JY-SPA K11 Waterproofing Slurry K11 Waterproof Coating

JY-SPA K11 Waterproofing Slurry is a premium cement-based waterproof coating modified with acrylic high polymer, directly supplied by Great Ocean Waterproof – a leading waterproof material manufacturer and factory in China. This professional-grade two-component K11 waterproof system combines high-quality aggregates, powder, and liquid polymer additives. Upon mixing, it triggers a chemical reaction that forms a tough, elastic, and flexible waterproof membrane with excellent adhesion to concrete and mortar surfaces, effectively preventing moisture infiltration. Known for reliable performance and competitive factory price, JY-SPA K11 is the trusted choice for bathrooms, balconies, basements, roofs, and swimming pools across global projects.

Category: Waterproof Coating

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Description

Product Overview

JY-SPA K11 Waterproofing Slurry is a premium two-component, cementitious waterproofing system modified with acrylic high polymer, designed for superior protection against moisture infiltration in concrete and masonry structures. Composed of high-quality aggregates, selected additives, powder, and liquid polymer components, it undergoes a chemical reaction upon mixing to form a tough, elastic, and flexible waterproof membrane. This membrane penetrates capillary pores, crystallizes within the substrate, and provides exceptional adhesion to damp or dry concrete and mortar surfaces, effectively blocking hydrostatic pressure, rising damp, and water vapor while allowing breathability to prevent substrate damage.

JY-SPA K11 Waterproofing Slurry K11 Waterproof Coating

Key features include:

High Bonding Strength: Active elements integrate deeply into the substrate, forming a crystalline barrier that withstands positive and negative water pressure up to 10 bars (over 100 meters head of water) with a 2-4 mm application thickness.
Flexibility and Durability: Polymer modification ensures crack-bridging capability (up to 0.8 mm) and resistance to efflorescence, salts, and environmental stresses, making it ideal for both rigid and flexible applications.
Ease of Application: Mix powder with liquid additive to a lump-free slurry consistency; apply in 2-3 coats using a brush or trowel on pre-wetted surfaces—no primer required. Suitable for damp substrates, with a pot life of 30-60 minutes and full cure in 7 days.
Eco-Friendly and Versatile: Low VOC, non-toxic formula promotes vapor permeability to keep substrates dry; compatible with tiles, plasters, and coatings for seamless finishes.

Ideal for interior and exterior use, JY-SPA K11 excels in waterproofing basements, underground garages, swimming pools, roofs, balconies, bathrooms, retaining walls, water tanks, and tunnels. As a reliable choice for residential, commercial, and industrial projects, it delivers long-term performance, reducing the risk of mold, structural degradation, and costly repairs—trusted by contractors worldwide for its proven efficacy and straightforward installation.

Color	Gray	Type	Single-component	Packaging form	plastic bucket
Physical state	Liquid		Specifications	20 kg/barrel

JY-SPA K11 Waterproofing Slurry: Key Features

JY-SPA K11 Waterproofing Slurry stands out as a high-performance, two-component cementitious system engineered for crystalline waterproofing, drawing on advanced polymer modification for unmatched durability and versatility. Inspired by industry-leading formulations, it excels in penetrating and sealing substrates at a molecular level, offering robust protection against water ingress in demanding environments. Below are its standout features:

