Exterior Wall Levelling Putty by JOSME is a single-component inorganic mineral-based material, specially used for substrate smoothing and stabilization before exterior wall decorative and protective coating construction. Modified with rubber powder and reinforcing additives, the finished putty layer features dry tensile adhesive strength ≥0.60 MPa and wet tensile adhesive strength ≥0.40 MPa after water immersion. The product supports conventional exterior wall renovation and new building construction, with a coverage of 1.2–2.5 kg/㎡ and 25kg export packaging for batch engineering procurement.
Exterior Wall Levelling Putty is a polymer-modified cement-based base coat material. It is mainly applied to level uneven exterior substrates including concrete, cement mortar and brick walls, providing a flat base for subsequent decorative and functional topcoats.
Several typical wall foundation issues in external construction are resolved by this solution. It enhances the adhesion condition of coatings on porous and uneven wall surfaces, covers microcracks brought on by thermal expansion and contraction, and suppresses residual substrate alkalinity to prevent long-term paint film damage. It creates flat, hydrophobic, and chemically stable base layers after curing to provide consistent overall coating system performance throughout the year.
| Parameter | Value / Description |
|---|---|
| Packaging | 25 kg per bag |
| Recommended Consumption | 1.2–2.5 kg/㎡ |
| Application Thickness per Pass | 1–1.5 mm recommended |
| Dry Tensile Adhesive Strength | ≥0.60 MPa |
| Wet Tensile Adhesive Strength (after immersion) | ≥0.40 MPa |
| Topcoat Waiting Time | 7 days, or moisture content ≤10%, pH ≤10 |
| Storage Temperature | 5°C to 35°C |
| Storage Conditions | Cool and dry place |
| VOC Content | Low-VOC, water-based |
| Compliance Reference | JG/T 157 or local equivalents |
Easy Single-Component Blending The single-component recipe doesn't need complicated multi-component proportioning; it only requires on-site mixing with clean water.
Minimal Shrinkage Effectiveness By preventing plastic shrinkage during the curing process, the composition reduces the likelihood of tiny hairline fractures after construction.
Stable Bonding of Substrates The inorganic mineral structure successfully bonds to a variety of wall substrates. Under prolonged external exposure, the cured layer prevents powdering, hollowing, and delamination.
Water Resistance: The cured surface creates a hydrophobic barrier that prevents outside moisture penetration, lowering the danger of wall blistering brought on by freeze-thaw cycles, humid environments, and rainfall erosion.
Low-VOC Water-Based Formula The water-based system has a low VOC content, making it appropriate for projects that adhere to green building regulations and for on-site work in inhabited areas.
Commercial Facades at High Rises It is used for metallic paint, matching fluorocarbon paint, base leveling of high-rise commercial structures, and other long-lasting topcoat systems.
Heritage Restoration and Urban Renovation Ideal for restoring ancient buildings and renovating aged walls. It unifies substrate flatness, fills in structural microcracks in aged masonry, and doesn't put additional strain on building envelopes.
Coastal and Residential Construction For textured coatings and stone-imitation finishes, it provides a solid leveling foundation. It shields the ornamental coating layer and inhibits wall efflorescence in coastal areas with high humidity and intense UV radiation.

Incoming raw material inspection, manufacturing process monitoring, and final Exterior Wall Levelling Putty testing are all part of JOSME's full-process quality management system. To maintain consistency in particle size, bonding performance, and construction workability throughout all manufacturing batches, batch sample retention is used.

JOSME holds complete system and product certifications to support global engineering and export cooperation, including ISO 9001 Quality Management System, ISO 14001 Environmental Management System, ISO 45001 Occupational Health and Safety System, ISO 50001 Energy Management System, China Environmental Labelling Certification and China Green Product Certification.
We can provide complete supporting documents such as MSDS, product test reports and technical data sheets upon customer request.

The product adopts 25kg reinforced export-grade packaging, which can resist leakage and structural damage during ocean transportation and long-distance logistics.
Lead Time: Standard products: 2–3 working days Custom formula, color matching and private label orders: 7–15 working days
We support production capacity reservation for large-scale project orders, and provide sea, air and land freight services with complete customs declaration and cargo tracking support.
Q1: What topcoat systems can this exterior putty match?
A1: It is compatible with sand textured coatings and most conventional exterior functional coatings on concrete and cement mortar substrates. You can refer to the official TDS for detailed matching schemes.
Q2: Will the putty layer powder or delaminate after long-term outdoor use?
A2: The inorganic mineral formula forms stable bonding and water resistance after curing. With standard substrate treatment and construction process, the finished layer will not powder, hollow or delaminate.
Q3: What is the difference between single-component and two-component putty in actual use?
A3: Single-component products simplify on-site mixing and avoid manual proportioning errors. All performance parameters are tested and verified under standard conditions to meet conventional exterior wall construction standards.
Q4: How long should I wait before topcoat construction?
A4: The topcoat can be constructed after 7 days of curing, or when the wall moisture content is below 10% and pH value drops below 10%.
If you have inquiries about parameter matching, sample testing, project quotation and bulk procurement for Exterior Wall Levelling Putty, please contact our professional team via [email protected].