Bitumen 85/35 — Durable Air-Blown Oxidized Bitumen Supplier

Bitumen 85/35 is a durable, air-blown oxidized bitumen grade engineered with a higher softening point and controlled penetration for superior thermal stability and hardness. This makes Bitumen 85/35 ideal for long-lasting performance in roofing, waterproofing, and industrial protection applications where consistent durability matters most. As a trusted Bitumen 85/35 manufacturer and exporter, we deliver reliable global supply, consistent product quality, and complete technical documentation with every order.

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What is Bitumen 85/35?

Oxidized Bitumen 85/35 is an air-blown bitumen grade with a softening point near 85°C and a penetration value around 35 (0.1mm). It combines high thermal stability with controlled flexibility, consistently offering better heat resistance than standard grades while remaining more pliable than harder 85/25-grade petroleum bitumen.

Oxidized Bitumen 85/35 is widely used in roofing felts, waterproofing membranes, expansion joint fillers, pipe coatings, and industrial sealing applications. Its resistance to flow and deformation makes it well suited for hot climates and exposed surfaces, delivering long-lasting protection across roofing, waterproofing, and infrastructure projects worldwide.

Black Rock Bitumen supplies Oxidized Bitumen 85/35 produced through controlled air-blowing for consistent softening point and penetration in every batch. Sourced from certified refineries and shipped through our Dubai logistics hub, our Oxidized Bitumen 85/35 meets ASTM and international standards for reliable, high-quality export-grade performance worldwide.

Applications of Bitumen 85/35

Torch-on APP bituminous roofing membranes (cap sheets and underlay)
Bridge deck waterproofing and wearing course bonding layers
Multi-layer hot-applied waterproofing for underground car parks and podium decks
Industrial floor and workshop slab waterproofing membrane

Advantages of Bitumen 85/35

EN 12591 (European Standard) classifies penetration grade bitumen by its penetration value and softening point range. Black Rock Bitumen supplies all major EN grades, tested and certified for export from our Dubai logistics hub.

Softening point of 85–95°C provides excellent heat stability on flat and low-pitch roofs in tropical and arid climates
Penetration of 30–40 dmm delivers balanced flexibility — resists cold cracking without compromising heat resistance
Excellent compatibility with APP (atactic polypropylene) modifiers for polymer-modified membrane production
Strong self-adhesion and bonding to concrete, steel, and mineral substrates when torch-applied at correct temperature
Outstanding waterproofing performance across the full membrane life cycle
Good UV and ozone resistance compared to softer bitumen grades

Black Rock Bitumen 85/35

Essential Details

Description

  • Type
  • Penetration Grade Bitumen
  • Feed Stock
  • Crude Oil
  • HS Code
  • 27132000
  • Spot Test
  • Negative
  • Inspection
  • Included
  • Delivery Term
  • FOB-CFR-CIF
  • Production and Loading Period
  • FOB-CFR-CIF
  • Payment Term
  • TT Method FOB Delivery: 30% advance and balance against customs documents CFR/CIF Delivery: 30% advance and balance against B/L daft
  • Marking
  • Marking can be customized based on customer request
  • Supply Capacity
  • 50,000 MT/Month
  • Packing
  • -New Steel Drum -Jumbo Bag

Bitumen 85/35 Specification

Oxidized Bitumen 85/35 Specifications

Essential Details

Test Method

Unit

Min.

Max.

