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Waterproof Mortar Additives

LANDU Construction Chemicals

High‑Performance Polymer Additives for Cementitious Waterproofing Systems

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.

Advanced Formula

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

Basements

Bathrooms

Water Tanks

Swimming Pools

Exterior Walls

Waterproof Mortar Application

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Proven Performance Профессиональный уровень

Impermeability

Blocks moisture penetration

Flexibility

Resists cracking & movement

Long-Term Strength

Durable protection

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

HPMC / MHEC

Эфир целлюлозы

• 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

Редиспергируемый полимерный порошок

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

03

ПЦЭ

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:

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Interior and exterior waterproof plaster

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Waterproof tile adhesive and tile grout systems

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Cementitious waterproof coatings and membranes

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Swimming Pools

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Basements

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Bathrooms

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Water Tanks

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Exterior Walls

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Product Range

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01

LANDERCOLL HPMC K200

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Key Benefits:

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ACCURATE RDP 8035H

ACCURATE™ RDP 8035H

Гидрофобный диспергируемый полимерный порошок

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

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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

Добавка	Typical Dosage Range	Application Remarks
HPMC / MHEC	cURL Too many subrequests. 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	cURL Too many subrequests.	Adds surface water repellency and anti‑efflorescence
Дефоамер	0,05 – 0,2 1ТП3Т	Removes air bubbles for smooth finish

Actual dosage depends on sand gradation, cement type, and performance target. For optimization, please consult cURL Too many subrequests..

LANDU Manufacturing Facility

20+ Годы

75K Tons/Year

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Try Before You Buy

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Sample Package Includes:

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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 →

Бесплатный образец LANDU

Бесплатные образцы Available Worldwide

Техническая поддержка LANDU

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

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Schedule Consultation

Common Questions

Часто задаваемые вопросы

Waterproof Mortar Additives

Q1

Which additive improves both waterproofing and flexibility?

Answer:

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

Q2

How do I enhance waterproof performance in harsh environments?

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 cURL Too many subrequests. by cement weight depending on viscosity and workability.

Q4

Can LANDU provide formulation guidance?

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

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Answer:

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Still Have Questions?

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