YUNYAN MIX YY-513Y Internal Skim Coat Wall Putty

Premium White Cement-Based Interior Wall Filler & Finishing Compound

Product Overview

YUNYAN MIX YY-513Y (General Purpose) is a professional, high-performance, polymer cement wall putty designed for flawless interior wall preparation. Formulated with premium white cement (10-20%) and high-purity calcium carbonate powder (80-85%), this premium internal skim coat wall putty offers exceptional thixotropy and strong cohesive force with both the base substrate and paint primers.

As a reliable, pre-mixed interior wall filler, YY-513Y guarantees stable quality and an impurity-free application. It smoothly eliminates structural unevenness, filling minor surface imperfections to create a highly durable, crack-resistant, and beautifully uniform wall finishing compound. Once cured, it provides a perfectly smooth, paint ready wall putty surface that reduces topcoat paint consumption and prevents paint peeling.

Key Features & Benefits

Strong Adhesion & Crack Resistance: Specially modified with high-grade non-hazardous polymer ingredients to ensure excellent structural flexibility and a 28-day bonding strength of $\ge 0.7 \text{ MPa}$ under normal conditions.
Pre-mixed for Stable Quality: Ready-to-mix formula eliminates on-site measuring errors, providing consistent open time and effortless workability.
Superior Smooth Finish: Exceptional thixotropy lets installers spray or scrape with minimum effort, achieving a fine, flawless surface texture.
Eco-Friendly & User-Friendly: Passed strict environmental evaluations with zero VOCs (NIL), making it healthy and safe for indoor living environments.
Excellent Paint Compatibility: Serves as the ultimate base coat for various finishing coats, including modern emulsion paints and oil-based paints.

Scope of Application

YUNYAN MIX YY-513Y is highly recommended for interior wall putty applications across residential, commercial, and institutional projects:

Indoor leveling of base mortar coats, renders, and brickworks.
Smoothing and smoothing out pre-cast or cast-in-place concrete bases.
Ideal skim coat putty for apartments, hotels, schools, and offices before final interior decorative painting.

Technical Data Sheet (TDS)

Property / Parameter	Specification / Value
Brand & Model	YUNYAN MIX YY-513Y (General Purpose)
Material Base	Polymer Cement-Based Materials
Form / Color	Fine Powder / White
Mixing Water Ratio (Powder:Water)	100 kg : 40 kg (approx. 10L water per 25kg bag)
Material Consumption (Usage)	1.5 kg / mm / m² (calculated for two-layer application)
Max Thickness per Layer	$\le 1.5 \text{ mm}$
Open Time / Pot Life	15–30 minutes \| 1.0–1.5 hours (@ 25°C)
Setting Time / Initial Dry Time	4 hours \| Passed anti-crack performance
Normal Bonding Strength (YY-513Y)	$\ge 0.7 \text{ MPa}$
Alkali Resistance (48h)	Passed
VOC Content	Passed (NIL / Zero VOC)
Time Before Finish Paint	After 24 – 48 hours

Step-by-Step Installation Guide

1. Subfloor Preparation

The interior wall base must be solid, stable, dry, and free of loose dust, oil, grease, or old paint residues. Ensure the ambient application temperature is between 5°C and 40°C.

2. Mixing

Pour clean water into a mixing bucket, then gradually add the YY-513Y powder at a precise ratio of 100kg powder to 40kg water (or 2.5 parts powder to 1 part water by weight). Stir thoroughly for 3 minutes using an electric mixer until a lump-free, thick-paste consistency is achieved.

3. Application (Scrape or Spray)

Apply the compound using a steel trowel/scraper, or apply via professional spray equipment. Apply in 2 consecutive coats to achieve optimum results, ensuring the thickness of a single layer does not exceed 1.5mm.

4. Sanding & Painting

Allow the putty to set for at least 4 hours. Once fully cured and dry (typically 24 to 48 hours depending on humidity), lightly sand the surface before applying your choice of emulsion or oil-based finish paint.

How to apply internal skim coat wall putty on interior walls

Global B2B Sourcing & Supply Chain Capabilities

As a world-class wall putty supplier based in Guangdong, China, YUNYAN MIX provides an efficient, integrated sourcing experience for global building material distributors and project contractors:

Massive Production & Supply Ability: Up to 100,000 kgs per day, ensuring steady supply chains for mega-scale construction projects.
Fast Logistics Delivery: Standard international lead time of 15–20 days from order confirmation.
Flexible Packaging & MOQ: Standard 25kg moisture-proof bag packaging. Minimum Order Quantity (MOQ) is 500 bags.
Flexible Payment Terms: 50% deposit via bank transfer, with the balance cleared prior to container loading.
One-Stop Solution: Full package customization, export documentation, and technical support services available