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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), pulbere de polimer redisperbilă (RDP), și polycarboxylate superplasticizer (PCE)—that enhance impermeability, flexibility, and long‑term strength.

Basements

Bathrooms

Water Tanks

Swimming Pools

Exterior Walls

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Proven Performance Professional Grade

Impermeability

Blocks moisture penetration

Flexibilitate

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

Eter Celulozic

• 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

Pulbere de Polimer Redispersibilă

• 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:

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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

Protecție împotriva umidității

Bathrooms

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Water Tanks

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Exterior Walls

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Product Range

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Beneficii Cheie:

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ACCURATE™ RDP 8035H

Pulbere de Polimer Hidrofobă Redispersibilă

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.

Beneficii Cheie:

✓ 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.

Beneficii Cheie:

✓ 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

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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.

Beneficii Cheie:

✓ Excellent water repellency in wet areas
✓ Protection against salt formation and discoloration
✓ Improved freeze‑thaw resistance for outdoor use

05

LANDU Defoamer Powder

Pulbere antifoamant

Air Elimination Additive

Air‑Free, Smooth Surface Finish

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

Beneficii Cheie:

✓ 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 %	cURL Too many subrequests.

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LANDU Manufacturing Facility

20+ Years

75K Tons/Year

Industry Leader

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Certificat ISO 9001 și EU REACH

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Încearcă înainte de a cumpăra

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Pachetul de mostre include:

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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

Solicită acum mostra gratuită

Global Express Delivery via FedEx / DHL

Get Free Sample →

Mostră gratuită LANDU

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Suport tehnic 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

Contactați echipa tehnică →

Schedule Consultation

Întrebări frecvente

Întrebări frecvente

Waterproof Mortar Additives

Q1

Which additive improves both waterproofing and flexibility?

Răspuns:

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

Q2

How do I enhance waterproof performance in harsh environments?

Răspuns:

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

Q3

What is the ideal HPMC dosage for waterproof mortar?

Răspuns:

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

Q4

Can LANDU provide formulation guidance?

Răspuns:

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

Q5

Do you offer free samples and technical data sheets?

Răspuns:

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

Q6

Are your products internationally certified?

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Răspuns:

Yes. All LANDU additives are manufactured under ISO 9001 și EU REACH cURL Too many subrequests.

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