SPO Shellac Stain & Odour Blocker - Heavy-Duty Shellac Primer for Smoke, Tar, Creosote & Odours

• Block extreme stains and odours on walls, ceilings, wood, plaster, masonry, and previously painted surfaces

• Seal in nicotine, smoke, fire damage, water stains, oil, pen marks, tar, bitumen, creosote, and tannin bleed

• Deal with severe or recurring stains that standard primers and paints cannot stop (shellac-based formula for extreme stains)

• Use a heavy-duty shellac-based primer designed specifically for problem surfaces and extreme stain blocking

• Prevent bleed-through before applying your final decorative topcoat (permanent sealing)

• Complete redecoration faster using a rapid-drying stain and odour blocker (touch dry in 15 minutes, recoat in 45 minutes)

• Block persistent odours from smoke, pets, damp, or fire damage permanently

• Use a low-VOC or water-based product (this is shellac-based/alcohol-based with ≤340 g/L VOC—requires adequate ventilation)

• Use on surfaces that are wet, contaminated, or poorly prepared (proper surface preparation required)

• Apply in temperatures below 5°C (minimum application temperature required)

• Block general stains (use SPO General Purpose Stain Block Primer for cost-effective general stain blocking—this is for extreme stains only)

SPO Shellac Stain & Odour Blocker banishes stubborn watermarks, smoke damage, tar, creosote, and lingering odours so your topcoat looks perfect first time and stays that way. This shellac-based primer delivers professional-grade adhesion and sealing power for extreme stains that standard primers cannot handle.

Formulated by Specialist Paints Online's chemists for pro-grade adhesion, this heavy-duty primer seals stains, locks in odours, and lets you finish tough jobs in a single day. The rock-hard shellac film grips any paint and resists future staining, whilst the rapid-drying formula (touch dry in 15 minutes, recoat in 45 minutes) allows same-day completion.

Saving time, labour, and money, it's the go-to shellac primer decorators trust when nothing else works. Manufactured in the UK to exacting standards, it's the ultimate solution for fire damage, tar, creosote, nicotine, and severe odour problems.

Key Benefits

• Stain-Free Finish Fast – Stops even severe watermarks, smoke damage, tar, creosote, and tannin bleed re-appearing, guaranteeing a pristine topcoat. Shellac-based formula seals permanently.

• Lasting Results – Rock-hard shellac film grips any paint and resists future staining, so customers stay happy for years. Superior adhesion to glossy surfaces, plastics, and problem substrates.

• Cost-Effective Solution – One primer, one coat beats costly renovations and multiple coats of finish paint, cutting labour and material spend. Handles extreme stains standard primers cannot.

• Fresh-Smelling Rooms – Powerful odour blocker traps smoke, pet, and damp smells, leaving spaces ready to enjoy. Seals odours permanently, unlike water-based primers.

• Same-Day Completion – Touch dry in 15 minutes and recoatable in 45 minutes. Prime and paint before lunch. Fastest-drying stain blocker available.

• Extreme Stain Capability – Blocks fire damage, tar, bitumen, creosote, nicotine, water damage, pen marks, and tannin bleed. When standard primers fail, shellac succeeds.

• Interior & Exterior Use – Suitable for both indoor and outdoor applications. Provides durable barrier against extreme stain bleed-through on walls, ceilings, and woodwork.

Prime, paint, and finish faster. Just brush it on, wait under an hour, then apply your favourite topcoat for a showroom-ready result. With next-day UK delivery, you can order today, paint tomorrow, and create perfect walls in record time.

SPO Shellac Stain & Odour Blocker | Heavy-Duty Primer & Odour Sealer is the go-to solution for ensuring a clean, fresh finish in a variety of tough scenarios:

• Property Maintenance – Perfect for landlords, facility managers, and maintenance contractors restoring walls or ceilings with nicotine stains, smoke damage, fire damage, water damage, or lingering odours in communal or commercial spaces. Handles extreme stains standard primers cannot.

• Hospitality & Retail – Great for tackling smoke or cooking-related odours, nicotine stains, or water damage in bars, restaurants, hotels, and shops. Ensures surfaces stay pristine for guests and customers. Fast-drying formula (touch dry in 15 minutes) minimises disruption.

• Leisure & Tourism – Ideal for hotels, holiday parks, caravan parks, or attractions looking to quickly seal off stubborn stains, smoke damage, or musty smells in high-turnover environments. Same-day completion possible.

