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💧 Waterproofing Solutions

Waterproof Mortar Additives

LANDU Construction Chemicals

High‑Performance Polymer Additives for Cementitious Waterproofing Systems

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What Is Waterproof Mortar?

Waterproof mortar is a cement‑based mixture designed to prevent moisture penetration while maintaining strong adhesion and durability. Commonly used in basements, bathrooms, water tanks, swimming pools, and exterior walls, it forms a dense layer that resists water ingress.

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Advanced Formula

Unlike ordinary mortar, waterproof mortar contains functional chemical additives—such as cellulose ether (HPMC / MHEC), redispersible polymer powder (RDP), and polycarboxylate superplasticizer (PCE)—that enhance impermeability, flexibility, and long‑term strength.

🏠 Basements
🚿 Bathrooms
💧 Water Tanks
🏊 Swimming Pools
🏢 Exterior Walls
Waterproof Mortar Application
✓
Proven Performance Professional Grade
🛡️
Impermeability

Blocks moisture penetration

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Flexibility

Resists cracking & movement

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Long-Term Strength

Durable protection

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Why Additives Matter in Waterproof Mortar

Performance additives are crucial for achieving a truly waterproof, crack‑resistant mortar. They modify the cement matrix to improve bonding, flexibility, and surface durability.

01
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HPMC / MHEC

Cellulose Ether

  • • Retains moisture for full cement hydration
  • • Improves workability, viscosity, and anti‑sag performance
  • • Extends open time for convenient application
  • • Enhances adhesion strength and surface consistency
02
🛡️

RDP

Redispersible Polymer Powder

  • • Boosts tensile and bonding strength
  • • Provides flexibility and crack resistance
  • • Increases hydrophobicity and weather durability
  • • Enhances film formation for long‑lasting waterproof layers
03
⚗️

PCE

Polycarboxylate Ether Superplasticizer

  • • Reduces water demand without affecting workability
  • • Increases mortar density and cohesion
  • • Improves impermeability by minimizing capillary pores
  • • Enhances flow for easier application and compaction
🎯 Versatile Solutions

Applications of Waterproof Mortar Additives

LANDU additives are designed for modern cementitious waterproofing applications, including:

✓
Interior and exterior waterproof plaster
✓
Waterproof tile adhesive and tile grout systems
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Cementitious waterproof coatings and membranes
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Swimming pools, basements, water tanks, and reservoirs
✓
Concrete repairs and protective overlays
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With their advanced chemical properties, our additives provide reliable performance across varying cement types, sand gradations, and climatic conditions.

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Swimming Pools

Professional waterproofing

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Basements

Moisture protection

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Bathrooms

Water-resistant coating

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Water Tanks

Long-term sealing

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Exterior Walls

Weather resistance

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Repairs

Protective overlay

🧪 Product Range

Types of Waterproof Mortar Additives from LANDU

Complete chemical solutions for high-performance waterproofing systems

01
LANDERCOLL HPMC K200

LANDERCOLL® HPMC K200

Cementitious Rheology Modifier

Optimize Water Retention and Workability

LANDERCOLL® HPMC K200 offers superior moisture retention and smooth application performance. It ensures steady curing, improved bonding strength, and even mortar consistency, making it essential for waterproof and repair mortars.

Key Benefits:
  • ✓ Excellent water retention for complete hydration
  • ✓ Anti‑sag and easy troweling on vertical applications
  • ✓ Extended open time and smooth application flow
  • ✓ Improved bonding on porous and non‑porous surfaces
02
ACCURATE RDP 8035H

ACCURATE™ RDP 8035H

Hydrophobic Redispersible Polymer Powder

Flexible, Durable, and Water‑Resistant Polymer Additive

ACCURATE™ 8035H RDP enhances mortar flexibility and adhesion while imparting superior hydrophobic properties. It is widely recommended for exterior coatings, bathroom walls, and waterproof plaster formulations.

Key Benefits:
  • ✓ Outstanding waterproof and crack‑resistant performance
  • ✓ Improved tensile and flexural strength
  • ✓ Enhanced flexibility for deformation resistance
  • ✓ Excellent dispersion and film formation
03
LANDU PCE 570P

LANDU PCE 570P

High‑Range Polycarboxylate Superplasticizer

For High‑Density, Impermeable Mortar Systems

LANDU PCE 570P reduces water demand while increasing flowability and compactness. It helps create high‑density mortars with superior impermeability and cohesion.

Key Benefits:
  • ✓ Increased strength at lower water‑cement ratios
  • ✓ Improved self‑leveling and pumpability
  • ✓ Reduced shrinkage and porosity
  • ✓ Enhanced long‑term waterproofing durability
04
NOVASTAR Silicone Hydrophobic Powder

NOVASTAR™ Silicone Hydrophobic Powder

SHP - Surface Water Repellency

Surface Water Repellency & Efflorescence Control

NOVASTAR™ SHP forms a protective hydrophobic barrier inside the mortar matrix, preventing water absorption and minimizing efflorescence.

