Indigo Damp Seal Primer: The Ultimate Damp Proof & Stain Blocking Primer
Indigo Damp Seal Primer is a high-performance, solvent-based sealer primer designed for one of the toughest problems in house painting: dampness. This is the professional’s choice for a primer for damp walls. It is engineered to do two jobs perfectly: first, to create a water-resistant barrier that prevents minor dampness from blistering your topcoat, and second, to permanently block ugly stains like efflorescence (salty white powder), old water stains, and rust.
If you have a wall with interior dampness or damp patches, applying a regular water-based interior wall paint or wall putty is a waste of time. The moisture will simply push them off the wall, causing peeling and blistering. Indigo Damp Seal Primer is the essential waterproofing primer that you apply *before* putty and paint to ensure your final finish lasts.
Is This a “Damp Stop” or a “Damp Seal”? (Critical Information)
Customers often ask this, and it is the most important part of your project. Indigo Damp Seal Primer and Indigo Damp Stop 2K are two different products for two different problems:
- Use Indigo Damp Stop 2K (Heavy-Duty Treatment): Use this *first* on bare, raw plaster/concrete that has active, heavy leaks or negative side water pressure. It’s a 2-component system that creates a thick, cement-based barrier to *stop* the water.
- Use Indigo Damp Seal Primer (This Product): Use this *after* the wall is as dry as possible, OR after you have applied a treatment like Damp Stop 2K. This damp proof primer acts as the final “seal,” locking in any residual moisture, blocking stains, and getting the wall ready for wall putty and paint. It is a 1-component, easy-to-use primer.
In short: Damp Stop 2K *stops* the leak. Damp Seal Primer *seals* the wall so you can paint it.
Where to Use Indigo Damp Seal Primer (Applications)
This is a versatile damp wall treatment and stain block primer for many surfaces:
- Interior Damp Wall Treatment: Perfect for interior walls that show damp patches or feel slightly damp, especially on the ground floor.
- Efflorescence & Salt Blocker: The ideal primer for efflorescence. After scraping off the white powder, this primer seals the surface and prevents the salts from coming back through.
- Stain Block Primer: Permanently covers and blocks tough stains. Use it to cover old water stains on a ceiling, rust stains, or even soot and grease stains.
- Primer for POP/Gypsum: Provides a strong, moisture-resistant base for painting over POP or gypsum boards.
- Exterior Primer: Can be used on exterior walls as a sealer primer in small, problematic areas before applying weatherproof exterior paint.
Key Features & Benefits
- Superior Stain Blocking: Permanently seals in the toughest stains, including water, salts (efflorescence), and rust.
- Excellent Adhesion: The solvent-based formula cuts through and grips chalky, dusty, and slightly damp surfaces, providing a powerful bond for topcoats.
- Water Resistant: Creates a moisture-existent barrier that protects the final home paint colour from blistering and peeling.
- Easy to Use (1K System): A single-pack, ready-to-use primer. No complex mixing, unlike 2K systems.
- Quick Drying: Dries quickly, allowing you to proceed with wall putty and painting on the same day.
- Alkali Resistant: Fights the alkali in fresh plaster that can damage paint.
Technical Specifications
- Brand: Indigo Paints
- Product: Indigo Damp Seal Primer
- Colour: White
- Finish: Matt
- Base: Solvent-Based
- Form: Ready-to-use Liquid
- Thinning: Can be thinned with up to 10-15% Indigo White Spirit / MTO.
- Application: Brush or Roller
- Drying Time:
- Touch Dry: 30-45 minutes
- Recoat Time: 4-6 Hours (before applying putty or topcoat)
- Coverage: Approx. 10-12 sq. meters (110-130 sq. ft.) per litre per coat. *Coverage depends on surface porosity.*
- Available Sizes: 500ml, 1L, 4L, 10L, 20L (We are your source for the primer paint price 20 liter).
How to Apply Indigo Damp Seal Primer (Application Guide)
Follow these steps for a professional damp wall treatment.
- Surface Preparation (CRITICAL): This is the most important step. Scrape off all old, loose, and peeling paint. Remove all existing wall putty. If you see white, fluffy efflorescence, you must remove it by scraping and then wiping with a mild acid (like vinegar) and then with clean water.
- Ensure Dryness: The wall must be as dry as possible. Do not apply this to a soaking wet, actively leaking wall (use Indigo Damp Stop 2Kfor that first).
- Application: Apply one liberal coat of Indigo Damp Seal Primer using a brush or roller. Ensure you work it into the surface.
- Drying: Allow the primer to dry for at least 4-6 hours. It will have a strong solvent smell, so ensure the room is well-ventilated.
- Painting: The surface is now sealed and ready. You can now proceed with your standard painting steps:
- Apply your wall putty (like Indigo Poly Repair) to smooth the surface.
- Apply your interior wall paint (like Asian Paints Royale or Indigo’s emulsions).






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