Kehao Chemicals
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Performance Priorities

Target performance for this application

Explore the functional requirements that guide material selection, product matching, and application testing.

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Water Retention

Controls water loss to absorbent substrates, maintains sufficient moisture for gypsum hydration, and reduces premature drying, cracking, and adhesion loss.

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Opening Time

Keeps the mixed gypsum putty workable for a suitable period, allowing sufficient time for spreading, leveling, adjustment, and finishing.

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Setting Time

Provides predictable setting behavior, helping installers complete application efficiently and maintaining consistent performance under different construction conditions.

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Workability

Provides a smooth and creamy consistency, making the gypsum putty easier to mix, spread, level, and finish with less application effort.

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Rheology

Balances viscosity and flow behavior to provide easy troweling, stable application thickness, and good surface leveling.

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Sag Resistance

Keeps the wet putty stable on vertical surfaces, preventing downward movement and helping maintain a uniform application thickness.

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Adhesion Strength

Improves bonding to gypsum board, concrete, plaster, and masonry substrates, reducing hollowing, peeling, and delamination.

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Crack Resistance

Reduces drying and shrinkage stress, helping prevent fine cracks caused by rapid water loss, excessive thickness, or minor substrate movement.

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Moisture Resistance

Helps reduce softening, swelling, staining, and adhesion loss when the finished putty is exposed to moderate humidity or temporary moisture.

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Surface Strength

Produces a firm and cohesive dried surface that resists powdering, abrasion, and damage during sanding and subsequent painting.

Problem Solving

Common application challenges

Open each topic to understand common issues and the considerations behind a more stable application result.

Poor Water Retention

The gypsum putty loses water too quickly after application, especially on absorbent substrates, resulting in difficult finishing, insufficient hydration, reduced adhesion, and surface defects.

Short Open Time

The mixed putty thickens or begins to set too quickly, leaving insufficient time for spreading, leveling, adjustment, and surface finishing.

Unstable Setting Time

The setting time varies noticeably between production batches or under different temperature and water conditions, making construction scheduling and quality control difficult.

Poor Workability

The mixed gypsum putty feels dry, sticky, heavy, or difficult to spread, requiring excessive effort and making it difficult to achieve a uniform layer.

Sagging

The wet putty slides downward after application on vertical surfaces, causing uneven thickness, surface waves, and additional finishing work.

Low Adhesion

The putty does not bond firmly to plasterboard, concrete, plaster, or masonry substrates, resulting in hollow areas, peeling, flaking, or localized detachment.

Surface Cracking

Fine or visible cracks develop during drying or after application because of rapid water loss, excessive thickness, shrinkage, or minor substrate movement.

Surface Powdering

The dried surface releases loose powder when touched, rubbed, or sanded, indicating insufficient surface strength and affecting subsequent painting.

Lumping During Mixing

The powder forms lumps or fish-eyes when mixed with water, resulting in incomplete dispersion, uneven consistency, and increased mixing time.

Pinholes and Air Bubbles

Small holes, bubbles, or surface voids appear during application or drying, affecting smoothness and becoming more visible after painting.

Moisture Sensitivity

The dried gypsum putty softens, swells, stains, or loses adhesion after exposure to moisture or high humidity.

Application-Focused Support

Need help matching the right product?

Use the recommended Product pages as your starting point for key performance and technical information, then evaluate the best fit for your formulation and application goals.

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