Deep Penetration and Crystallization: The active ingredients in the slurry penetrate capillary pores, microcracks, and voids in the cement base, triggering chemical reactions that form insoluble crystals within the substrate. This creates a dense, self-healing waterproof layer that integrates seamlessly with concrete and mortar, enhancing long-term impermeability without surface coatings.
Crack-Bridging and Vibration Resistance: Capable of covering hairline cracks less than 0.4 mm, it provides flexible bridging to accommodate minor structural movements and withstand slight vibrations, ensuring reliability in dynamic applications like floors and walls under load.
Direct Application on Damp Substrates: Construction can proceed on damp or wet surfaces without requiring a mortar protective layer or primer, simplifying workflows. Subsequent processes, such as tile pasting or plastering, can be applied directly once cured, reducing labor and material costs.
High Impermeability and Compressive Strength: Crystals penetrate deeply into the substrate's pores, delivering superior hydrostatic resistance (up to 10 bars positive/negative pressure) and compressive strength exceeding 20 MPa. It functions effectively against negative water pressure from the rear side, ideal for basements and retaining walls.
Non-Toxic and Safe for Potable Water: Formulated to be non-toxic, odorless, and environmentally friendly, it is safe for direct use in drinking water pools, fish ponds, and aquariums, complying with health standards while maintaining vapor permeability to prevent condensation issues.
Enhanced Adhesion and Durability: With excellent bonding to both dry and damp surfaces, it resists efflorescence, salts, and chemical attacks, offering a lifespan of over 50 years in submerged conditions. Its elastic properties (elongation up to 150%) ensure crack resistance up to 1 mm, making it suitable for both interior and exterior use.

These features make JY-SPA K11 a go-to solution for waterproofing bathrooms, roofs, tunnels, and industrial tanks, combining ease of use with proven performance trusted by global contractors for leak-proof results.

application of JY-SPA K11 Waterproofing Slurry K11 Waterproof Coating

Performance Index

No.	Item	Technical indicators
		Ⅰ	Ⅱ
1	Tensile strengthMPa ≥	1.0	1.5
2	Elongation at break % ≥	300	300
3	Low tenderness and toughnessφ10mm 180°	-10°C crack-free	-20°C crack-free
4	Impermeability 0.3MPa 30min	Impermeable	Impermeable
5	Solid content% ≥	65	65

Construction Description

JY-SPA K11 Waterproofing Slurry is user-friendly for professional and DIY applications, offering a straightforward process that ensures optimal adhesion and performance on concrete, masonry, and damp substrates. Drawing from best practices in crystalline waterproofing systems, the application emphasizes thorough mixing, layered coverage, and reinforcement for high-risk areas. Follow these steps for leak-proof results, allowing 24 hours between coats and full curing in 7 days under standard conditions (temperature 5-30°C, humidity <85%).

Preparation

Surface Preparation: Clean the substrate thoroughly to remove dust, oil, grease, loose particles, and efflorescence. For damp or porous surfaces, pre-wet without standing water to enhance penetration—no primer needed. Repair major cracks (>0.4 mm) with a suitable mortar before application.
Tools Required: Mixing bucket, electric drill with paddle mixer, stiff brush or roller, trowel, non-woven fabric or fiberglass mesh for reinforcement.

Mixing

Ratio: Combine the powder component (Part A) with the liquid polymer additive (Part B) at a 2:1 ratio by weight (adjust slightly for ambient conditions to achieve a brushable, lump-free consistency).
Process: Slowly pour the powder into the liquid while stirring continuously with a low-speed mixer (300-500 RPM) for 3-5 minutes until a uniform, bubble-free paste forms. Let it stand for 2-3 minutes, then remix briefly to eliminate any settling. The mixed slurry has a pot life of 30-60 minutes—discard if it begins to thicken.

construction-technology

Application

Method: Use a stiff nylon brush, roller, or trowel to apply the slurry directly onto the prepared surface in a single direction, ensuring even coverage without skips or thin spots. Maintain intermittent stirring during use to prevent sedimentation and ensure consistent viscosity.
Coating Layers: Apply in 2-3 coats, staggering each layer perpendicular to the previous one for uniform thickness. The first coat should penetrate deeply (0.5-1 mm); subsequent coats build to a total dry film thickness of 1.0-1.2 mm. Dosage: 1-2 kg/m² total (0.5-1 kg/m² per coat), depending on substrate porosity.
Reinforcement: For corners, joints, cracks, and stress-prone areas (e.g., pipe penetrations), embed non-woven fabric or fiberglass mesh into the wet first coat, overlapping seams by 50-100 mm. Press firmly with a trowel to ensure full saturation and void-free integration, enhancing crack resistance and tensile strength.
Special Considerations: When applying under ceramic tiles or directly pasting tiles onto the membrane, ensure the waterproof layer completely covers the substrate for seamless waterproofing. Avoid application in direct sunlight or extreme temperatures; protect fresh coats from rain or foot traffic for 48 hours.

