In modern chemical manufacturing and personal care product development, polydimethylsiloxane (PDMS) has become an indispensable raw material due to its exceptional physicochemical stability. To meet the demands of high-viscosity applications, Jiujiang Deepsea Technology has introduced its PDMS-5000 cS methyl silicone oil. Owing to its outstanding chemical inertness, excellent shear stability, and superior thermal stability, this product has become a preferred solution for automotive care, personal care, and industrial manufacturing applications.

I. Core Physicochemical Properties

PDMS-5000 cS is a high-viscosity linear polydimethylsiloxane polymer. It delivers industry-leading performance in viscosity control and chemical purity.

Physical Appearance:
A completely transparent, essentially colorless, odorless, and non-toxic liquid that introduces no undesirable odor or color to finished products.

Thermal Stability:
With an open-cup flash point exceeding 321°C and extremely low volatility, it maintains stable performance even under prolonged high-temperature conditions without significant decomposition or degradation.

Viscosity-Temperature Coefficient:
A viscosity-temperature coefficient of 0.61 indicates minimal viscosity variation across a wide temperature range, providing consistent mechanical damping and lubrication performance.

Surface Energy and Surface Tension:
Its low surface energy and low surface tension provide excellent spreadability, lubricity, and hydrophobic properties.

II. Solving Application Challenges

In practical applications, PDMS-5000 cS is more than a chemical additive-it is an effective solution for addressing a variety of manufacturing and processing challenges.

Excellent Shear Stability and Damping Performance:
PDMS-5000 cS exhibits exceptional resistance to mechanical shear without significant molecular degradation. In shock absorption systems, hydraulic equipment, and other applications requiring high damping performance, it provides excellent cushioning while extending equipment service life.

Enhanced Surface Appearance (Color Enhancement):
In automotive polishing and furniture restoration, this grade significantly improves surface gloss while enhancing color depth, restoring aged surfaces to a rich, like-new appearance.

Superior Protective Barrier:
Its inherent hydrophobicity and chemical inertness enable it to form a breathable protective film on treated surfaces. In skincare formulations, this film allows normal skin transpiration while helping protect against external moisture and environmental irritants.

III. Multi-Sector Applications

Personal Care and Skincare

PDMS-5000 cS is widely used as a key ingredient in protective creams, lotions, and other skincare formulations.

Velvety Skin Feel:
Unlike low-viscosity silicone oils that provide a light, fluid feel, the 5000 cS grade delivers a richer, fuller, velvety-smooth sensory experience. It reduces greasiness while filling microscopic surface irregularities, leaving the skin soft and smooth for an extended period.

Anti-Soaping Performance:
During the application of creams and lotions, emulsifiers often produce undesirable white streaks, commonly known as the "soaping effect." PDMS-5000 cS possesses excellent anti-foaming and anti-soaping properties. Even at low concentrations, it effectively minimizes whitening during application, resulting in smoother spreading, faster absorption, and a cleaner appearance.

Enhanced Skin Protection:
Its high-molecular-weight polymer chains form a semi-breathable, hydrophobic protective film that helps retain moisture while shielding the skin from external irritants.

Automotive and Household Care

As a key ingredient in automotive and household polishing products, PDMS-5000 cS is easy to apply, wipe off, and buff. It produces a durable, high-gloss finish while improving abrasion resistance and protecting painted and metal surfaces from acid rain, ultraviolet radiation, oxidation, and chemical attack.

Industrial Defoaming and Mold Release

In petroleum production, refinery operations, and chemical processing, PDMS-5000 cS serves as an excellent base material for high-performance defoamer formulations.

Non-Aqueous Defoaming:
In non-aqueous systems, effective concentrations typically begin at approximately 10 ppm, with optimal performance generally achieved within the range of 1–100 ppm, depending on the formulation and operating conditions.

Efficient Mold Release:
Its naturally low surface energy makes it an effective mold release agent for plastics and elastomers, enabling easy demolding while producing smooth, defect-free molded surfaces and minimizing adhesion to molds.

IV. Storage and Safety

Although PDMS-5000 cS exhibits very low toxicity, it may cause temporary eye irritation. Appropriate personal protective equipment should be worn during handling.

Storage Conditions:
Store the product in tightly sealed containers in a cool, dry, and well-ventilated area, away from heat sources, sparks, and open flames.

Shelf Life:
The recommended shelf life is 24 months from the date of manufacture when stored under the recommended conditions.