[{"values":[{"value":"日本語-Japanese","languageCode":"ja-jp","link":"javascript:void(0);"},{"value":"中文-Chinese Simplified","languageCode":"zh-cn","link":"javascript:void(0);"},{"value":"English","languageCode":"en-us","link":"javascript:void(0);"}],"label":"JP","default":"ja-jp"},{"values":[{"value":"日本語-Japanese","languageCode":"ja-jp","link":"javascript:void(0);"},{"value":"中文-Chinese Simplified","languageCode":"zh-cn","link":"javascript:void(0);"},{"value":"English","languageCode":"en-us","link":"javascript:void(0);"}],"label":"CN","default":"zh-cn"},{"values":[{"value":"日本語-Japanese","languageCode":"ja-jp","link":"javascript:void(0);"},{"value":"中文-Chinese Simplified","languageCode":"zh-cn","link":"javascript:void(0);"},{"value":"English","languageCode":"en-us","link":"javascript:void(0);"}],"label":"US","default":"en-us"}]

DOWSIL™ 401LS Additive

Leveling and Slip Additive for coating and ink applications
Power Up Your Coatings


Dow introduces an innovative family of silicone slip and leveling agents for solventborne, waterborne and radiation curable wood, furniture and plastic coatings, inks and overprint varnishes:

  • DOWSIL™ 205SL Additive
  • DOWSIL™ 204SL Additive
  • DOWSIL™ 401LS Additive

Are you looking to differentiate your formulations by offering systems that provide a pleasing hand feel and improved flow and leveling performance, but can’t find additives that don’t affect recoatability or foam stabilization? Do you have a wide range of resin systems targeting many different applications and are having difficulty finding just the right additive for each system?

Dow's innovative family of slip and leveling agents allows you to identify tailored solutions and fine-tune your solventborne, waterborne and radiation curable coating, ink and OPV formulations for optimum performance on wood, furniture and plastic substrates.

Advantages of Dow™ brand slip and leveling additives

  • Can be used in solventborne, waterborne and radiation cured paints, coatings, inks and overprint varnishes 
  • Effective on wood, furniture and plastic substrates 
  • Lower the coefficient of friction 
  • Highly effective flow and leveling properties 
  • Good recoatability 
  • Effective at low addition levels 
  • Compliant with European legislation for indirect food contact (Swiss Ordinance RS 817.023.21 Annex 6, Part B) 
  • BTX-free 
  • Enable minimization of raw material portfolio 

DOWSIL™ 401LS Additive brings excellent wetting and leveling properties, which can positively impact film appearance. And it achieves these results at use levels as low as 0.075% based on total formulation, further increasing its cost effectiveness. Where some additives impact coating clarity (due to incompatibility) and recoatability, DOWSIL™ 401LS Additive has no impact on these properties.

Figure 1: Dynamic coefficient of friction, leveling and recoatability of a solventborne, 2K PU wood coating containing various Dow additives versus competitor additives. Additives were added at 0.2% by weight in the total formulation.

Graph: Dynamic Coefficient of Friction

Figure 2: Additives tested in a solventborne, two-component polyurethane wood coating at 0.2% by weight, showing that DOWSIL™ 401LS Additive bring best-in-class leveling properties with good recoatability.

Figure 2: Additive test results

Key features of specific slip and leveling additives

  • DOWSIL™ 205SL Additive is a multipurpose silicone additive offering top performance in leveling, slip and hand feel, combined with excellent defoaming properties. 
  • DOWSIL™ 204SL Additive provides excellent slip, superior hand feel, better recoatability and improved clarity with comparable leveling speed, particularly for radiation curable formulations. 
  • DOWSIL™ 401LS Additive provides excellent wetting and leveling in solventborne formulations at use levels as low as 0.075% and without affecting clarity or recoatability. 
  • DOWSIL™ 57 Additive and DOWSIL™ 402LS Additive complete the family of additives. Both are standard Dow Consumer Solutions products for leveling. 

While each individual product has primary properties that deliver key performance benefits in a formulation, the final choice of additive should also depend on its secondary attributes. Together these characteristics will reflect the exact combination of properties required for a given application.

Figure 3: Primary and secondary benefits of DOWSIL™ slip and leveling additives.

Figure 3: Primary and secondary benefits of Dow Consumer Solutions slip and leveling additives.


These values are typical properties and are not intended for use in preparing specifications.

  • Color Colorless to light amber liquid
  • Shelf Life 900 Days
  • Specific Gravity @ 25C 1.03
  • Viscosity 100 to 250 mPa.s

No Safety Data Sheets are available online for this material
Please Contact Dow for additional information.

No sales specification could be found for this material in selected language

DOWSIL™ 401LS Additive
No Technical Data Sheets are available for this product
Please Contact Dow for additional information.

DOWSIL™ 401LS Additive

No Regulatory Data Sheets are available for this product

DOWSIL™ 401LS Additive
Please Contact Dow for distribution options available for this product.