Shin-Etsu KE-44W Flowable Oxime Silicone Adhesive Sealant
Shin-Etsu's KE-44W Flowable Oxime Adhesive is a single-component, room-temperature vulcanizing (RTV) silicone that cures at ambient temperature to form a tough, durable elastomer. Its neutral oxime cure chemistry means no acetic acid off-gassing — making it safe for use on sensitive metals, electronics, and coated surfaces. Low odor, non-corrosive, and primer-free adhesion to a wide range of substrates make this a go-to sealant for maintenance, repair, and assembly applications in the field and shop.
Key Features
- Single-component, room-temperature cure — no mixing required
- Neutral oxime cure — non-corrosive, low odor, no acetic acid
- No primer required for adhesion to most substrates
- Bonds to metals, plastics, glass, and ceramics
- Cures to a tough, flexible, durable silicone elastomer
- Flowable consistency — self-levels into gaps and seams
- Excellent resistance to temperature extremes, moisture, and UV
Specifications
| Spec | Value |
|---|---|
| Cure Type | Oxime (neutral cure), RTV |
| Components | Single-component |
| Consistency | Flowable |
| Substrates | Metals, plastics, glass, ceramics |
| Primer Required | No |
| Odor | Low odor |
| Vendor | Shin-Etsu |
| SKU | OHL-KE44W |
Frequently Asked Questions
What is oxime cure silicone?
Oxime cure silicones release oxime as a byproduct during curing rather than acetic acid (as acetoxy/vinegar-cure silicones do). This makes them non-corrosive and safe for use on metals, electronics, and sensitive coatings where acetic acid could cause damage or corrosion.
What does "flowable" mean for an adhesive?
A flowable adhesive has a low viscosity that allows it to self-level and penetrate into tight gaps, seams, and irregular surfaces. This makes it ideal for sealing joints, encapsulating components, or bonding surfaces where a paste-type adhesive would not fully fill the void.
Does this adhesive require a primer?
No. The Shin-Etsu KE-44W bonds directly to metals, plastics, glass, and ceramics without the need for a primer, simplifying application in field and maintenance settings.
Is this silicone safe to use on electrical or electronic components?
Yes. Because it uses a neutral oxime cure (not corrosive acetoxy cure), the KE-44W is suitable for use near sensitive metals and electronic components where off-gassing acids could cause damage.
What are common applications for this adhesive in arborist or utility work?
This sealant is well-suited for sealing equipment housings, bonding rubber or plastic components, weatherproofing electrical connections, and general maintenance repairs on metal and composite surfaces encountered in arborist and utility field work.
What is the cure mechanism — how long does it take to cure?
The KE-44W cures at room temperature through moisture in the air (RTV). Skin-over time and full cure time will vary based on temperature, humidity, and bond line thickness — refer to the Shin-Etsu technical data sheet for specific cure schedules.