Zinsser Cover Stain Oil-Based Adhesion Primer & Sealer is a high-performance, solvent-based primer designed to provide excellent adhesion, powerful stain blocking and reliable surface sealing for interior and exterior decorating projects.

Combining the benefits of an adhesion primer, stain blocker and sealer in one versatile formula, Zinsser Cover Stain creates a dependable foundation for both water-based and solvent-based finishing paints.

Its specialist oil-based formulation offers excellent hiding power, helping conceal troublesome stains and prevent discolouration from bleeding through the finished topcoat.

Particularly effective against water stains, smoke stains, nicotine staining and natural wood discolouration, Cover Stain is an excellent choice for renovation, property maintenance and professional decorating.

The primer provides outstanding adhesion to many suitable surfaces without sanding, reducing preparation time while creating a strong bond coat for subsequent paint finishes.

For exterior projects, Zinsser Cover Stain is especially effective on wood, timber panelling, trim, cedar and redwood, where its penetrating and flexible formulation helps provide a durable base that resists cracking and peeling.

The fast-drying formula becomes touch dry in approximately 35 minutes and can be recoated after just 2 hours, making it ideal for projects where time and efficiency matter.

With coverage of up to 9.8m² per litre on most surfaces, Zinsser Cover Stain provides an efficient solution for professional decorators, painters, builders and DIY enthusiasts.

For anyone searching for Zinsser Cover Stain, oil based primer, stain blocking primer, exterior wood primer, nicotine stain blocker, water stain primer, adhesion primer or cedar bleed primer, Cover Stain combines excellent adhesion with powerful stain-blocking performance.

Key Benefits

• Genuine Zinsser Cover Stain

• High-performance oil-based primer

• Solvent-based adhesion primer and sealer

• Suitable for interior and exterior use

• Excellent adhesion to a wide range of surfaces

• Bonds to many suitable surfaces without sanding

• Powerful stain-blocking performance

• Excellent hiding power

• Permanently seals troublesome stains

• Blocks water stains

• Blocks smoke stains

• Blocks nicotine stains

• Helps prevent cedar bleed

• Helps prevent redwood bleed

• Excellent exterior wood primer

• Penetrates and seals timber

• Suitable for exterior wood panelling

• Ideal for exterior timber trim

• Flexible formulation

• Helps resist cracking and peeling

• Excellent enamel undercoating performance

• Compatible with water-based topcoats

• Compatible with solvent-based topcoats

• Touch dry in approximately 35 minutes

• Recoatable after approximately 2 hours

• Coverage up to 9.8m² per litre

• Tintable towards pastel, mid-tone and deep-tone colours

• Ideal for professional decorating and DIY renovation

High-Performance Oil-Based Primer & Sealer

Zinsser Cover Stain features a specialist oil-based, solvent-based formulation designed for demanding decorating and maintenance applications.

Unlike basic general-purpose primers, Cover Stain combines several important functions:

• Adhesion promotion

• Surface sealing

• Stain blocking

• High hiding power

• Timber priming

• Enamel undercoating

This makes it particularly useful when preparing difficult surfaces or renovating areas affected by staining.

The primer creates a reliable base for compatible decorative finishes, helping improve the appearance and durability of the completed paint system.

Excellent Adhesion Without Sanding

One of the main advantages of Zinsser Cover Stain is its ability to provide excellent adhesion to many suitable surfaces without sanding.

This makes it particularly useful when repainting previously decorated surfaces where additional bonding performance is required.

By providing a strong adhesion-promoting coat, Cover Stain helps subsequent paint finishes bond more effectively.

Surfaces must still be clean, dry and sound. Loose coatings, contamination and existing surface defects should always be removed or treated before priming.

Powerful Stain-Blocking Primer

Zinsser Cover Stain is designed to permanently seal troublesome stains, helping prevent them from bleeding through decorative topcoats.

Some stains can migrate through ordinary emulsion or finishing paint, leaving visible discolouration even after multiple coats.

Cover Stain creates a protective barrier that helps isolate staining beneath the finished paint system.

It is particularly effective against:

• Water stains

• Smoke stains

• Nicotine stains

• Cedar bleed

• Redwood bleed

This makes it especially useful for refurbishment, renovation and property maintenance work.

Water Stain Blocking Primer

Historic water leaks can leave unsightly brown or yellow stains on walls, ceilings and other decorated surfaces.

