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Bitumen Primer
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Bitumen Primer is a low-viscosity solution of bitumen in organic solvents (e.g., mineral spirits or aromatic hydrocarbons). It is formulated to penetrate porous substrates and enhance adhesion before applying bituminous membranes or coatings. The primer quickly evaporates to leave a tacky, bitumen-rich film that promotes strong bonding. Commonly used in construction, waterproofing, and roofing, bitumen primer improves coating durability, water resistance, and substrate compatibility.
Description
Primary Uses
- Waterproofing & Roofing
- Primer for bituminous membranes, sheets, coatings, and sealants to improve adhesion on concrete, metal, wood, and masonry.
- Prepares surfaces for asphalt-based waterproofing systems in roofs, foundations, and retaining walls.
- Promotes seamless integration of ancillary products such as flashing, edging, and pipe joints.
- Roadworks & Infrastructure Repair
- Enhances bonding of asphalt patches or overlays on existing pavements.
- Acts as a tack coat between pavement layers in maintenance work to prevent slippage or separation.
- Used as a dust suppressant and binder on gravel roads or surfaces.
- Surface Preparation
- Prepares porous surfaces for bituminous coatings to ensure uniform coverage and performance.
- Improves waterproofing systems’ efficiency by sealing hairline cracks and voids before topcoat.
Secondary Uses
- Corrosion Protection
- Serves as a rust-inhibiting primer for steel structures, pipelines, and underground tanks prior to bituminous or epoxy coating.
- Protective Coatings
- Applied on embedded metal flashings, exposed rebar, or iron structures in construction to aid subsequent polymeric or elastomeric coatings.
- Sound & Vibration Damping
- Occasionally used in tunnels or noise-barrier assemblies to seal surfaces and dampen vibration before installing dampening mats or panels.
- Temporary Surface Treatments
- Employed as a tacky surface coating for construction traffic control areas or temporary waterproofing during phased work.
PRODUCT KEY FEATURES
Basic Identification Attributes
- Chemical Name (IUPAC): Bitumen in organic solvent
- Common/Trade Name: Bitumen Primer, Asphalt Primer, Primer-Sealer
- CAS Number: 8052‑42‑4 (bitumen) plus solvent CAS
- HS Code: 2715.19.10
- Molecular Formula: Complex hydrocarbon mixture
- Synonyms: Asphalt primer, sealant primer
2. Physical & Chemical Properties
- Physical State: Liquid
- Color & Odor: Dark brown/black; strong solvent odor
- Viscosity: Low, to promote substrate penetration
- Density: ~0.9–1.1 g/cm³ (varies with solvent ratio)
- Flash Point: Typically 25°C to 40°C (solvent-dependent)
- Solubility: Insoluble in water; soluble in solvents like mineral spirits
- pH: Not applicable (non-aqueous)
- Drying Time: Usually 15–60 minutes (temperature, ventilation dependent)
3. Safety & Hazard Attributes
- Hazard Class (GHS):
- Flammable liquid (Category 3–4 depending on solvent)
- Skin irritation (Category 2)
- Aspiration hazard (Category 1)
- NFPA Ratings: Health 2, Flammability 3, Reactivity 0
- Exposure Limits: Solvent content varies; typically < 100 ppm TWA (check Safety Data Sheet)
- Reactivity: Generally stable; avoid heat, sparks, oxidizers
4. Storage & Handling Attributes
- Storage Conditions: Cool (< 25 °C), well-ventilated, away from ignition sources
- Container Type: Metal or HDPE sealed drums/cans
- Shelf Life: Typically 1–2 years if stored properly
- Special Handling: Use bonding to prevent static buildup, restrict open flame, and ensure constitutent-safe equipment
5. Regulatory & Compliance Attributes
- Regulatory Status: Regulated for VOC content; adheres to local air quality standards
- Transportation: Classified as flammable liquid (DOT Class 3), depending on solvent
- Hazard Communication: Requires GHS labeling and safety data sheet
- Waste Disposal: Dispose as hazardous waste per local regulations; avoid environmental release
6. Environmental & Health Impact
- Ecotoxicity: Harmful to aquatic life; solvents and bitumen can impact water bodies
- Persistence: Bitumen is persistent; may contribute to soil and water contamination
- Bioaccumulation: Not expected to bioaccumulate significantly
- Carcinogenicity / Mutagenicity: Bitumen exposure linked to potential carcinogenic effects in occupational settings (IARC Group 2B for fumes)
- Biodegradability: Bitumen is non-biodegradable; solvents are volatile and may degrade in the atmosphere
SAFETY HANDLING PRECAUTIONS
-
Safety Handling Precautions
- PPE: Flame-resistant lab coat, nitrile or chemical-resistant gloves, goggles or face shield, respirator as needed for solvent vapors
- Ventilation: Use in well-ventilated areas or under local exhaust
- Fire Prevention: Ground containers, avoid spark/ignition, and keep fire extinguishers (Class B foam or dry chemical) accessible
- Spill Management: Contain spills with inert absorbents; ventilate area fully
- Hygiene: Wash hands and exposed skin after use; avoid smoking, eating, or drinking during handling
First Aid Measures
- Inhalation: Move to fresh air; if breathing is impaired or dizziness occurs, seek medical attention
- Skin Contact: Wash with soap and water. Remove contaminated clothing; seek medical help for persistent redness
- Eye Contact: Flush immediately with water for at least 15 minutes; seek prompt medical attention
- Ingestion: Do not induce vomiting. If vomiting occurs, keep head low to prevent aspiration. Seek medical attention immediately
Firefighting Measures
- Fire Hazards: Highly flammable vapors; possible flash fire
- Extinguishing Media: Foam, dry chemical, or CO₂ recommended. Do not use water jets—may spread fire
- Special Precautions: Use SCBA and protective clothing. Cool adjacent containers with water to prevent pressure build-up
- Decomposition Products: Can release carbon monoxide, carbon dioxide, sulfur oxides, and black smoke
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