The ultimate stain blockers for wood are shellac-based or oil-based primers. They create a dense, impermeable barrier that prevents wood tannins, water rings, marker, and smoke from bleeding through to your paint.
The absolute best stain-blocking primers for covering stubborn water rings, smoke damage, pet odors, and tannin bleeds are shellac-based or oil-based products. They create a penetrating seal that stops stains from bleeding through your topcoat, and you will typically need to apply 1 to 2 coats before painting.
There is probably no paint more capable than shellac to block any stain. It works just as well as oil-based undercoat. Any shellac-based primer will do a job, but the best I have used is HB42 PS1 (Primer, Sealer, Stain Block). It has better opacity than the others, seems to take less coats, and is easier to use.
It's amazing. This stuff just works! Had a bad leak in my garage, in which I'd put up plasterboard, got bad mould after it dried out and didn't want to put up new plasterboard. Used this stain block and can't believe how well it worked, only needed one coat and completely covered it up.
1. Zinsser B-I-N. Zinsser B-I-N Primer is a shellac-based primer that offers great stain blocking properties and adhesion for your chosen topcoat. This stain blocking paint is particularly suited to covering any stains on wood or MDF.
The toughest stains –– water, smoke, tannin, grease and more–– have met their match in HGTV Home by Sherwin-Williams Oil-Based Power Primer Extreme. It hides previous color while blocking the most challenging stains, going further to deliver a mold- and mildew-resistant finish.
Painting straight over stain block isn't necessarily a problem. Your issue is probably related to varying porosity/drying times. Try just giving the areas you've stain blocked a few coats (spot prime) with your grey emulsion.
Blocks stain and odour. May need 2 coats for heavy staining.
For heavy-duty, long-lasting fabric and upholstery protection, products utilizing fluorochemical polymers, ceramic coatings, or MicroSeal consistently outperform standard, consumer-grade Scotchgard aerosols. These alternatives deliver superior resistance to oils, liquids, and everyday stains while maintaining fabric breathability.
Stain-blocking primers are used to cover stains such as watermarks, nicotine (actually tar), markers, smoke, and prevent them bleeding through newly applied layers of paint. They also provide adhesion over problematic surfaces, giving better film leveling, and durability.
Yes, KILZ is primarily designed as a sealer and stain-blocking primer. It is formulated to cover tough stains—like water damage, smoke, grease, and tannin—and prevents them from bleeding through your topcoat of paint.
Yes, a mixture of Dawn dish soap and hydrogen peroxide makes an incredibly effective DIY stain remover, but because hydrogen peroxide is a mild bleaching agent, it can occasionally cause fading or discoloration on colored or dark fabrics.
Allcoat is a 4-in-1 primer sealer, stain blocker & finish for all interior surfaces and virtually odourless.
The best stain remover depends on the mess you are dealing with. For on-the-go spills, Miss Mouth's Messy Eater Spray excels on food stains and grass, while the Tide to Go Pen is essential for coffee, ink, and makeup. For tough, set-in laundry stains, OxiClean Max Force Spray or soaking in OxiClean Versatile Powder is highly effective.
Stain Blocker can be used to protect pigmented finishes from stain, dye and wood tannin bleed-through. Use over an existing finish, raw wood or MDF as a base coat for light-colored General Finishes Milk Paint and Pigmented Polys.
3M pulled the original Scotchgard formula off the market in 2000 due to environmental and health concerns surrounding PFOS (perfluorooctane sulfonate), a key ingredient used to make the spray repel stains and water.
It repels liquids, making cleanup more accessible and more effective. Fabrics treated with Scotchgard are easier to clean, allowing for more straightforward maintenance. The protective layer ensures that dirt and spills stay on the surface, simplifying the cleaning process and reducing the need for vigorous cleaning.
To prevent stains on upholstered furniture, spray a high-quality, fabric-specific protector like Scotchgard Fabric Water Shield or Guardsman Fabric Defense. These sprays create an invisible, liquid-repellent barrier so spills can be wiped away before they soak into the fibers.
The absolute best stain-blocking primers for covering stubborn water rings, smoke damage, pet odors, and tannin bleeds are shellac-based or oil-based products. They create a penetrating seal that stops stains from bleeding through your topcoat, and you will typically need to apply 1 to 2 coats before painting.
A 5-gallon pail of Ready Seal exterior wood stain and sealer covers approximately 625 to 750 square feet, depending on the porosity and texture of your wood.
You have used an oil primer as a stain blocker. You can paint water based paint over top of that. Just make sure you allow at least 12 hours of dry/ cure time!
The best stain-blocking paints are actually specialized primers. For severe stains (water, smoke, pet odors, and tannin bleed), a shellac-based primer like Zinsser B-I-N is the gold standard. For standard, everyday stains, a water-based option like Kilz 2 or Zinsser Bulls Eye 1-2-3 works perfectly.
Red is universally considered the hardest paint color to cover. Vibrant red pigments are highly transparent and inherently prone to bleeding through subsequent layers. Other notoriously difficult colors to cover include black, dark blue, dark green, and bright yellow.
Multi-applicable solvent-based stain-blocking primer and sealer. Ideal for interior / exterior use. Paintable in only 2 hours.