Zinsser Cover Stain is an effective water stain blocking primer, helping prevent these marks from reappearing through the finished paintwork.

It is particularly useful for suitable:

• Water-stained ceilings

• Previously damp walls

• Repaired plaster surfaces

• Historic leak marks

• Renovation projects

Before application, the source of moisture must be repaired and the affected surface allowed to dry completely.

Nicotine Stain Blocking Primer

Nicotine contamination can leave persistent yellow or brown staining on interior surfaces.

Ordinary paint may struggle to conceal these marks, particularly where staining is severe.

Zinsser Cover Stain helps block nicotine stains, creating a more reliable foundation for subsequent decorative coatings.

This makes it particularly useful when redecorating previously smoke-exposed properties.

Smoke Stain Primer

Smoke damage can leave visible staining on walls, ceilings, doors and other surfaces.

Zinsser Cover Stain helps seal smoke-related stains, reducing the likelihood of discolouration showing through the finishing paint.

The product is suitable for stain blocking; it should not automatically be treated as a dedicated odour-sealing system where persistent smoke smells are also present.

For severe odour contamination, a specialist odour-blocking primer such as Zinsser B-I-N may be more appropriate.

Exterior Wood Primer

Zinsser Cover Stain is particularly well suited to exterior timber priming.

Its penetrating formulation helps seal suitable wood surfaces, creating a strong foundation for compatible exterior paints.

This makes it useful for:

• Exterior timber trim

• Wood panelling

• Timber cladding

• Wooden decorative features

• Cedar

• Redwood

• Suitable exterior joinery

Always ensure the timber is appropriately prepared, dry and suitable for the intended coating system.

Penetrates & Seals Wood

Timber can absorb paint unevenly, affecting coverage, adhesion and finish.

Zinsser Cover Stain is designed to penetrate and seal suitable wood surfaces, helping provide a more consistent foundation for decorative topcoats.

This is particularly beneficial when preparing exterior timber and porous wooden substrates.

Helps Resist Cracking & Peeling

Exterior wood can expand and contract as temperature and moisture conditions change.

Zinsser Cover Stain features a penetrating and flexible formulation designed to accommodate the demands of suitable exterior timber applications.

This helps the finished paint system resist cracking and peeling when the surface is correctly prepared and compatible topcoats are applied.

Ideal for Exterior Wood Panelling

Dimensionally unstable timber can be challenging to paint because movement may place stress on the coating.

Cover Stain is particularly useful on exterior wood panelling and trim, where its flexible formulation provides a dependable base for suitable finishing paints.

Blocks Cedar & Redwood Bleed

Certain woods, including cedar and redwood, contain natural extractives that can migrate through paint.

This can cause unwanted brown or yellow discolouration.

Zinsser Cover Stain is designed to block cedar and redwood bleed, making it an excellent choice for preparing these timbers before painting.

Excellent Hiding Power

Cover Stain provides excellent hiding performance, helping conceal existing surface discolouration and create a more uniform base.

This is particularly useful when covering stained or previously decorated surfaces.

A consistent primer coat can also help improve the appearance of the final paint finish.

Excellent Enamel Undercoating

For interior decorating, Zinsser Cover Stain provides excellent enamel undercoating performance.

This makes it particularly useful when preparing suitable woodwork and trim before applying compatible enamel finishing paints.

Potential applications include:

• Interior doors

• Door frames

• Skirting boards

• Architraves

• Timber trim

• New woodwork

• Suitable interior joinery

Prime, Sand & Topcoat New Wood Trim in One Day

The fast-drying performance of Zinsser Cover Stain makes it especially useful for professional decorating projects.

Under suitable conditions, new wood trim can be primed, sanded and top-coated on the same day.

This helps reduce downtime and allows work to progress efficiently.

Compatible with Water-Based & Solvent-Based Topcoats

Zinsser Cover Stain provides a versatile foundation for both water-based and solvent-based finishing paints.

This makes it useful across a broad range of decorating projects without restricting the choice to a single type of compatible topcoat.

Always check the compatibility and application instructions for the chosen finishing paint.

Interior & Exterior Applications

Cover Stain is designed for both interior and exterior use.

For interior projects, it is particularly effective for stain blocking, adhesion priming and enamel undercoating.

For exterior projects, it is especially useful for sealing and priming suitable timber, including wood panelling and trim.

