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Premium Gypsum Solutions

LANDU Gypsum Additives

Eteres de Celulose RDP Retarders

LANDU is a trusted manufacturer of high-performance cellulose ethers (CE), redispersible polymer powders (RDP), and gypsum retarders. Our additives are engineered to improve workability, adhesion, sag resistance, and crack prevention for both hand-applied and machine-applied gypsum systems.

Hand-Applied Systems
Machine-Applied Systems
Interior Finishing
Additives Range: CE / RDP / Retarders
Application: Sistemas de Gesso
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Smooth application
Superior Adhesion
Strong bonding
Sag Resistance
Vertical stability
Crack Prevention
Durabilidade a longo prazo
Optimized Water Retention
Controlled Setting Time
Excellent Surface Finish
Enhanced Mechanical Strength

What Are Gypsum Additives?

Gypsum additives such as HPMC, HEMC, RDP, and gypsum retarders are essential for high-quality plaster, jointing, and trowelling compounds.

Cellulose Ether
CE

Cellulose Ether

Improves water retention, prevents rapid drying, and enhances workability. Ensures smooth application and reduces tool sticking.

Retenção de Água
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Smooth Application
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Pó de Polímero Redispersível
RDP

Pó de Polímero Redispersível

Enhances adhesion, flexibility, and long-term durability.

Superior Adhesion
Enhanced Flexibility
Long-term Durability
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Retardador de Gesso
Retardador

Retardador de Gesso

Controls setting time for consistent workability and curing.

Controlled Setting Time
Consistent Workability
Optimized Curing
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Benefícios principais

Smooth, crack-free surfaces
Superior workability and spreadability
Excellent anti-sagging performance
Enhanced adhesion and structural integrity

Typical Applications of Gypsum Additives

01

Hand-Applied & Machine-Applied Plaster

Hand-applied plasters for small areas, renovations, or touch-ups
Machine-applied plasters for continuous mixing and application (typical thickness ~10mm)
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Trowelling Compounds
02

Trowelling Compounds

Level uneven walls or ceilings
Smooth, paintable finishes
Ideal for plasterboards, concrete walls, or gypsum ceilings
03

Joint Filling & Adhesives

Fill gaps between gypsum boards
Secure mounting of plasterboards on masonry
Maintain structural integrity of walls, especially in renovation projects
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Argamassas à base de gesso
04

Argamassas à base de gesso

Interior and exterior plaster systems
High water-cement ratio mortars
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01

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02

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03

Crack Resistance

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04

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Etercelulose Landercoll

Landercoll®

Cellulose Ether

Produto Aplicação Recomendada Desempenho
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Novastar™

Retardador de Gesso

Grau Aplicação
P300 Gypsum-based systems for controlled setting time

Preciso™

Redispersible Polymer Powder (Optional)

Three specialized formulations for different performance requirements

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Rígido
5011N

Maximum Structural Strength

Enhanced adhesion to substrates
Superior structural integrity
Ideal for load-bearing applications
Best For: Heavy-duty gypsum systems
Accurate 4025N Semi-flexible
Semi-flexible
4025N

Balanced Performance

Optimal flexibility for crack prevention
Maintains structural stability
Versatile for various substrates
Best For: General-purpose applications
Accurate 5045N Flexible
Flexible
5045N

Ultimate Flexibility

Maximum crack resistance
Superior durability in movement zones
Excellent for dynamic substrates
Best For: High-movement areas

Recommended Combination for Optimal Gypsum Performance:

HEMC EM100 + Gypsum Retarder P300 + RDP (Choose based on application)

Why Choose LANDU?

Experience

Over a decade of experience in construction chemical additives

Certification

ISO 9001 certified and EU REACH compliant

Laboratório de P&D

Advanced R&D laboratories for formula optimization

Global Supply

Global supply capabilities and reliable logistics

Free Sample & Technical Support

Experience the performance of LANDU Gypsum Additives before purchasing:

Free samples (200g–600g) of HEMC EM100, RDP 5011N, Gypsum Retarder P300
Technical data sheets (TDS) and application guides included
Formula recommendations and expert guidance for customized gypsum solutions
Free Sample Package
Free Shipping
Expert Support

FAQ – Gypsum Additives

Common questions about LANDU gypsum additives and their applications

Q1

What is the difference between HPMC and HEMC in gypsum applications?

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