Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Dow SYL-OFF 4000 Catalyst

Dow SYL-OFF 4000 Catalyst is a platinum-based addition-cure silicone catalyst from Dow’s SYL-OFF release agent portfolio, enabling rapid, low-temperature curing of silicone coatings on diverse substrates while ensuring excellent release performance and shelf stability.
  • dow syl off 4000 catalyst_d634e7eb
  • dow syl off 4000 catalyst_d634e7eb

Features Of Dow SYL-OFF 4000 Catalyst

  1. Platinum-based liquid catalyst optimized for efficient hydrosilylation reactions.

  2. Excellent thermal stability enabling consistent performance in high-temperature processing.

  3. Low volatility formulation minimizes catalyst loss during curing and handling.

  4. High selectivity with minimal side reactions, supporting clean silicone network formation.

  5. Compatible with a broad range of vinyl-functional and Si–H-containing silicones.

Typical Applications Of Dow SYL-OFF 4000 Catalyst

  1. Room-temperature vulcanizing (RTV) silicone sealants and adhesives.

  2. Heat-cured liquid silicone rubber (LSR) for medical and automotive components.

  3. Encapsulants and potting compounds for electronics protection.

  4. Release coatings for silicone-treated papers and films.

  5. Functionalized silicone emulsions and surface modifiers.

Specifications Of Dow SYL-OFF 4000 Catalyst

Chemical TypePlatinum complex in isopropanol solution
Product FormClear, low-viscosity liquid
AppearanceColorless to pale yellow liquid
Platinum ContentApprox. 1,000 ppm (as Pt)
Density (25 °C)~0.79 g/cm³
Flash Point (Tag Closed Cup)~12 °C
Storage Temperature2–8 °C recommended; protect from light and moisture
Primary ApplicationsHydrosilylation catalysis in silicone elastomers, gels, and coatings


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