This versatility makes it a valuable product for professional decorators and DIY users working across multiple types of projects.

Fast Drying – Approximately 35 Minutes

Zinsser Cover Stain becomes touch dry in approximately 35 minutes under suitable conditions.

This helps reduce delays between preparation and subsequent decorating stages.

Actual drying times can vary according to temperature, humidity, ventilation, substrate and application thickness.

Recoatable in Approximately 2 Hours

The primer can be recoated after approximately 2 hours, allowing the finishing process to continue relatively quickly.

This makes it particularly useful for decorating projects where a fast turnaround is important.

Coverage – Up to 9.8m² per Litre

Zinsser Cover Stain provides coverage of up to 9.8 square metres per litre on most surfaces.

Actual coverage depends on:

• Surface porosity

• Surface texture

• Substrate condition

• Application method

• Coating thickness

Porous or rough surfaces may require more product than smooth, previously coated substrates.

Tintable Primer

Zinsser Cover Stain can be tinted towards most pastel, mid-tone and deep-tone colours, subject to the manufacturer's tinting recommendations.

Tinting the primer towards the chosen finishing colour can help create a more suitable foundation for the topcoat.

Zinsser Cover Stain vs Zinsser B-I-N Shellac Primer

Both products provide strong adhesion and specialist stain-blocking performance, but they are designed for different priorities.

Zinsser Cover Stain is particularly useful for:

• Exterior wood priming

• Cedar and redwood bleed

• Water stains

• Smoke and nicotine stains

• Interior enamel undercoating

• Flexible exterior timber applications

• Oil-based adhesion priming

Zinsser B-I-N Shellac Primer is particularly useful for:

• Persistent stain blocking

• Timber knots and sap streaks

• Smoke and nicotine contamination

• Permanent odour sealing

• Specialist interior spot priming

• Fast-drying shellac-based applications

For exterior woodwork, Cover Stain is often a particularly suitable option, while B-I-N is useful when demanding stain and odour sealing is the main priority.

Zinsser Cover Stain vs Zinsser Bulls Eye 1-2-3

Both primers provide excellent adhesion, but their formulations and strengths differ.

Zinsser Cover Stain offers:

• Oil-based formulation

• Powerful stain blocking

• Excellent exterior wood performance

• Cedar and redwood bleed protection

• Flexible exterior timber priming

• Strong enamel undercoating performance

Zinsser Bulls Eye 1-2-3 offers:

• Water-based formulation

• Low odour

• General-purpose adhesion priming

• Suitable interior and exterior applications

• Rust-inhibitive performance on clean ferrous metals

• Fast drying and recoating

Choose according to the substrate, staining problem, environmental conditions and finishing requirements.

How to Use

1. Ensure the surface is clean, dry and sound.

2. Remove dust, dirt, grease, loose paint and flaking material.

3. Repair the cause of any water damage and allow affected surfaces to dry completely.

4. Check that the substrate is suitable for Zinsser Cover Stain.

5. Stir the primer thoroughly before application.

6. Apply an even coat using an appropriate brush, roller or approved spraying method.

7. On stained surfaces, ensure the affected areas are adequately covered.

8. On exterior timber, prepare the wood according to the manufacturer's recommendations.

9. Allow approximately 35 minutes for the primer to become touch dry.

10. Allow approximately 2 hours before recoating under suitable conditions.

11. Sand where appropriate once the primer is sufficiently dry.

12. Apply a compatible water-based or solvent-based finishing paint.

13. Follow the manufacturer's instructions for any additional coats and final drying requirements.

Important: Cover Stain is solvent-based. Provide adequate ventilation, keep away from ignition sources and use suitable protective equipment and cleaning products as specified by Zinsser.

