Skim Coat & Wall Putty Additives | HPMC, RDP & HPS Solutions

Reliable Manufacturing. Customizable Solutions. Consistent Quality.

Improve water retention, smooth application and open time for better finishing performance.

Enhance adhesion, flexibility and crack resistance in cement-based wall formulations.

Improve anti-sagging performance and application consistency for smoother construction.

Common Problems in Skim Coat & Wall Putty Applications

Smooth application, good workability and crack resistance are essential for high-quality skim coat and wall putty formulations. However, issues such as poor water retention, fast drying, sagging and uneven surface finishing can affect both application efficiency and final appearance. Additives including HPMC, HEMC, RDP and HPS help manufacturers improve consistency, surface smoothness and overall application performance.

Benefits of Skim Coat & Wall Putty:

Smooth Surface Finishing

Improved Crack Resistance

Better Water Retention

Easier Application Performance

LANDU: Your Trusted Skim Coat & Wall Putty Manufacturer

LANDU specializes in high-performance additives for skim coat and wall putty applications. Our HPMC, HEMC, HPS and RDP products help manufacturers improve workability, water retention and crack resistance while achieving smoother surface finishing and more stable application performance.

Additive	Primary Function	Key Benefit
HPMC	Water retention	Prevents premature drying
HEMC	Workability enhancer	Smoother application
RDP	Binding agent	Improves adhesion and flexibility
HPS	Thickening agent	Enhances consistency
SHP	Waterproofing agent	Creates water-repellent surface

Request Free Sample

Get a free sample of any additive to test in your tile adhesive formula!

Landercoll® Skim Coat/Wall Putty Selection Guide

Cellulose Ether (Landercol®)

Brand	Product and grade	Performance
Landercol®	HPMC / HEMC
	K100 / EM100	Good workability; Good water retention
	K200 / EM200	Good workability; Good water retention
	K40H / EM40H	High water retention; Enhanced open time and operable time; Good workability
	K75H / EM80H	High water retention; Enhanced open time and operable time; Good workability
	K100H / EM100H	High water retention; Enhanced open time and operable time; Good workability
	K40HT / EM40HT	High water retention; Enhanced open time; Excellent workability; Improved slip resistance
	K75HT / EM80HT	High water retention; Enhanced open time; Excellent workability; Improved slip resistance
	K100HT / EM100HT	High water retention; Enhanced open time; Excellent workability; Improved slip resistance

Accurate™ Redispersible Polymer Powder

Type	Rigid	Semi-flexible	Flexible
Grade	5011N / 7118E	4025N / 7620E	5045N / 9055E

Typical Applications:

Interior and exterior applications
All types of substrates:
concrete, rendered surfaces, surfaces of thermal insulation systems, cement fiber board, bricks, AAC/ALC blocks, decorative mortar, etc.

Basic Additives for Four Types of Skim Coat/Wall Putty Formulations

The right additives in yourtile adhesive formula make all these properties possible. Therefore, selecting the proper ingredients is crucial for manufacturing reliable products.

HPMC (Hydroxypropyl Methyl Cellulose)

The Water Retention Expert

LANDERCOLL HPMC improves your tile adhesive formula by keeping water in the mix longer. This additive creates the perfect environment for cement hydration. As a result, your adhesive develops maximum strength. Also, HPMC extends open time, giving installers more flexibility during application.

How HPMC enhances your tile adhesive formula:

Adding just 0.2-0.3% HPMC to your tile adhesive formula can increase water retention by up to 98%, dramatically improving bond strength.” – LANDU Research Center

RDP (Redispersible Polymer Powder)

The Flexibility Provider

LANDERCOLL HEMC takes your tile adhesive formula to the next level. This premium additive combines excellent water retention with enhanced bonding strength. Furthermore, it creates a smoother, more workable mixture that spreads easily. Most importantly, HEMC reduces cracking and improves long-term durability.

Benefits of HEMC in your tile adhesive formula:

Adding 3-5% RDP to your tile adhesive formula can increase tensile adhesion strength by up to 300% compared to standard cement-based adhesives. This makes it perfect for large-format tiles and outdoor applications.

