalone can. The waterbased Extreme Block formula is tintable to any topcoat color and carries Sherwin-Williams’ Stain Locking and Odor Block Technology plus a lifetime limited warranty.
Kilz vs Sherwin-Williams Primer: Spec Comparison
The table below compares KILZ Original against Sherwin-Williams Extreme Block Waterbased — the two products people searching “kilz primer comparison chart” are usually trying to line up side by side.
| Feature | KILZ Original | SW Extreme Block (Waterbased) | Best For |
|---|---|---|---|
| Base type | Oil-based (Kilz 2/3 also water-based) | Water-based (alkyd version also sold) | Match to your existing paint system |
| Tintable | No — prime white, then topcoat | Yes | SW, for fewer finish coats on dark colors |
| Approx. price (1 gal, 2026) | $16–$33 | ~$90 (list) | Kilz, for budget-limited jobs |
| Stain/odor tech | General stain and odor blocking | Stain Locking + Odor Block Technology | SW, for smoke/pet-odor jobs needing a warranty |
| Warranty | Standard manufacturer warranty | Lifetime limited warranty | SW, for resale or rental-grade jobs |
📊 KILZ was introduced in 1974 by Masterchem Industries and is now manufactured by Behr, a Masco Corporation brand. — Source: Behr corporate news, 2026
Best Budget Stain-Blocking Pick
KILZ Original Low-Odor Interior Primer (1 Qt) – $27.61
The same low-odor Kilz Original formula covered in the spec table above — a 1-quart size is enough to spot-prime one stained wall or ceiling patch before repainting.
- Best for: Small stain-blocking jobs and touch-ups
- Why we picked it: Matches the budget Kilz option in this guide’s comparison table
- Main drawback: Not tintable — needs a topcoat for color
Compare more stain-blocking primer options
 Option 1 KILZ Original Aerosol Primer (6-Pack) – $49.95
|
 Option 2 Zinsser Bulls Eye 1-2-3 Primer & Sealer (Qt) – $9.55
|
 Option 3 Rust-Oleum Zinsser Cover-Stain Primer Spray – $10.65
|
As an Amazon Associate we earn from qualifying purchases.
How to Prep and Apply Either Primer
Both Kilz and Sherwin-Williams primers fail the same way when surface prep is skipped — the primer seals dirt or grease into the wall instead of the stain. Follow these steps whichever brand you choose. If you’re priming new drywall, skip step 2 (patching) unless seams need it.
- Clean the surface: Wash with soap and water to remove dirt, grease, and dust, then let it dry fully.
- Patch and sand: Fill cracks or holes with filler, sand smooth, then wipe away dust with a damp cloth.
- Choose your tool: Use a brush for trim and corners, a roller for large wall areas, and a sprayer only if you can control overspray.
- Apply one even coat: Work in thin layers — a heavy single coat traps solvent and takes longer to cure than two thin ones.
- Let it fully cure before topcoating: Most Kilz and Sherwin-Williams formulas are recoatable in about an hour, but let oil-based versions cure overnight in humid conditions.
Real Cost Comparison
KILZ Original 1-gallon cans list for roughly $16.49–$32.98 depending on the formula and retailer, based on current Home Depot listings. Sherwin-Williams Extreme Block Waterbased lists close to $90 a gallon before any contractor or store discount — nearly triple the Kilz price. That gap narrows if you only need a quart for a small patch, but for a whole-room repaint the price difference is real money, not a marketing exaggeration.
The premium buys two things Kilz doesn’t offer on this specific formula: a tintable base (fewer topcoats on dark colors) and a lifetime limited warranty. If you’re priming a rental unit you’ll repaint again in two years, that warranty has little value. If you’re prepping a home for resale, it can matter to a buyer’s inspection.
Environmental Considerations
Both brands sell low-VOC formulas. Kilz’s low-odor and low-VOC lines cut the sharp smell common to older oil-based primers, and Sherwin-Williams offers waterbased Extreme Block specifically to reduce VOC output compared to its alkyd version. Neither brand’s low-VOC line sacrifices stain-blocking performance — the tradeoff is dry time, not coverage.
VOC Content and Indoor Air Quality
VOCs (volatile organic compounds) off-gas as primer cures and can affect indoor air quality in poorly ventilated rooms. Low-VOC Kilz and Sherwin-Williams waterbased formulas both reduce this, but oil-based versions of either brand still carry higher VOC content — ventilate the room and, if possible, prime a day before you’ll be sleeping in that space.
“Primers are one of the most overlooked components of a paint job. If we have some stubborn stains, we like a natural-white-pigmented shellac to lock them down before topcoating.”
Choosing the Right Primer for Your Project
Pick Kilz Original when you’re blocking a specific stain — smoke, water rings, tannin bleed — on a budget, and you don’t need the primer itself tinted. Pick Sherwin-Williams Extreme Block Waterbased when you need one tintable coat under a color topcoat, or when a lifetime warranty matters for a higher-value job. If you’re priming bare new drywall rather than covering a stain, check whether a paint-and-primer-in-one product is enough instead of a dedicated primer coat.
For general painting prep and priming guides beyond just these two brands, see our full painting tips hub.
Frequently Asked Questions
What Is the Sherwin-Williams Equivalent to Kilz?
Sherwin-Williams’ closest equivalent to Kilz is its Extreme Block primer line. It provides strong stain-blocking and adhesion for water, smoke, and tannin stains, and comes in both waterbased (tintable) and alkyd versions for interior and exterior use.
What’s Better Than Kilz?
No primer is universally “better” — it depends on the stain. Zinsser Bulls Eye 1-2-3 and Cover-Stain are often rated ahead of Kilz for mold and mildew resistance and quick-drying performance, while Sherwin-Williams Extreme Block edges it out for tintability and warranty backing.
What Is the Best Brand for Paint Primer?
Kilz, Zinsser, and Sherwin-Williams are the three most-recommended primer brands. Choose Kilz or Zinsser for budget stain-blocking, and Sherwin-Williams when you need a tintable, surface-specific formula backed by a lifetime warranty.
Is Kilz a High-Quality Primer?
Yes. Kilz Original reliably blocks stains, odors, and seals porous surfaces, and professional painters have relied on it since 1974. It isn’t tintable and doesn’t offer the surface-specific formulas Sherwin-Williams does, but for straightforward stain-blocking it performs as well as pricier alternatives.
Does Sherwin-Williams Sell Kilz Primer?
No. Sherwin-Williams stores only sell Sherwin-Williams-branded primers, including PrepRite, ProBlock, and Extreme Block. Kilz is a Behr/Masco brand sold at Home Depot, Lowe’s, Walmart, and Amazon, not through Sherwin-Williams retail locations.
Can Kilz Primer Be Tinted?
No, standard Kilz Original is sold in white and cannot be tinted to a topcoat color. If you need a tintable primer to cut down on finish coats, Sherwin-Williams’ waterbased Extreme Block is formulated to accept tint; Kilz must be primed white and then topcoated separately.
How Long Does Each Primer Take to Dry Before Painting?
Both Kilz and Sherwin-Williams waterbased primers are typically recoatable within about an hour under normal humidity. Oil-based versions of either brand dry to the touch faster but should cure longer — ideally overnight — in humid or poorly ventilated rooms before topcoating.
Conclusion
Kilz and Sherwin-Williams primers solve different problems at different price points. Kilz Original blocks stains for a third of the cost but stays white and untintable. Sherwin-Williams Extreme Block costs more but tints to your topcoat and carries a lifetime warranty. Match the primer to the stain you’re covering and the budget for the job, not to brand loyalty alone.
