Dow DOWSIL 3145 Silicone Adhesive Gray 19 kg Pail - 3145 ADH/SLNT GRAY 19KG

$9,186.40

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Product Number:3145 ADH/SLNT GRAY 19KG

DOWSIL™ 3145 Silicone Adhesive is a one-component, room-temperature-curing silicone adhesive and sealant. It is non-flowing and provides high thermal stability along with high temperature resistance. This material offers high elongation and high tensile strength, making it suitable for a variety of assembly and sealing applications. It is used for assembling printed wire boards, yokes, and for sealing housings, modules, and electrical leads. Packaged in a 19 kg pail, this gray adhesive meets the requirements of MIL-A-46146 and supports demanding electronic and mechanical assembly environments.

Key Features

One-component RTV silicone adhesive
Non-flowing formulation
High thermal stability
High temperature resistance
High elongation
High tensile strength
Meets MIL-A-46146

Applications

Printed wire board assembly
Yoke assembly
Sealing housings
Sealing modules
Sealing electrical leads

Benefits

Provides strong mechanical support
Offers durable sealing capability
Maintains performance under high temperatures
Supports electronic and mechanical assembly needs

Product Specs

Brand: DOWSIL
Color: Gray
Components: 1 part
Cure System: RTV
Cure Time: 48 hours at room temperature
Dielectric Strength: 500 V/mil
Elongation: 670%
Hardness: 51 A
Service Temperature: 50 to 200 °C
Shear Strength: 1,900
Specific Gravity: 1.12 @ 25 °C
Tack Free Time: 78 min
Tensile Strength: 1,035 psi

FAQs

What is DOWSIL 3145 Adhesive?

DOWSIL 3145 is a one-component, room-temperature curing (RTV) silicone adhesive/sealant. It features a non-flowing paste formulation, designed to bond and seal housings, modules, printed wiring boards, and electrical leads without the need for mixing or oven curing.

What key performance properties does it provide?

This adhesive offers high tensile strength (~1,035 psi or 7.1 MPa), excellent elongation (~670 %), and enhanced thermal stability across a wide service temperature range. It cures to a Shore A hardness around 51 and has a specific gravity roughly 1.12 when cured.

What operating temperature range is supported?

For most applications, DOWSIL 3145 can be used from approximately -45 °C to +200 °C (-49 °F to +392 °F) for extended use. At the high end, performance will vary with time and exposure at elevated temperature.

What are the application and installation considerations?

Ensure substrates are thoroughly cleaned and degreased (e.g., with naphtha, mineral spirits) and lightly abraded when feasible. This adhesive doesn’t require mixing — simply dispense and allow to cure in ambient humidity (30–80 % RH). Full properties are typically achieved within 24–72 hours at room temperature.

Are there any limitations or special notes?

Yes — while excellent for many reactive metals, ceramics, glass and some plastics, adhesion may be poor on non-reactive materials like Teflon, polyethylene or polypropylene unless surface treatment or primer is used. Also, the product is not intended for continuous immersion in solvent or fuel environments without testing.

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