The material selection platform
Coatings Ingredients
The material selection platform
Coatings Ingredients
by SpecialChem
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DOWSIL™ 904H Coating Additive

Technical Datasheet | Supplied by Dow
DOWSIL™ 904H Coating Additive by Dow is a BTX-free functional polydimethylsiloxane. Acts as a water repellent and hydrophobing agent. Provides improved water beading and snail trail resistance in high PVC, dark colored paints. Used in architectural facade coatings. Complies with EU DIRECTIVE 2010/75/EU. Recommended usage level of DOWSIL™ 904H Coating Additive ranges from 2.5-5%. It has a shelf life of 700 days at <50°C.
DOWSIL™ 904H Coating Additive
Technical Datasheet | Supplied by Dow
Product Type
  • Hydrophobing Agents
  • Water Repellents > Silicones
Chemical Composition
CAS Number
Physical Form
Colorless to amber
Product Launch Date
Dec 1, 2017
Product Status
Applications/ Recommended for
  • Coatings
  • Resins > Vinyls
  • Coatings Markets > Architectural / Decorative > Facade paints (plaster, concrete)
Labels/Agency Rating

DOWSIL™ 904H Coating Additive Properties


Value & Unit
Test Condition
Test Method
Viscosity, CTM 0050
70 cP
Volatile Organic Compounds (VOC)
19 g/l

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