Ideal For

• Interior decorating

• Exterior decorating

• Stain blocking

• Water stains

• Smoke stains

• Nicotine stains

• Cedar bleed

• Redwood bleed

• Exterior wood

• Exterior timber trim

• Wood panelling

• Timber cladding

• Interior doors

• Door frames

• Skirting boards

• Architraves

• New wood trim

• Enamel undercoating

• Property renovation

• Professional decorating

• Painting and maintenance

• DIY projects

Product Information

Brand: Zinsser
Product: Cover Stain Oil-Based Adhesion Primer & Sealer
Type: Adhesion primer, sealer and stain blocker
Base: Oil/solvent-based
Use: Interior and exterior
Coverage: Up to 9.8m² per litre on most surfaces
Touch Dry: Approximately 35 minutes
Recoatable: Approximately 2 hours
Adhesion: Excellent on suitable surfaces
No Sanding Required: On many appropriately prepared substrates
Stain Blocking: Yes
Water Stain Blocking: Yes
Smoke Stain Blocking: Yes
Nicotine Stain Blocking: Yes
Cedar Bleed Blocking: Yes
Redwood Bleed Blocking: Yes
Exterior Wood Priming: Yes
Penetrating Wood Formula: Yes
Flexible Exterior Performance: Yes
Cracking & Peeling Resistance: Helps resist cracking and peeling
Enamel Undercoating: Yes
Water-Based Topcoat Compatibility: Yes
Solvent-Based Topcoat Compatibility: Yes
Tintable: Yes, towards suitable pastel, mid-tone and deep-tone shades
Primary Use: Interior and exterior adhesion priming, stain blocking, surface sealing and exterior wood preparation before applying compatible finishing paints.

WEEE Recycling Producer Registration Number:12889

How do I return my old product to be recycled?

You can return your old product to MyDIY. Waste Electrical and Electronic Equipment (WEEE) is taken back free of charge on a one-for-one, like-for-like basis. Waste batteries including rechargeable batteries are taken back free of charge. You are not obliged to make any purchase when returning old batteries. Each local authority must also accept household WEEE and small batteries free of charge at its recycling facilities. All WEEE and waste batteries must be recycled and should not be placed in any of your household wheelie bins. Make sure you always recycle all your old electrical goods and batteries.

What products can I recycle for free?

You can return anything that is electricaly powered or battery powered. Even your old bicycle lamps can be recycled!.

Do you take back used batteries?

Yes we do. The batteries that we accept are AA, AAA, C or D, powertool batterys and also the flat batteries that are found in watches and toys. Unfortunately we do not accept back any Industrial or car batteries.

Do I need to have made a purchase at MyDIY.ie?

No you don't. You can recycle any of the above items at our store in Inchicore Dublin 8, even if you have not made a purchase with us.

Will you collect my old product?

Yes, but we must be notafied within 14 days of purchase date. You can still arrange to have your old appliance recycled free of charge. Simply bring it back to our Inchicore store and we will ensure that it is disposed of in an environmentally friendly manner.

How much will it cost?

There is no charge to return products to any of our warehouses.

Why should I recycle with MyDIY?

We will ensure that your old product is disposed of correctly to reduce the potentially harmful effects caused on the environment and to conserve natural resources. Further information can be found on weeeireland.ie.

EMC (Environmental Management Cost) Included in the purchase price. 

Gas discharge lamps, LFLs and CFLs €0.15

LED lamps and luminaires €0.05

Large appliances €5.00

Information

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We ship all orders via DPD, one of Ireland’s most trusted couriers. With DPD’s one-hour delivery window, you won’t have to wait around all day for your MyDIY.ie order!

Delivery Times

Each product on our website is marked with an estimated delivery time. If you order multiple items, your order will arrive based on the item with the longest delivery time. For example, if you buy two next-day items and one 3-day item, the entire order will arrive in 3 days.

While most products arrive in 1-2 days, we offer over 44,000 items, so please allow 4-5 working days for some deliveries. Need it faster? Call us at 01-446692, and we'll do our best to help.

Delivery Charges

• FREE delivery for orders over €150 within Ireland.

• Orders under €150: €8.99 delivery fee.

• International delivery: Charges based on weight—contact us for a quote.

When Will I Receive My Order?

• Most orders ship on a 24-hour courier service (2 working days).

• Larger orders may take 4-5 days, and pallet deliveries require scheduling.

• Orders placed before 2 PM usually ship within 24 hours.

• Orders after 1:30 PM Friday or on weekends ship the following week.

• Busy holiday periods may cause slight delays beyond our control.

Do I Need to Be Home for Delivery?

Yes, someone must sign for deliveries due to item value. If you're not home, DPD will leave a card with re-delivery or collection instructions. After two failed attempts, your order may be returned to us, and a re-delivery fee may apply.

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We carefully pack all orders, but if something arrives damaged or incomplete, contact us within 24 hours. Report shortages within 3 days of delivery.

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We ship to Europe and worldwide, with charges based on weight. Liquid products cannot be shipped internationally due to regulations. Contact us for a quote—we're happy to help!

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