How to Improve Sag Resistance in Waterborne Coatings

How to Improve Sag Resistance in Waterborne Coatings | Proven Anti-Sag Strategies

Discover effective ways to improve sag resistance in waterborne coatings using high-thixotropy rheological additives.

Sag resistance is critical in waterborne coatings, especially for vertical and overhead applications. Insufficient sag control leads to runs, uneven film build, and poor surface appearance.

Improving sag resistance requires increasing yield stress without compromising flow during application. Inorganic rheological additives based on modified bentonite achieve this by forming a strong three-dimensional network in water. This network resists gravity immediately after application while allowing smooth spreading under shear.

By enhancing structural recovery and low-shear viscosity, these additives provide reliable sag resistance across a wide range of coating formulations.

UPS – How to Improve Sag Resistance in Waterborne Coatings

Strong anti-sag performance on vertical surfaces

High thixotropy with smooth application

Immediate structure recovery after shear

Effective at low addition levels

Suitable for architectural and industrial coatings

FAQ – How to Improve Sag Resistance in Waterborne Coatings

What causes sagging in waterborne coatings?
Low yield stress and insufficient structural recovery.

How do inorganic additives improve sag resistance?
They create a physical gel network that resists flow at rest.

Do anti-sag additives affect leveling?
Properly balanced systems maintain good leveling.

Are they suitable for spray application?
Yes, they perform well under high shear.

Can they reduce rework and defects?
Yes, improved sag control leads to cleaner finishes.

Are they compatible with common waterborne binders?
Yes, they work with most aqueous resin systems.

How to Improve Sag Resistance in Waterborne Coatings