DOWSIL 236
Harmonization Code : 3404.90.00.00 | Artificial waxes and prepared waxes : Other
Main features
- Durable, Dry-Surfaced Silicone Rubber Coating
- Sticky-Material Adhesion Prevention
- Multiple Application Methods
Product Description
DOWSIL™ 236 Dispersion Coating is a one-part silicone rubber dispersion designed to form a dry-surfaced, durable release and protective coating. Supplied as a low-viscosity white liquid, it cures at room temperature through reaction with atmospheric moisture to produce a tough, rubbery electrical-insulating layer. The coating can help prevent sticky materials from adhering to processing equipment, reduce buildup and cleanup, and protect surfaces from weathering and corrosion. It may be applied by spraying, brushing, dipping, roller coating, or stamp coating.
Key features
- Durable silicone rubber coating: Cures from a low-viscosity liquid to a smooth, white, dry-surfaced rubber layer.
- Release and surface protection: Helps release sticky materials, reduce process buildup, and protect surfaces from weathering and corrosion.
- Room-temperature moisture cure: Oxime-cure formulation reacts with moisture vapor in the air without requiring high-temperature processing.
- Flexible application options: Can be applied by spraying, brushing, dipping, roller coating, or stamp coating.
- On-site application and repair: Can be applied or repaired without disassembling supported equipment.
Applications / Suitable for
- Release coatings for rolls, conveyors, dryer flights, and molding operations
- Protection of surfaces from weathering, corrosion, dirt, and sticky materials
- Linings for plastic containers or vessels
- Latex manufacturing, paint-spraying, and waste-handling equipment
- Urethane and polyester molding operations
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Color
white
The color
Solids
70 %
Specific Gravity
1.64
Specific gravity (SG) is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume.
For liquids, the reference substance is almost always water (1), while for gases, it is air (1.18) at room temperature. Specific gravity is unitless.
Thermal Properties
Flash Point
10-12 °C
The flashpoint of a solvent is the lowest possible temperature at which it can vaporize to form an ignitable vapor.
Flashpoint is often confused with “autoignition temperature”, which is the temperature at which a solvent ignites without an ignition source.
Operating Temperature
-40 to 150 °C
Physical Properties
Tack-Free Time
120 minutes
Viscosity
675 mPa.s
Viscosity is a measurement of a fluid’s resistance to flow.
Viscosity is commonly measured in centiPoise (cP). One cP is defined as
the viscosity of water and all other viscosities are derived from this base. MPa is another common unit with a 1:1 conversion to cP.
A product like honey would have a much higher viscosity -around 10,000 cPs-
compared to water. As a result, honey would flow much slower out of a tipped glass than
water would.
The viscosity of a material can be decreased with an increase in temperature in
order to better suit an application
Mechanical Properties
Elongation
500 %
Elongation is the process of lengthening something.
It is a percentage that measures the initial, unstressed, length compared to the length of the material right before it breaks.
It is commonly referred to as Ultimate Elongation or Tensile Elongation at break.
Additional Information
Technical properties
As-supplied / before-processing properties
Typical as-supplied and processing properties. Values are not intended for use in preparing specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Composition | Solvent dispersion of one-part silicone rubber | — | As supplied |
| Color | White | — | CTM 0176 |
| Flash point | 50–53 (10–12) | °F (°C) | CTM 0021A |
| Solids | 70 | % | CTM 0010 |
| Viscosity | 675 | centipoise | CTM 0050; at 77°F (25°C) |
| Vehicle | VM&P naphtha | — | As supplied |
| Tack-free drying time | 2 | hours | CTM 0095; cured at 72°F (22°C) and 50% relative humidity |
| Skin-over time | 85 | minutes | At 72°F (22°C) and 50% relative humidity |
| Cure time | 24 | hours | 0.100-inch section at 72°F (22°C) and 50% relative humidity |
| Recommended dry-film thickness per application | 4–18 | mils | Additional coats may be used; allow 2–4 hours of drying between layers at room temperature in a humid atmosphere |
| Shelf life | 12 | months | From date of manufacture; store below 90°F (32°C) in a closed container |
Technical properties
After-processing / final-state properties
Typical cured-material properties. Values are not intended for use in preparing specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Tensile strength | 325 | psi | CTM 0137A; cured material |
| Elongation | 500 | % | CTM 0137A; cured material |
| Durometer | 20 | Shore A points | CTM 0099; cured material |
| Specific gravity | 1.64 | — | CTM 0022; at 77°F (25°C) |
| Approximate service temperature | −40 to 300 (−40 to 150) | °F (°C) | Approximate service-temperature range |
