Crack-resistant mortar square-bottom valve‑type woven bag / Durable, leak‑proof square-bottom valve‑type putty packaging bag / Laminated, moisture‑proof, crack‑resistant valve‑type woven putty bag
Category:
Description:
Product Introduction
Exterior wall crack-resistant putty is a cement-based or polymer-modified putty specially formulated for leveling and crack resistance on exterior wall substrates, suitable for applications on concrete, cement mortar, and crack-resistant mortar layers.
Applicable Subjects
Construction contractors, interior decoration companies, paint distributors, real estate development projects
Exterior walls of new buildings, renovation of existing walls, and crack-resistant layer of external wall external thermal insulation systems.
Product positioning
A mid-to-high‑end exterior wall primer, designed to deliver superior crack resistance and construction efficiency, ideal for exterior coating projects that demand exceptional durability and smooth surface finish.
Core Advantages
High-strength crack resistance: The addition of polymer powder and short fibers effectively inhibits the formation of microcracks.
Easy to apply: smooth spreading, excellent water retention, and low drying shrinkage.
Excellent compatibility: Works well with exterior wall primers, textured stone paints, and multi‑color paints.
Material and Craftsmanship
Main ingredients: white cement/gray cement, graded quartz sand, heavy calcium carbonate, redispersible latex powder, hydroxypropyl methylcellulose, and crack‑resistant fibers.
Process: Automatic metering, gravity-free mixer with high-speed dispersion, ensuring uniformity and stability in every batch.
Tensile strength (flexural/compressive)
Bond strength under standard conditions ≥ 0.6 MPa
Bond strength after freeze–thaw cycles ≥ 0.4 MPa
Flexural strength ≥ 2.5 MPa (in compliance with JG/T 157-2009, Type P standard)
Moisture-proof rating
The packaging bag is made of a three‑in‑one paper‑plastic composite bag or a woven bag lined with a moisture‑proof film, and can be stored for short periods under conditions of relative humidity ≤80%.
The product is water-resistant (water resistance ≥ 24 hours with no abnormalities), but it is recommended to store it in a cool, dry place and avoid direct contact with the ground.
Packaging drop test
Complies with GB/T 4857.5-92: When dropped freely from a height of 1 meter onto a cement floor, the bag shall show no rupture and no severe powder leakage (minor openings at the corners are permissible, provided the powder leakage rate does not exceed 1%).
Applicable filling method
Supports pneumatic filling, screw‑type valve‑mouth packaging machines, and gravity‑fed open‑bag packaging lines.
Packaging Specifications
Nominal net weight: 25 kg ± 0.5 kg (as shown in the image)
Bag type: valve bag or open-mouth bag with a sewn bottom, approximately 45×70 cm in size.
Customization Scope
Bag‑side printing: Customizable with your logo, product name, installation instructions, QR codes, and more (minimum order quantity: 3,000–5,000 units).
Net content: Customizable in 20 kg, 30 kg, and 40 kg specifications.
Formulation: Fineness, whiteness, and setting time are adjustable (minimum order quantity required).
Environmental Compliance
Meets the requirements for putty stipulated in GB 18582-2020 “Limit of Harmful Substances in Wall Coatings for Building Use.”
Formaldehyde- and benzene‑related compounds are not added; VOCs were not detected, meeting the green building material evaluation standards.
Price and Minimum Order Quantity
Specific pricing and minimum order quantities are negotiable. Please feel free to call or write to inquire.
Keywords:
Crack-resistant mortar square-bottom valve‑type woven bag / Durable, leak‑proof square-bottom valve‑type putty packaging bag / Laminated, moisture‑proof, crack‑resistant valve‑type woven putty bag
CERTIFICATE
20 years of production experience in the packaging woven bag industry
Advantages
We possess large-scale production capabilities, enabling us to handle substantial orders and ensure timely delivery.
Premium Quality
Adhering to strict global benchmarks for unparalleled durability and reliability
Competitive Pricing
World-class products at cost-effective rates for businesses of all sizes
Expert Team
Skilled professionals delivering top-quality results
Custom Solutions
Bespoke products designed to meet your specific needs
Process of Production
Pursuing development through technological innovation, Prioritizing quality in service
1
Making yarn PP
2
Weaving
3
Laminate
4
Printing/Membrane
5
Cutting/Sewing
6
Blown PE
7
Insert PE, Packing
8
Product
Applications
Delivering high-quality packaging that exceeds customer expectations
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