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Duram Azcoseal is a solvent-based acrylic sealer and primer engineered for deep penetration into porous masonry, concrete, and friable substrates. Its low-viscosity formula utilizes cross-linking technology to create a molecular-level bridge, ensuring high-strength membrane adhesion on challenging surfaces like tilt-up slabs where water-based primers may fail to bond.
This versatile solution consolidates crumbly surfaces and encapsulates hazardous dust while providing a UV-resistant, weatherproof barrier against wind-driven rain and salt spray. For optimal system integrity, contractors must ensure the substrate is dry and allow for complete solvent evaporation before applying topcoats to prevent membrane bubbling.
While highly effective on absorbent materials, Duram Azcoseal is not a vapor barrier and is not suitable for non-porous surfaces such as metal, glazed tiles, or marble.
Frequently Asked Questions
Can Duram Azcoseal be used as a primer under polyurethane membranes?
Yes, Azcoseal is compatible as a primer for polyurethane membranes like Duram Multithane. Ensure full solvent flash-off before applying to prevent bubbling.
What coverage rate should I expect on porous concrete?
Expect approximately 4m² per litre per coat on standard porous concrete. Highly absorbent substrates may require additional coats for full penetration and binding.
Applications & Benefits
| Application / Use Case | Key Benefit | Primary Trades |
|---|---|---|
| Sealing Face Brick & Blockwork | Protects against water ingress, wind-driven rain, and salt spray while maintaining natural appearance. | Builders, Facade Contractors |
| Priming for Membranes & Coatings | Creates a uniform, adhesion-promoting surface that enhances waterproofing performance. | Waterproofers, Tilers |
| Encapsulating Friable Asbestos Sheeting | Binds and seals surface to reduce dusting and improve safety compliance. | Remedial Contractors, Maintenance Crews |
| Wet-Look Sealer for Pavers & Masonry | Provides a durable, clear satin finish for a decorative yet protective result. | Landscapers, Builders |
| Reactivating Existing Acrylic Coatings | Improves bond for recoating, saving time and labour on surface preparation. | Waterproofers, Painters |
| Dust Sealing Concrete Floors | Consolidates dusty substrates and prevents further breakdown. | Warehouse Builders, Flooring Contractors |
Applying Duram Azcoseal: Enhanced Protocols & Best Practices
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Surface Preparation
Ensure substrate is clean, dry, sound, and free of contaminants. Remove efflorescence, mold, and loose material using pressure washing or mechanical means.
Pro Tip: Fill cracks with Duram sealant and allow to cure before applying Azcoseal for a uniform, sealed surface. -
Application
Brush/Roller
Apply evenly at 4 m²/L per coat. Work well into substrate to ensure penetration.
Spray
Use low-pressure spray equipment for large areas. Back-roll for even film and penetration.
Timing: Touch dry in 1–2 hours, recoat within 24 hours. Full cure within 24 hours at 25 °C, 50% RH.Pro Tip: Do not apply if rain is imminent. Allow solvents to fully evaporate before overcoating with membranes or coatings to avoid bubbling. -
Cleanup
Clean tools and adjacent surfaces with Duram Solvent before product cures. Wash hands with warm soapy water and a stiff-bristle brush.
Limitations & Safety
Product Limitations
Not recommended for particle board, chipboard, glazed tiles, terrazzo, or very smooth concrete. For these substrates, use Duram Primeseal MC as a compatible primer.
Do not apply to wet, seeping, or saturated substrates. Entrapped moisture can cause whitening, blistering, or coating failure.
Product is not a vapour barrier and should only be used where risk of rising moisture is low.
Cured surface may be slippery when wet — take care in pedestrian areas.
If overcoating with membranes, ensure solvents have fully evaporated to prevent bubbling of topcoat.
Safety & Handling Requirements
Personal Protective Equipment
Wear solvent-resistant gloves, protective eyewear, and long-sleeved clothing to avoid skin and eye contact. Use an organic vapour respirator when working in poorly ventilated areas.
Ventilation Requirements
Use in well-ventilated areas only. Provide mechanical ventilation or open windows and doors to disperse vapours. Avoid enclosed spaces without airflow.
Fire & Handling Precautions
Class 3 flammable liquid. Keep away from heat, sparks, and open flames. Do not smoke during application. Store in a cool, dry place away from ignition sources.
Emergency First Aid
Eyes:
Flush immediately with plenty of clean water for at least 15 minutes. Seek medical attention.
Skin:
Remove contaminated clothing. Wash skin thoroughly with soap and water.
Inhaled:
Move to fresh air immediately. Keep at rest and seek medical attention if symptoms persist.
Swallowed:
Do NOT induce vomiting. Rinse mouth and seek urgent medical attention.
Seek medical attention immediately in all cases of serious exposure.
Duram Azcoseal Application Guide
Concrete, Brick, and Masonry
Surface Preparation
Ensure surfaces are sound, stable, clean, and completely dry. Remove dust, laitance, and efflorescence by pressure washing and allow to dry. Fill cracks and voids with suitable Duram repair mortar before priming.
Primer Requirements
Self-priming on porous concrete, brick, and blockwork
Apply Azcoseal directly in two coats at 4 m²/L per coat for best sealing performance.
Tilt-Up & Low-Porosity Concrete
Surface Preparation
Mechanically prepare smooth or dense surfaces to open the pores. Remove bond breakers or curing compounds prior to priming.
Primer Requirements
Azcoseal recommended for optimal membrane adhesion
Apply one uniform coat and allow full solvent flash-off before overcoating with membranes.
Pavers, Sandstone, and Decorative Masonry
Surface Preparation
Test a small inconspicuous area first, as solvent action may draw salts to the surface and cause discolouration. Thoroughly clean and dry before application.
Primer Requirements
No additional primer required
Apply two coats for weatherproofing or three coats for a high-build, trafficable wet-look finish.
Downloads & technical resources
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