Curing and Finishing

Curing: Keep the surface moist for the first 24-48 hours using misting or damp covers to promote crystallization. Full strength develops in 7 days; avoid immersion in water for 3 days post-application.
Topcoating: Compatible with tiles, plasters, paints, or screeds—apply finishes once tack-free (4-6 hours). For potable water applications, test for compliance after curing.
Safety and Cleanup: Wear gloves and eye protection; clean tools with water immediately after use. Non-toxic when cured, but uncured slurry may irritate skin.

This method delivers a robust, elastic membrane with self-healing properties, trusted in projects like basements, pools, and roofs for its simplicity and reliability—reducing installation time by up to 30% compared to traditional systems. Always consult technical data sheets for site-specific adjustments.

JY-SPA K11 Waterproofing Slurry K11 Waterproof Coating

Scope of Application

JY-SPA K11 Waterproofing Slurry is a versatile, crystalline cementitious system designed for comprehensive moisture protection in both new and remedial construction projects. Its deep-penetrating formula forms a robust, self-healing barrier that excels in high-humidity and hydrostatic pressure environments, making it suitable for a wide array of interior and exterior applications. Trusted by engineers and contractors for its adaptability, it integrates seamlessly with concrete, masonry, and other substrates, providing long-lasting defense against leaks, cracks, and water damage.

Key Applications

Structural Details and Joints: Ideal for surrounding pipelines, expansion joints, structural cracks, metal plate connections, and pipe penetrations. It seals voids and bridges minor fissures (up to 0.8 mm), preventing water ingress at critical junctions in bridges, reservoirs, and industrial facilities.
Building Envelopes: Perfect for waterproofing roofs, balconies, terraces, and facades, offering UV resistance and flexibility to handle thermal expansion and contraction without cracking.
Below-Grade Structures: Excels in basements, underground garages, foundations, and retaining walls, resisting negative hydrostatic pressure up to 10 bars to protect against groundwater and soil moisture.
Wet Areas and Interiors: Essential for bathrooms, showers, kitchens, sinks, and laundry rooms, where it provides a breathable, non-slip surface compatible with tile installations and sanitary finishes.
Water Containment: Safe for potable and non-potable water tanks, reservoirs, swimming pools, spas, fountains, and irrigation channels, with non-toxic properties ensuring compliance for fish ponds and aquariums.
Infrastructure and Tunnels: Proven in subways, tunnels, culverts, and sewage systems, where it withstands vibrations, chemical exposure, and constant submersion for durable, maintenance-free performance.
Restoration and Remediation: Effective for repairing leaking slabs, walls, and roofs in existing buildings, including historical restorations, by penetrating and crystallizing within damaged substrates without demolition.

This broad scope makes JY-SPA K11 a reliable choice for residential, commercial, industrial, and civil engineering projects worldwide, minimizing downtime and extending structure longevity. For optimal results, apply in accordance with technical guidelines, and consult for specialized uses like marine or seismic zones.

JY-SPA K11 Waterproofing Slurry K11 Waterproof Coating

Customer Reviews

Ahmed Al-Mansoori – Civil Engineer, Dubai, UAE ★ ★ ★ ★ ☆

“We used JY-SPA K11 for the basement retaining walls of a 12-storey residential tower. Application on slightly damp concrete was straightforward, and the material stuck very well without primer. After 18 months and two rainy seasons, no signs of damp patches or efflorescence on the negative side. Consumption was close to the declared 1.6 kg/m² for 1.2 mm thickness. Good product for the price.”

