Self-leveling Crack Filler

Self-leveling Crack Filler for Concrete Cracks and Horizontal Joints

Pourable, high-performance sealants designed for horizontal concrete repairs, expansion joints, and industrial floor maintenance. Engineered for controlled flow, high elasticity, substrate adhesion, and long-term weather resistance.

We supply wholesale formulations, OEM/private-label packaging, and comprehensive technical documentation (TDS, SDS, COA) for regional distributors, civil contractors, construction material brands, and project procurement teams.

Technical Performance

Product Grade	Primary Chemical Base	Movement Capability	Tack-Free Time (23°C, 50% RH)	Shore A Hardness	Key Application & Feature
Standard Elastic Grade	Polyurethane / MS Polymer	±25% (ASTM C719)	45–90 minutes	25–35	Expansion joints, driveways, sidewalks, and outdoor concrete slabs.
Rapid-Cure Industrial Grade	Hybrid Polyurethane / Epoxy	±12.5% to ±25%	15–30 minutes	40–50	Warehouses, parking decks, and logistics centers requiring fast traffic reopening.
High-Movement Outdoor Grade	Advanced MS Polymer / Silicone	±50% (ASTM C719)	30–60 minutes	20–30	High thermal expansion areas, bridge decks, and extreme UV environments.
OEM / Custom Formulation	Tailored (1K / 2K)	Configurable	Adjustable	Configurable	Customized viscosity, cure profile, color matching, and private-label packaging.

Engineered for Job-Site Performance & Structural Integrity

Controlled Flow & Depth Penetration

Liquid consistency allows autonomous filling of narrow or irregular cracks (3 mm to 25 mm wide) without manual tooling, reducing labor time.

Joint Movement Accommodation

Cured sealants absorb thermal contraction, expansion, and structural vibration, preventing adhesive or cohesive failure over time.

Water & Chemical Isolation

Seals open joint pathways against water ingress, deicing salts, oil spills, and freeze-thaw degradation.

High Surface Uniformity

Natural self-leveling action provides a clean, flush repair finish suitable for foot and vehicle traffic.

Substrates & Application Guide

Substrate	Compatibility	Surface Preparation Requirement
Cured Concrete / Screed	High	Clean, dry or damp-tolerant (grade-specific), free of dust and laitance.
Brick & Masonry	High	Remove loose mortar; primer recommended for high-porosity surfaces.
Metals (Steel / Aluminum)	Good	Solvent wipe; evaluate specific primer requirements for coated metals.
Asphalt	Moderate (Grade-specific)	Requires specific asphalt-compatible MS polymer formulation.

Standard Installation Steps

Joint Preparation:

Clean the crack/joint using wire brushing, oil-free compressed air, or concrete grinding to remove dust, oil, and old sealant.

Joint Geometry Control

For deep joints (depth exceeding $12\text{ mm}$), insert a closed-cell polyethylene backer rod to establish a proper 2:1 width-to-depth ratio and prevent three-sided adhesion.

Dispensing

Apply the product continuously into the joint using a manual, pneumatic, or electric caulking gun, or bulk dispensing equipment.

Self-Leveling Phase

Allow the material 5 to 15 minutes to level autonomously and purge entrapped air bubbles before initial skin formation.

Curing Period

Protect the applied area from rain, heavy dust, and traffic until the surface reaches functional cure according to the technical data sheet.

Technical Specifications

Property	Standard Test Method	Typical Specification Range
Product Type	—	One-component (1K) moisture-cure / Two-component (2K) rapid-cure
Appearance	Visual	Smooth, pourable liquid; Gray, Black, White, or Custom colors
Density	ASTM D1475	1.25–1.45 g/cm³
Viscosity	Rotational Viscometer	15,000–35,000 mPa·s (Self-leveling Grade)
Tensile Strength	ASTM D412 / ASTM C1135	1.2–2.5 MPa
Elongation at Break	ASTM D412	350–650%
Application Temperature	—	+5°C to +40°C
Service Temperature Range	—	−40°C to +90°C
Standard Compliance	ASTM C920	Type S, Grade P, Class 25 / Class 50, Uses T, M, O

Quality Control & Manufacturing Guarantee

Raw Material Verification

Testing incoming polymers, plasticizers, and fillers for moisture content, viscosity, and chemical purity.

In-Line Process Control

Vacuum mixing under automated temperature and speed control to ensure bubble-free batch consistency and dispersion.

Finished Batch Testing

Every production lot is tested for density, tack-free time, slump/flow rate, Shore A hardness, and tensile properties prior to release.

Batch Traceability

Every cartridge, sausage, or drum is inkjet-coded with batch numbers linked to retained factory samples and Certificate of Analysis (COA) records.

OEM / Private Label & Packaging Solutions

We offer comprehensive manufacturing solutions for importers, private-label brands, and construction chemical distributors:
Packaging Formats:

300 ml / 310 ml HDPE Cartridges (Aluminum / Plastic Foil Seal)
400 ml / 600 ml Aluminum Foil Sausages
20 L Pails / 200 L Steel Drums for Bulk Operations

Customization Options:

Custom color matching (RAL color chart compliance)
Formulation tuning (viscosity, tack-free time, modulus, hardness)
Private-label artwork printing, branded cartons, and pallet packaging
Full technical file support (TDS, SDS in multilingual formats, REACH / RoHS statements)

FAQ

Q: What is the difference between Grade P (Pourable) and Grade NS (Non-sag) sealants?

A: Grade P (Pourable/Self-leveling) sealants are fluid materials formulated specifically for horizontal joints, leveling out under gravity. Grade NS (Non-sag) sealants are thick pastes designed for vertical walls and overhead cracks where flow must be prevented.

Q: Do you provide ASTM C920 test reports and COA with each shipment?

A: Yes. We supply a batch-specific Certificate of Analysis (COA) with every shipment. ASTM C920 third-party laboratory test reports and technical data sheets (TDS) are available upon request for project submittals.

Q: What is the typical shelf life and storage requirement?

A: Standard 1K polyurethane and hybrid sealants have a shelf life of 12 months when stored in original, unopened packaging below 25°C in a cool, dry environment.

Q: What are the Minimum Order Quantities (MOQ) for OEM / Private Labeling?

A: Standard OEM orders begin at 3,000 cartridges (300 ml) or 1,500 foil sausages (600 ml) per color/formulation. Bulk drum supply MOQs are evaluated per shipment.

Q: Can this sealant be applied to damp concrete substrates?

A: Certain hybrid MS polymer grades exhibit strong adhesion to damp concrete without priming. Polyurethane formulations generally require completely dry surfaces or specific primers to prevent foaming during cure.

Request Technical Data & Wholesale Pricing

Partner with a direct manufacturer to secure reliable product performance, competitive volume pricing, and custom OEM packaging.

Submit your project specifications, annual quantity requirements, or private-label request below. Our technical team will respond within 24 hours with product recommendations and samples.

[ Request TDS & Free Samples ] [ Get OEM / Bulk Price Quote ]

We are one of the most professional self-leveling crack filler manufacturers in China, featured by quality products and good service. Please rest assured to wholesale high-grade self-leveling crack filler in stock here and get pricelist from our factory. We also accept customized orders.

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