  • Specific Gravity at 25 °C
  • ASTM D70 / EN 15326
  • Kg/Cm³
  • 1.05 approx
  • 1.06
  • Penetration at 25 °C, 100g, 5s
  • ASTM D5
  • 0.1mm
  • 35
  • 45
  • Softening Point
  • ASTM D36 / EN 1427
  • °C
  • 52
  • 60
  • Ductility at 25 °C
  • ASTM D113
  • cm
  • 85
  • 95
  • Loss on Heating
  • ASTM D6 / EN 13303
  • wt.%
  • –
  • 0.2
  • Drop in Penetration after Heating
  • ASTM D5
  • %
  • –
  • 20
  • Flash Point
  • ASTM D92 / EN ISO 2592
  • °C
  • 250
  • –
  • Solubility in Trichloroethylene
  • ASTM D4 / EN 12592
  • wt.%
  • 99
  • –
  • Spot Test
  • ASHTO T102
  • Negative

Bitumen 85/35 MSDS

pdf

Bitumen 85/35 Safety Data Sheet

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Our Packaging

We deliver bitumen in versatile, secure options: economical Jumbo Bags, robust steel Drums, or high-volume Bulk Containers (Bitutainers/Bituboxes).

Terms of Payment

Payment Terms for Smooth Transactions

TT Method

The buyer pays 30% advance, with the balance against B/L draft (CFR) or customs docs (FOB).

LC at Sight

100% irrevocable, non-transferable, confirmed LC at sight, subject to bank approval by Black Rock Bitumen.

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    Our faqs

    Frequently Asked Questions.

    Oxidized Bitumen Grade 85/35 offers high softening point, durability, and thermal stability for roofing and waterproofing applications.

    Bitumen 85/35 is an air-blown bitumen with a softening point of 85°C and penetration of 35 dmm, offering higher flexibility than 85/25 while maintaining strong heat resistance.

    It is used in roofing membranes, waterproofing systems, and industrial coatings where greater flexibility is required alongside heat resistance.

    85/35 has a higher penetration than 85/25, making it softer and more flexible — better suited to roofing membrane applications, while 85/25 suits harder, high-temperature pipeline coating.

    Yes, its balance of softening point and flexibility makes it well suited for waterproofing membrane manufacturing and roofing felt production.

    Bitumen 85/35 is typically tested per ASTM D312 for softening point, penetration, and other industrial-grade specifications.

    Application temperatures typically range from 190–220°C depending on the specific hot-applied process.

    Store in a cool, dry, covered area away from heat sources, in sealed drums or blocks to prevent contamination.

    Black Rock Bitumen supplies Bitumen 85/35 in steel drums, jumbo bags, or bulk, with FOB, CFR, or CIF delivery terms. BITUMEN 85/40 H1: Bitumen 85/40 — Hard & Durable Air-Blown Oxidized Bitumen Supplier Description: Bitumen 85/40 is a hard, durable oxidized bitumen produced through controlled air blowing, offering excellent heat resistance, thermal stability, and waterproofing performance. This grade is widely used in roofing, industrial coatings, insulation, and membrane applications where long-term durability under heat stress is essential. As a trusted Bitumen 85/40 manufacturer and exporter, we deliver consistent product quality, reliable global supply, and complete technical documentation with every shipment. CTA: Get a Bitumen 85/40 Quote → ________________ Paragraph 1 – What it is (definition): Oxidized Bitumen 85/40 is an air-blown bitumen grade with a softening point near 85°C and a penetration value around 40 (0.1mm). As the most flexible grade in the 85-series, it combines high thermal stability with improved elasticity, resisting cracking under load, temperature swings, and weather conditions. (46 words) Paragraph 2 – Where it's used (applications): Oxidized Bitumen 85/40 is commonly used in roofing membranes, waterproofing systems, road pavement additives, and industrial mastics. Its balanced hardness and flexibility make it well suited for foundations, damp-proofing, sealants, and adhesive applications requiring reliable performance across varying temperatures in demanding construction and infrastructure projects worldwide. (46 words) Paragraph 3 – Why buy from Black Rock Bitumen (trust/quality): Black Rock Bitumen supplies Oxidized Bitumen 85/40 tested to ASTM standards, ensuring consistent softening point, penetration, and quality across every shipment. Sourced from certified refineries and shipped through our Dubai logistics hub, our Oxidized Bitumen 85/40 delivers dependable, export-grade performance for construction and industrial projects worldwide. (46 words) ________________ Bitumen 85/40