Oxidized Bitumen 85/30: Full Technical Specifications & Applications
Explore Oxidized Bitumen 85/30: complete Specifications, properties, and industry-grade applications for pipe coating, roofing, waterproofing, and more.
🛢️ Oxidized Bitumen 85/30: Specification, Technical Performance & Industrial Applications
Oxidized Bitumen 85/30—also known as Blown Asphalt 85/30—is a semi-hard, thermally stable bitumen product engineered for high-temperature environments and long-term waterproofing protection. With a high softening point and medium penetration value, it is ideally suited for applications such as pipe coating, industrial adhesives, waterproofing membranes, and expansion joint fillers.
This blog presents a full breakdown of Oxidized Bitumen 85/30’s specifications and practical use cases.
🔍 What is Oxidized Bitumen 85/30?
Oxidized Bitumen 85/30 is produced through a controlled air-blowing process, where hot penetration-grade bitumen is exposed to air under pressure. This modifies its molecular structure, raising the softening point and lowering the penetration. The result is a more rigid, thermally resistant material that remains stable under load, even in extreme heat.
With a softening point of ~85°C and penetration of ~30 dmm, it balances hardness with workable flexibility—perfect for use in industrial insulation, road expansion joints, and roofing sheets.
🏭 Industrial Applications of Oxidized Bitumen 85/30
🧱 1. Foundation and Basement Waterproofing
Oxidized Bitumen 85/30 is commonly used in waterproofing coatings for foundations, retaining walls, and basements. Its hardness and low flow rate ensure that it doesn’t degrade or migrate under hydrostatic pressure.
🏗️ 2. Bridge and Road Expansion Joint Sealants
Its combination of hardness and controlled penetration makes it an excellent binder for bridge joints, highway expansion joints, and crack-filling materials. It reduces:
Thermal cracking
Joint movement stress
Bitumen bleeding in hot weather
🛢️ 3. Pipe Coating and Corrosion Protection
Bitumen 85/30 provides a protective dielectric layer on buried steel pipelines and tanks. When combined with fiberglass, aluminum, or felt wraps, it forms a long-lasting anticorrosive shell.
🔥 4. Thermal Insulation Protection for HVAC & Refineries
Its thermal stability allows it to act as a protective layer over insulation panels and ducts, especially in:
Refineries
Petrochemical plants
Thermal power stations
It also prevents condensation and reduces thermal bridging.
🧪 5. Bituminous Paints, Coatings, and Mastics
Blown Asphalt 85/30 is widely used in bituminous compounds, including:
Primer paints
Solvent-based protective coatings
Adhesive mastics
Anti-rust varnishes
Its high purity and stability improve the longevity and performance of the final product.
🏠 6. Roofing Sheets and Felt Manufacturing
In the roofing industry, Blown Asphalt 85/30 is used in the production of waterproof membranes, roofing felt, and bituminous shingles. It improves:
Heat resistance
Water tightness
Dimensional stability under load
🧪 Key Performance Characteristics
✅ High Softening Point (85°C): Perfect for hot-climate construction
✅ Moderate Penetration (30 dmm): Offers flexibility without sacrificing structure
✅ High Flash Point (>250°C): Ensures thermal safety
✅ Long-Term Aging Stability: Resists hardening, oxidation, and shrinkage
✅ Low Moisture Permeability: Effective in below-grade waterproofing
✅ Excellent Adhesion: Sticks to concrete, steel, wood, and stone
❓ FAQs About Oxidized Bitumen 85/30
❓ What is Oxidized Bitumen 85/30 used for?
Blown Asphalt 85/30 used in waterproofing, road joint sealing, pipe coating, and roofing membranes due to its thermal and structural stability.
❓ What are the differences between 85/30 and 85/25?
Both are hard grades, but Oxidized Asphalt 85/30 is slightly more flexible, making it suitable for applications needing a bit more elasticity (e.g., roofing sheets and mastics), while 85/25 is best for rigid insulation and chemical tank lining.
❓ Is Bitumen 85/30 compatible with solvents?
Yes. It has over 99% solubility in trichloroethylene, making it compatible with industrial-grade solvents used in coatings and adhesives.
❓ How is 85/30 applied?
Typically applied hot using sprayers, pour-and-spread tools, or brushes, depending on the application (e.g., coating or sealing).
❓ What packaging formats are available?
Oxidized Asphalt 85/30 available in:
25 kg kraft or meltable PE bags
180 kg steel drums
Block form for bulk melting
Customized pallet packaging for export
❓ Can it be used in combination with fiberglass or other reinforcement?
Yes, it pairs well with glass fabric, aluminum sheets, and polyester mats for enhanced durability in multi-layer systems.
🔍 Conclusion
Oxidized Bitumen 85/30 is a superior semi-hard bitumen grade, engineered for industrial conditions that require both structural durability and controlled elasticity. Its high softening point makes it ideal for hot climates, while its medium penetration level ensures enough workability for roofing, joint sealing, and pipe protection applications.
From heavy-duty waterproofing systems to protective coatings in refineries and bridges, Bitumen 85/30 is a go-to choice for engineers and contractors demanding high performance, reliability, and long-term value. Its versatility across industries ensures it remains in demand for both new construction and maintenance operations.
📣 Call to PEAK UNIVERSAL BUSINESS LTD: Request Oxidized Bitumen 85/30 in Bulk
📦 Available in Kraft Bags, Drums & Blocks
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🧪 Custom Formulations Available Upon Request
📞 Get a Technical Datasheet or MSDS Today
✅ Contact our experts today to get the highest-quality Blown Asphalt 85/30—manufactured, tested, and delivered to meet your exact specifications.
✅ We in PEAK UNIVERSAL BUSINESS LTD. provide fast shipping, technical guidance, and full compliance with international standards.
📞 Request a quote now or speak with our team for more information.
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