HEMC (Hydroxyethyl Methyl Cellulose)

Best for: Projects needing movement tolerance

Benefits of HEMC in your tile adhesive formula:

Learn More

HPS (Hydroxypropyl Starch Ether)

The Workability Improver

NOVASTAR HPS makes your tile adhesive formula more user-friendly. This rapid thickener creates the perfect consistency instantly. Therefore, installers can apply your product more easily. Also, HPS prevents sagging on vertical surfaces while maintaining excellent water retention. As a result, tiles stay in place during installation.

How HPS transforms your tile adhesive formula:

Learn More

Test Our Additives in Your Skim Coat/Wall Putty

We offer free samples of all additives for skim coat and wall putty formulations. You can test our HPMC, HEMC, HPS and RDP products directly in your own laboratory at no cost. Worldwide shipping is fully covered by LANDU. If the sample does not match your formulation requirements, our technical team can further optimize the additive solution based on your application needs.

Your free sample package includes:

FREE Sample Policy for LANDU

Try our Skim Coat & Wall Putty chemical products risk-free! We offer:

If you’re not satisfied with the sample, our Skim Coat & Wall Putty team will refine the product to your exact specification – completely free of charge!

Get Customized Skim Coat & Wall Putty Solutions

Not sure which Skim Coat & Wall Putty Products are right for you? Want pricing information? Our professionals will analyze your specific needs and guide you to the best solution.

We Offer:

Try our Skim Coat & Wall Putty chemical products risk-free! We offer:

With LANDU, you get accurate products, reliable quality, and outstanding service. Simply send us a message, and we’ll take care of everything!

Partner with LANDU - Your Professional Skim Coat & Wall Putty Additives Manufacturer

Expert Formulation Support

Our team helps you optimize your Skim Coat & Wall Putty formula for specific applications. We analyze your current product and suggest improvements. Furthermore, we provide custom blends to meet your unique requirements. As a result, you get a formula that outperforms competitors while meeting your cost targets.

Quality and Innovation Commitment

LANDU holds ISO 9001 and EU REACH certification. Our products are exported to over 60 countries with extensive experience working with multinational corporations.

Large Volume Order Capability

With three major factories and 75,000 tons of annual production capacity, we can quickly deliver large orders of Redispersible Polymer Powder.

FAQs - Skim Coat & Wall Putty Additives

Everything you need to know about LANDU's Skim Coat & Wall Putty Additives production and quality control

1. What additives are used in skim coat and wall putty?

Skim coat and wall putty formulations typically use HPMC or HEMC for water retention, RDP for adhesion and crack resistance, and HPS for improved workability and anti-sag performance. LANDU provides a full range of these additives for dry mix mortar systems.

2. How does HPMC improve wall putty performance?

HPMC improves water retention, extends open time, and enhances application smoothness. This helps reduce surface cracking and improves finishing quality in wall putty applications.

3. What is the role of RDP in skim coat formulations?

RDP improves bonding strength, flexibility, and crack resistance. It is especially important for skim coat systems applied on cement-based or uneven substrates.

4. Can HPS be used in wall putty formulations?

Yes, HPS is commonly used to improve consistency, reduce sagging, and enhance troweling performance in wall putty and skim coat systems.

5. Why does skim coat crack after drying?

Cracking is usually caused by poor water retention, fast drying, or insufficient flexibility in the formulation. Proper use of cellulose ethers and RDP can significantly reduce this issue.

6. What is the difference between skim coat and wall putty?

Skim coat is mainly used for surface leveling and smoothing, while wall putty is typically used as a finishing layer before painting. Both require similar additives but may differ in dosage and performance balance.

7. How to improve workability in wall putty formulations?

Workability can be improved by adjusting HPMC or HEMC dosage and combining it with HPS. These additives help improve troweling feel and reduce application resistance.

8. What is the recommended dosage of additives in skim coat?

Dosage depends on raw materials and local standards, but typically cellulose ether ranges from 0.2%–0.5% and RDP from 1%–5%. LANDU provides technical guidance for formulation optimization.

9. Can skim coat be used in different climates?

Yes, but formulations must be adjusted. In hot climates, water retention and open time become critical, while in humid environments, anti-sag and stability performance are more important.

10. Does LANDU provide technical support for wall putty formulations?

Yes. LANDU supports customers with additive selection and formulation optimization for skim coat and wall putty systems to help achieve stable performance across different applications.