• DIY & Home Improvement – A must-have for homeowners dealing with smoke damage, fire damage, pet odours, water stains, or tar/creosote bleed. Achieve a professional-level finish without persistent bleed-through. Handles extreme stains DIY-friendly.

• Public Sector & Community Buildings – Useful for schools, community centres, libraries, or council buildings where rapid drying (recoat in 45 minutes) and reliable extreme stain sealing keep downtime to a minimum and appearance top-notch.

• Fire & Smoke Damage Restoration – Essential for fire damage restoration, smoke damage repair, and post-fire redecoration. Seals smoke stains and odours permanently, allowing quick return to use.

If you need personalised advice on treating specific extreme stains, odour problems, or selecting the right topcoat, contact our experts now via the live chat for tailored guidance!

Coverage: Approximately 10 m² per litre per coat (at recommended 40 µm dry film thickness)

Coverage per size

• 500ml: Covers approx. 5 m² per coat
• 1 litre: Covers approx. 10 m² per coat
• 2.5 litres: Covers approx. 25 m² per coat
• 5 litres: Covers approx. 50 m² per coat

Recommended coats

• 1 coat (for general extreme stain blocking)
• 2 coats (for severe stains/odours—apply second coat after approximately 30-45 minutes)

Example calculations

• For a 10 m² wall with smoke damage, you will need approximately 1 litre per coat
• For 1 coat, one 1L tin covers this area

• For a 25 m² ceiling with nicotine stains, you will need approximately 2.5 litres per coat
• For 1 coat, one 2.5L tin covers this area

• For a 5 m² section with tar/creosote bleed, you will need approximately 500ml per coat
• For 1 coat, one 500ml tin covers this area

Practical coverage may be lower depending on surface porosity, texture, and stain severity. Porous plaster or severe stains may require more primer. For accurate project planning, we recommend ordering 10-15% extra to account for surface variation.

Surface Preparation

• Ensure all surfaces are clean, dry, and free from oil, grease, dust, and loose or flaking material
• Use Fluxaf Power Clean or Fluxaf Mould and Mildew Remover to clean surfaces
• Remove surface contaminants such as nicotine residue, water staining, oils, or marker ink where possible by washing or scrubbing
• Lightly abrade glossy surfaces with fine-grit sandpaper (180-240 grit) if required to aid adhesion
• Ensure surface and air temperature is above 5°C (minimum application temperature)
• Ensure good ventilation during application and drying (shellac-based)

Application

• Stir paint thoroughly before use
• Apply using a good-quality brush or short-pile roller
• Apply a full, even coat using the minimum of brushwork
• Avoid over-brushing, as shellac dries very quickly (touch dry in 15 minutes)
• If required, apply a second coat after approximately 30-45 minutes
• Thin only if necessary with methylated spirits (maximum 5%)
• Avoid application in damp, humid, or freezing conditions

Drying & Curing Times (at 20°C)

• Touch dry: 15 minutes
• Hard dry: 30 minutes
• Recoat/overcoat time: 45 minutes (minimum 30 minutes)
• Full cure: 24 hours (3 days for maximum hardness)

Drying times may be extended in cooler temperatures or high humidity. Ensure adequate ventilation during application and drying.

Tool Cleaning

• Clean tools with methylated spirits immediately after use
• Do not clean with water (shellac-based)

Pro Tip – Heavy Stains & Fast Drying

• For severe stains or odours (e.g., nicotine, tar, fire damage, water damage), apply an initial sealing coat, allow to dry (30-45 minutes), then apply a second coat to ensure complete blockage
• This product is rapid-drying—keep the lid on the tin between applications to prevent the paint thickening or skinning during use
• Work in small sections to avoid lap marks due to fast drying

Important Notes

• Shellac-based primer—requires adequate ventilation during application and drying
• Suitable for interior and exterior use
• Blocks extreme stains: smoke, fire damage, tar, creosote, nicotine, water damage, tannin bleed
• For general stains, use SPO General Purpose Stain Block Primer (more cost-effective)
• Flash point: 24°C—keep away from heat sources and naked flames
• Highly flammable—store safely

1. What is SPO Shellac Stain & Odour Blocker used for?

SPO Shellac Stain & Odour Blocker is a powerful, shellac-based (alcohol-based) primer designed to lock in extreme stains—such as smoke damage, fire damage, nicotine, tar, creosote, and water damage—and seal away persistent odours, all whilst allowing for ultra-fast drying (touch dry in 15 minutes) and immediate overcoating (45 minutes).