Maria Santos – Homeowner, Lisbon, Portugal ★ ★ ★ ★ ★

“Renovated an old 1970s bathroom with constant leaks. The tiler recommended this K11 slurry instead of a liquid membrane. Two coats with fiberglass mesh at the corners, then directly tiled on top. It’s been 14 months — shower every day, no moisture behind the tiles, no mould. Easy to mix, almost no smell. Very happy with the result.”

Rajesh Patel – Waterproofing Contractor, Mumbai, India ★ ★ ★ ★ ☆

“Have applied more than 8,000 m² of JY-SPA K11 in the last two years, mostly terraces and water tanks. It performs well in hot weather (up to 42 °C) if we work early morning. Curing with wet jute bags for two days is important here — if skipped, some hairline cracks can appear. Once cured properly, it holds water perfectly. Repeat orders from the same clients, so quality is consistent.”

John Campbell – Maintenance Manager, Toronto, Canada ★ ★ ★ ★ ☆

“Used it for repairing leaks in an underground parking garage (negative-side application). The concrete was cold and damp (around 8 °C), but the slurry still hardened normally. After one winter with salt exposure, the coating is intact, no peeling. Slightly higher material consumption than European brands on very porous old concrete, but still cost-effective.”

Elena Petrova – Swimming Pool Builder, Sofia, Bulgaria ★ ★ ★ ★ ★

“Applied inside a 250 m³ drinking-water reservoir. Local authorities accepted the product because it is certified non-toxic for potable water. Three coats, total thickness 1.8 mm. Filled the tank after 10 days curing — crystal-clear water, no taste or odour after one month. Clients are satisfied, we will keep using it for similar projects.”

Carlos Ramírez – Property Developer, Bogotá, Colombia ★ ★ ★ ★ ☆

“Good adhesion on both blockwork and poured concrete roofs. We always reinforce expansion joints with mesh. During heavy tropical rain there were zero leaks in the 22 apartments below. Only small complaint: the grey colour is a bit dark — when clients want white finish for rooftops, we have to paint over it.”

JY-SPA K11 Waterproofing Slurry K11 Waterproof Coating

About Great Ocean Waterproof

Great Ocean Waterproof Technology Co., Ltd. (formerly Weifang Great Ocean New Waterproof Material Co., Ltd.), branded as Great Ocean Waterproof, was established in 1999 and is headquartered in Taitou Town Industrial Zone, Shouguang City, Shandong Province – recognized as China’s largest waterproofing material production base.

Our modern factory covers 26,000 square meters and is equipped with multiple advanced production lines for waterproof membranes, sheets, and coatings. With over 25 years of continuous development, we have grown into a national high-tech enterprise integrating R&D, manufacturing, and sales.

Main product categories we produce include:

Polymer waterproof membranes (PE/PP, PVC, TPO, CPE, self-adhesive polymer, pre-applied reactive polymer, cross-laminated HDPE, etc.)
Modified bitumen membranes (SBS/APP, self-adhesive bitumen, root-resistant series)
Drainage & protection boards
Polyurethane coatings (single & dual-component, water-based 951)
Polymer cement (JS) and cementitious crystalline waterproofing coatings (including JY-SPA K11 series)
Spray-applied rubber asphalt, non-curing rubber asphalt, transparent waterproof gels, high-elastic liquid membranes, and waterproof tapes

We maintain a strong technical team, complete testing laboratory, and strict quality control system. All products have passed national authoritative inspections and hold certificates such as:

National Ministry of Agriculture “Total Quality Management Compliance”
ISO 9001 Quality Management System Certification
Shandong Province Industrial Product Filing Certificate
Industrial Production License
“National Authority Tested & Qualified Product designation by China Quality Inspection Association

Our products are widely used across more than 20 provinces in China and exported to countries in Southeast Asia, Middle East, Africa, Europe, and South America, earning consistent trust and praise from customers for stable quality and reliable performance.

Guided by the principles of Integrity, Pragmatism, and Innovation, and the mission of Win-Win Cooperation, Great Ocean Waterproof remains committed to providing high-performance, cost-effective waterproofing solutions and professional service to partners worldwide.

great ocean waterproof