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Premium Gypsum Solutions

LANDU Gypsum Additives

Éteres 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
Enhanced Workability
Smooth application
Superior Adhesion
Strong bonding
Resistência à Queda
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
Enhanced Workability
Smooth Application
Learn More →
Polímero em Pó Redispersível
RDP

Polímero em Pó 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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Principais benefícios

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)
Hand-Applied & Machine-Applied Plaster
Trowelling Compounds
02

Trowelling Compounds

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Joint Filling & Adhesives
Argamassas à Base de Gesso
04

Argamassas à Base de Gesso

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Uniform hydration reduces shrinkage stress
Prevents microcracks for long-lasting finish
04

Enhanced Adhesion & Durability

RDP improves bonding to substrates
Gypsum retarders ensure consistent set times
05

Cost Efficiency & Higher Yield

Optimized water retention reduces gypsum powder usage
Maintains workability for large-scale applications

Selection Guide – Recommended Products

Etercelulose Landercoll

Landercoll®

Cellulose Ether

Produto Aplicação Recomendada Performance
HEMC EM100 Hand-Applied Plaster / Gypsum Putty Excellent water retention, smooth application, extended open time
Novastar Gypsum Retarder

Novastar™

Retardador de Gesso

Classificação Aplicação
P300 Gypsum-based systems for controlled setting time

Accurate™

Redispersible Polymer Powder (Optional)

Three specialized formulations for different performance requirements

Accurate 5011N Rigid
Rigid
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
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Experience

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Certification

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Laboratório de P&D

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Global Supply

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Suporte Especializado

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Q1

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Q2

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They control the setting time, preventing rapid hardening and ensuring smooth application and workability.

Q3

Can RDP powders be combined with cellulose ethers?

Yes. RDP + HEMC improves adhesion, flexibility, and crack resistance.

Q4

How should I store gypsum additives?

Keep in a cool, dry place, away from moisture and direct sunlight. Proper storage ensures consistent performance.

Q5

Are LANDU gypsum additives suitable for renovations?

Absolutely. Our joint fillers, trowelling compounds, and hand-applied plasters are ideal for renovation projects and small-scale applications.

Q6

Can LANDU assist with custom formulations?

Yes. Our technical team can provide tailored solutions, dosage guidance, and compatibility testing.

Q7

Do LANDU gypsum additives improve crack resistance?

Yes. Proper combination of HEMC + RDP + Gypsum Retarder reduces shrinkage stress and prevents microcracks.

Q8

How fast can I receive my order?

LANDU provides fast global delivery via FedEx or DHL for both small and bulk orders.

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