2. What makes shellac-based primers better for extreme stains?

Shellac-based primers create an impermeable barrier that seals stains permanently without reactivating them. Water-based and solvent-based primers can struggle with extreme stains like tar, creosote, fire damage, and heavy nicotine. Shellac is the gold standard for extreme stain blocking and odour sealing.

3. Can I use this primer on multiple surfaces?

Yes. It's suitable for a variety of substrates, including timber, wood composites, plaster, cement, brickwork, metal, ceramic tile, glossy plastics, and previously painted surfaces. Always ensure the surface is clean, dry, and free of loose material before application.

4. How long does it take to dry?

The shellac-based formula is ultra-fast drying: touch dry in 15 minutes, hard dry in 30 minutes. You can apply a second coat or your chosen topcoat after 45 minutes, speeding up project timelines dramatically. Same-day completion is possible.

5. Does it really block odours and extreme stains?

Absolutely. Shellac is renowned for its excellent sealing properties. It prevents bleed-through of watermarks, pen oils, nicotine, tar, creosote, fire damage, and other stubborn stains, whilst also locking in odours like smoke, pets, or mustiness permanently.

6. Can I use this product outdoors?

Yes. SPO Shellac Stain & Odour Blocker can be used on both interior and exterior surfaces. For outdoor projects, ensure you follow up with a suitable exterior paint or protective coating for weather protection.

7. How do I apply it?

Apply using a good-quality brush or short-pile roller. Apply a thin, even layer for the best adhesion. Avoid over-brushing, as shellac dries very quickly. If needed, lightly sand between coats to maintain a smooth finish before applying the topcoat.

8. What coverage can I expect?

Coverage is approximately 10 m² per litre per coat, though this may vary depending on the surface's condition and porosity. Prepping surfaces thoroughly helps optimise coverage and sealing performance.

9. What's the difference between this and SPO General Purpose Stain Block Primer?

SPO Shellac Stain & Odour Blocker is for extreme stains (fire damage, tar, creosote, heavy nicotine, severe odours) and dries ultra-fast (15 minutes touch dry). SPO General Purpose Stain Block Primer is for general stains (watermarks, light nicotine, graffiti) and is more cost-effective for large areas. Use shellac for extreme problems, general purpose for everyday stains.

10. What stains can this primer block?

This primer blocks extreme stains including: smoke damage, fire damage, nicotine, tar, bitumen, creosote, water damage, damp marks, tannin bleed, pen marks, oil stains, and general discolouration. It also seals persistent odours from smoke, pets, damp, and fire damage.

For personalised recommendations, extreme stain advice, or odour-blocking guidance, contact our experts now via live chat—we're here to help you achieve a fresh, blemish-free finish!

Technical Data Sheet

Safety Data Sheet

Free Delivery on Orders Over £75: Stock up on everything you need in one go and complete the job properly

• Fluxaf Power Clean: Clean the surface and strip away grease, glue and grime ready for painting
• Fluxaf Mould & Mildew Stain Remover: treat mould, mildew and their stains prior to painting
• Application Tools: High-quality brushes, rollers, trays for smooth coverage

These products are commonly combined for best long-term results.

Fast, Reliable & Fully Tracked UK Delivery

Every order is dispatched from our warehouse using a fully tracked DX or FedEx service, so you always know when your paint will arrive.

Delivery Options

• FREE Standard Delivery (orders over £75) Arrives in 2–3 working days
• Standard Delivery – £7.95 Arrives in 2–3 working days
• Express Delivery – £13.95 Next working day delivery when you order before 12:00 noon (Mon–Thu)
• Spending £75+? Select Express Upgrade at checkout and only pay the difference

Dispatch & Delivery Times (What Happens After You Order)

• Express delivery (order before 12:00 Mon–Thu) Dispatched same day, delivered next working day
• Standard delivery (Mon–Wed orders) Dispatched next working day, delivered 2–3 working days later
• Orders placed Thursday (standard delivery) Dispatched Friday for Monday delivery
• We do not dispatch or deliver on weekends or UK bank holidays

What to Expect on Delivery

Please provide a contact telephone number at checkout. This allows the courier to share tracking updates or contact you if there are any delivery issues.

Most orders require a signature on delivery. If you may not be available during the day, we recommend delivery to a workplace, business address, or another location where someone can sign.

Outside the UK Mainland?

Delivery prices shown apply to UK Mainland only.

For the Highlands, Islands, Northern Ireland, or non-mainland addresses, please contact us for a quick personalised quote via live chat, by calling 01482 222 421, or emailing info@specialistpaintsonline.co.uk.

Bottom Line

Order today, get fast and reliable delivery, track every step, and get painting without delays.