Key Benefits:
  • ✓ Excellent water repellency in wet areas
  • ✓ Protection against salt formation and discoloration
  • ✓ Improved freeze‑thaw resistance for outdoor use
05
LANDU Defoamer Powder

Defoamer Powder

Air Elimination Additive

Air‑Free, Smooth Surface Finish

Defoamer minimizes air entrapment during mixing for a dense, uniform surface—essential for decorative waterproof mortars.

Key Benefits:
  • ✓ Prevents pinholes and voids
  • ✓ Enhances compressive strength
  • ✓ Provides compact, aesthetic finishes
📊

Recommended Dosage Guidelines

Additive Typical Dosage Range Application Remarks
HPMC / MHEC 0.2 – 0.5 % by cement weight Improves water retention and open time
RDP 8035H 2 – 5 % Enhances flexibility and hydrophobicity
PCE 570P 0.3 – 0.8 % Reduces water demand for denser mortar
NOVASTAR SHP 0.2 – 0.5 % Adds surface water repellency and anti‑efflorescence
Defoamer 0.05 – 0.2 % Removes air bubbles for smooth finish
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Actual dosage depends on sand gradation, cement type, and performance target. For optimization, please consult LANDU's technical team.

LANDU Manufacturing Facility
20+ Years
75K Tons/Year
⭐ Industry Leader

Why Choose LANDU Waterproof Mortar Additives

🏆

20+ Years of Expertise

in cellulose ether and polymer technologies

📦

Full Product Portfolio

HPMC, MHEC, RDP, PCE, SHP, Defoamer

✓

ISO 9001 & EU REACH Certified

manufacturing facilities

⚙️

Custom OEM Formulations

for various climates and raw materials

🏭

75,000 tons Annual Output

with global logistics network

🔬

Advanced QC System

MVR, DSC, and SIS analysis for consistent quality

🎁 Try Before You Buy

Experience LANDU Quality

Request Free Samples Today

Test LANDU additives directly in your waterproof mortar formulations to validate performance before ordering in bulk.

Sample Package Includes:

  • 📦 200 – 600 g of requested products
  • 📄 Product brochure and TDS (Technical Data Sheet)
  • 📊 Dosage and formulation guidance
  • 👨‍🔬 Customized support from LANDU R&D engineers

Why Try LANDU Samples?

✓ Test product compatibility and waterproofing efficiency
✓ Optimize dosage based on your material system
✓ Receive guidance for max adhesion, density, and hydrophobicity
📩

Request Your Free Sample Now

Global Express Delivery via FedEx / DHL

Get Free Sample →
LANDU Free Sample
🎁
Free Samples Available Worldwide
LANDU Technical Support
🔬
R&D Labs State-of-the-Art
🎯 Expert Assistance

LANDU Technical Support & R&D Capabilities

🔬

Two State‑of‑the‑Art Laboratories

for formulation improvement and application testing

👨‍🔬

Professional Technical Guidance

for waterproof systems and cementitious coatings

⚙️

Customized Product Development

based on local material analysis and performance benchmarks

🤝

Dedicated After‑Sales Service

to ensure seamless production integration

Contact Technical Team → 📞 Schedule Consultation
❓ Common Questions

Frequently Asked Questions

Waterproof Mortar Additives

Q1

Which additive improves both waterproofing and flexibility?

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Answer:

Use a combination of RDP 8035H and HPMC K200 for optimal bonding and flexible waterproof films.

Q2

How do I enhance waterproof performance in harsh environments?

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Answer:

Add NOVASTAR™ SHP hydrophobic powder and PCE 570P for higher density and water repellency.

Q3

What is the ideal HPMC dosage for waterproof mortar?

⚖️
Answer:

Typical usage is 0.2 – 0.5 % by cement weight depending on viscosity and workability.

Q4

Can LANDU provide formulation guidance?

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Answer:

Yes. Our R&D team supports full formulation development and performance optimization.

Q5

Do you offer free samples and technical data sheets?

🎁
Answer:

Absolutely. LANDU provides 200 – 600 g sample kits along with comprehensive TDS and consultation.

Q6

Are your products internationally certified?

✓
Answer:

Yes. All LANDU additives are manufactured under ISO 9001 and EU REACH compliance standards.

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Still Have Questions?

Our technical team is ready to assist you with customized solutions and expert guidance.

📞 Contact Technical Team →
LANDU Professional Team
🤝
Professional Team Ready to Assist
🌟 Partner with Excellence

Why Contact LANDU?

✓

Free samples for performance validation

Test our additives in your actual formulations

✓

Tailor‑made formulation and dosage support

Customized solutions for your specific needs

✓

OEM branding & custom packaging available

Build your brand with our quality products

✓

Reliable worldwide shipping and technical service

Global logistics with expert support

🌍

Build Stronger, More Durable Waterproof Mortars with LANDU Additives

Send Inquiry Now → 🎁 Request Free Sample
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