Skip to content
NewWalk our hardware store, aisle by aisleWalk our store ● Step inside ● Get the app
Shop Your Local Store ● Ship to Your Hometown Store
Pro & Contractor Accounts ● Apply for Net Terms
100,000+ Products ● Trusted Authentic Brands
FAQ Shipping & Returns Order Lookup Contact Account
Shop the Collection
Shop Local. Support Independent. 9 products available

Paint Conditioner & Hardener

Conditioners and hardeners for working with paint. Flood Floetrol is a clear additive for latex paint, and Penetrol is a solvent-based additive. Hardeners from Sunnyside, Krud Kutter, Cobzorb and Homax are for leftove...

Trusted brands only Ships nationwide Pro accounts welcome Support your local hardware store
9 products
Sunnyside M-1 Paint Hardener 4.7 oz

Sunnyside

Sunnyside M-1 Paint Hardener 4.7 oz

MPN: 79205M

$6.99
Flood Penetrol Light Aliphatic Solvent Naphtha Paint Additive 1 gal
USA
In-Store

Flood

Flood Penetrol Light Aliphatic Solvent Naphtha Paint Additive 1 gal

MPN: FLD4-01

Check with your local store Sold in stores — they stock it, price it fair, stand behind it.
Find a Local Dealer
Flood Penetrol Light Aliphatic Solvent Naphtha Paint Additive 1 qt
6 per case USA

Flood

Flood Penetrol Light Aliphatic Solvent Naphtha Paint Additive 1 qt

MPN: FLD4-04

$95.94
Save 15% at $75+ Case of 6
Flood Floetrol Clear Latex Paint Additive 1 qt
USA

Flood

Flood Floetrol Clear Latex Paint Additive 1 qt

MPN: FLD6-04

$11.99
Krud Kutter Liquid Paint Hardener
USA

Krud Kutter

Krud Kutter Liquid Paint Hardener

MPN: PH3512

$6.99
CobZorb Paint Hardeners 16 oz
USA

Cobzorb

CobZorb Paint Hardeners 16 oz

MPN: CZ100003

$6.99
CobZorb Paint Hardeners 3 lb
USA

Cobzorb

CobZorb Paint Hardeners 3 lb

MPN: CZBPNT

$11.99
Homax Paint Hardeners 3.5 oz
12 per case

Homax

Homax Paint Hardeners 3.5 oz

MPN: 3535

$47.88
Save 15% at $75+ Case of 12
Flood Floetrol Clear Latex Paint Additive 1 gal
4 per case USA

Flood

Flood Floetrol Clear Latex Paint Additive 1 gal

MPN: FLD6-01

$71.96
Save 15% at $75+ Case of 4

More About This Collection Paint Conditioner & Hardener

Conditioners and hardeners for working with paint. Flood Floetrol is a clear additive for latex paint, and Penetrol is a solvent-based additive. Hardeners from Sunnyside, Krud Kutter, Cobzorb and Homax are for leftover paint.

Read the label for which type of paint each one suits.

National Hardware Group · Sourced directly through authorized manufacturer channels — the trusted brands your neighborhood hardware store carries. Learn how we keep the local store on the corner →

Shop Local

Find these products at your local store.

Independent hardware retailers often carry the same products — sometimes at competitive prices. Every order helps keep them on the corner.

Why we built NHG →
For Pros & Businesses

Buying for a business? Get the pro treatment.

  • Net 30 terms
  • Volume & contract pricing
  • Gov & compliance ready
Apply for a Pro Account
Need a hand?

Real people. Real hardware experience.

Questions about fit, compatibility, or job requirements? Reach a real person — not a chatbot or contracted call center.

(866) 469-8556 Mon–Fri, 6 AM–5 PM PST Text (425) 515-2727 24/7 intake · next business day reply Send a message Routed to the right team based on your inquiry

Ask our counter. Or theirs.

Most hardware stores can do more than you think. If we can't help you, the folks down the street probably can — just ask at the counter.

What we offer
Shop Your Local Store Ship to your hometown store
Pro & Gov Accounts Net terms · tax-exempt
Ships Nationwide Direct to your door
Shop Local First Real hardware stores
$0.68 of every dollar spent at a local independent business stays in the community. At a national chain, it's about fifteen cents. Civic Economics, multi-city retail studies
100% Authorized & Genuine — Our Guarantee →
Their Counter
Try local first · we'll wait

The stores we send you to are local and independently run — often for generations, the kind of place where someone behind the counter knows the regulars. We don't own them. We just think they deserve the foot traffic. They can put most of what we sell on their next truck. Ask there before you check out here.

Find a local store →
Mon–Fri 6–5 PST
Independent hardware retailer? Join the network → Make hardware content? Earn 6% as a creator →
About our directory. National Hardware Group is an independent retailer and directory. The local stores we list and link to are separately owned and operated — we have no ownership stake in any of them, and most pay us nothing to be included. That includes plenty of stores flying a familiar banner that people don't realize are locally owned and run, not operated by a corporation. Store owners can choose to upgrade their listing for an enhanced presence or pickup features, but the base directory is free, and inclusion is never a paid endorsement.

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare