Slow-Setting Asphalt Emulsifier

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Slow-setting asphalt emulsifier is a cationic slow-breaking quick-setting surfactant manufactured by advanced synthesis process. It is free from restricted substances such as nonylphenol and environmentally friendly. No acid adjustment is needed when producing emulsified asphalt, and it emulsifies various road asphalts. Especially suitable for slurry seal and micro-surfacing applications.

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Product Overview

A slurry seal is a cold-applied pavement preservation treatment made from asphalt emulsion, fine aggregate, mineral filler, water and selected additives. The asphalt emulsifier plays an important role in controlling emulsion stability, aggregate compatibility and the working time of the slurry mixture.

This cationic slow-setting asphalt emulsifier is developed for asphalt emulsion plants, road maintenance contractors and pavement preservation material suppliers producing conventional slurry seal emulsions.

Depending on the local specification and mix design, the resulting emulsion may be formulated toward CSS-1, CSS-1h or other project-specific slow-setting grades.

Product Model, Packaging and Storage

Model	Packaging	Storage	Note
HDC-MC	250 kg/barrel (plastic barrel); custom packaging available upon request.	5-35℃ in cool dry place; shelf life 12 months	May become turbid or stratified in cold weather; restore by gentle heating, no impact on performance

Technical Specifications

Parameter	Specification	Test Method
Appearance	Light yellow to brown clear liquid	Visual
Active Content	≥50%	GB/T 5174
pH value (1% aqueous solution, 25 ℃)	1.5 – 3.5	GB/T 6368
Density（25℃）	0.95 – 1.05 g/cm³	GB/T 4472
Solubility	Dispersible in cold water, fully soluble in hot water	Visual
Recommended Dosage	1.8% – 2.5% (by emulsified asphalt weight)	—

Technical Specifications

For international buyers, the product data sheet should clearly state:

Product appearance
Active content
pH value
Density
Water solubility
Recommended dosage range
Packaging options
Storage conditions and shelf life
Applicable test methods

Please retain the verified values from the existing technical data sheet and ensure that all export documents use consistent units and terminology.

Product Features

• Slow-breaking quick-setting — sufficient mixing/paving time with rapid traffic opening
• No acid adjustment, easy and safe operation
• Wide compatibility with various asphalt grades
• Produced emulsion has good storage stability

Application Scenarios

Conventional Slurry Seal

Designed for slurry seal mixtures containing well-graded fine aggregate and mineral filler. The controlled setting profile allows sufficient time for mixing, pumping and spreading before the emulsion breaks.

Highway Pavement Preservation

Suitable for preventive maintenance programs on highways, urban roads, secondary roads, airport pavements and other asphalt surfaces requiring sealing and surface renewal.

CSS Asphalt Emulsion Production

Used by asphalt emulsion manufacturers to formulate cationic slow-setting emulsions for slurry seal, fog seal, tack coat or other approved applications after laboratory validation.

Project-Specific Asphalt Emulsion Formulations

The final performance depends on asphalt grade, aggregate mineralogy, water quality, climate and construction equipment. HDC can support product selection for different regional specifications and project conditions.

For polymer-modified micro-surfacing and quick-setting requirements, see our Micro-Surfacing Asphalt Emulsifier.

Key Benefits

Cationic chemistry for strong affinity with many mineral aggregates
Controlled slow-setting behavior for longer slurry mixing and placement time
Good coating performance with fine and dense-graded aggregates
Supports stable slurry seal emulsion formulation when used with a suitable asphalt and water system
Suitable for highway and urban pavement preventive maintenance
Compatible with project-specific CSS emulsion design and laboratory mix testing
Consistent quality for asphalt emulsion plants and repeat bulk orders
Technical documentation available for international procurement and project approval

Why Choose HDC Slurry Seal Emulsifier?

HDC Materials is an infrastructure construction chemicals manufacturer serving overseas road construction and pavement maintenance projects.

Our road construction chemical portfolio includes Medium-Setting Asphalt Emulsifier, slurry seal emulsifier, Micro-Surfacing Asphalt Emulsifier, Cold Recycling Asphalt Emulsifier, SBR latex and other asphalt additives.

For bulk buyers, our supply support can include:

Product selection according to aggregate and asphalt conditions
TDS, SDS and batch quality documentation
Sample evaluation before project-scale purchasing
Export packaging and shipment coordination
Repeat-order supply for asphalt emulsion production
Technical communication with contractors, distributors and project procurement teams

Recommended Technical Evaluation

Before placing a bulk order, buyers should confirm:

Target finished emulsion grade, such as CSS-1 or CSS-1h
Base asphalt penetration and compatibility
Aggregate type, gradation and mineral surface characteristics
Water quality, pH and ionic conditions
Required mixing time and setting behavior
Local road authority or project specification
Packaging, annual demand and delivery schedule

Laboratory mix design should be completed before final production approval. The correct dosage and processing conditions depend on the complete asphalt emulsion system and should be confirmed through testing.

Frequently Asked Questions

Is this a finished slurry seal asphalt emulsion?

No. This product is an emulsifier concentrate used by asphalt emulsion producers to manufacture slurry seal asphalt emulsions.

What does CSS mean?

CSS means Cationic Slow-Setting. CSS-1 and CSS-1h normally refer to finished cationic slow-setting asphalt emulsion grades.

Is this product suitable for micro-surfacing?

This page is focused on conventional slurry seal and slow-setting emulsion systems. Polymer-modified micro-surfacing normally requires a different quick-setting emulsifier and mix design. See our Micro-Surfacing Asphalt Emulsifier page for that application.

Can it be used with every aggregate?

Not automatically. Aggregate mineralogy, fines content, moisture and surface charge affect emulsion performance. A laboratory mix design is recommended before project approval.

Who typically buys this product?

Typical buyers include asphalt emulsion plants, pavement maintenance contractors, highway construction companies, road material distributors and infrastructure project procurement teams.

What information is needed for a bulk quotation?

Please provide the target emulsion grade, base asphalt information, aggregate type, expected order volume, packaging preference, destination country and required delivery schedule.

Request a Bulk Quotation

Looking for a reliable slurry seal emulsifier manufacturer for highway or pavement preservation projects?

Contact HDC Materials for product data, sample evaluation and bulk supply options for cationic slow-setting asphalt emulsifier.

Request Technical Data and Bulk Pricing

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