Loctite SI 5910 Black Silicone Sealant | Wisdo Merchants
Technical Specifications
| Property | Value |
|---|---|
| Brand | Loctite (Henkel) |
| Product | SI 5910 |
| Type | One-part silicone, form-in-place gasket |
| Cure | Moisture cure at room temperature |
| Strength | Low (easy to dismantle) |
| Colour | Black |
| Maximum gap | 1 mm |
| Cure-through depth | 2.75 mm in 24 hours |
| Tack-free time | about 40 minutes |
| Operating temperature | –55 °C to +200 °C |
Description
Loctite SI 5910 Silicone Sealant for Flexible Flanges and Covers
Pressed-steel covers flex, vibrate and expand with heat. Cut gaskets on these parts often crack or squeeze out, and the joint soon starts weeping oil. Loctite SI 5910 silicone sealant solves this by forming a flexible gasket that moves with the joint. At Wisdo Merchants, we supply it to mechanics, maintenance technicians and workshops across Nairobi and Kenya.
Loctite SI 5910 is a black, one-part, form-in-place gasket made by Henkel from silicone rubber. It cures by reacting with moisture in the air, turning from a paste into a tough, rubbery gasket. As a result, it seals flanges that move or have larger gaps, where rigid sealants would crack.
Features and Benefits of Loctite SI 5910 Silicone Sealant
- Made for flexible flanges. It suits stamped sheet metal covers and other flanges that flex or move in service.
- Excellent oil resistance. It keeps sealing against engine oil, gear oil and other lubricants.
- Fills large gaps. It seals gaps up to 1 mm and cures through up to 2.75 mm thick in 24 hours.
- Wide temperature range. It works from –55 °C up to +200 °C.
- Non-slump paste. Its thixotropic texture stays where you put it, even on vertical faces.
For workshops, this means fewer oil leaks and no need to stock dozens of cut gaskets. Meanwhile, covers stay sealed through heat, vibration and movement.
Technical Specifications
| Property | Value |
|---|---|
| Brand | Loctite (Henkel) |
| Product | SI 5910 |
| Type | One-part silicone, form-in-place gasket |
| Cure | Moisture cure at room temperature |
| Strength | Low (easy to dismantle) |
| Colour | Black |
| Maximum gap | 1 mm |
| Cure-through depth | 2.75 mm in 24 hours |
| Tack-free time | about 40 minutes |
| Operating temperature | –55 °C to +200 °C |
| Suitable materials | Metal, plastic, glass, ceramic |
Applications of Loctite SI 5910 Silicone Sealant and How to Use It
- Oil sump pans and timing covers on engines
- Pressed-steel gearbox and differential covers
- Pump and compressor covers with flexible flanges
- Inspection plates and access covers on machinery
- Plastic and metal housings that need an oil-resistant seal
Sealing an Oil Sump
Picture a mechanic refitting the oil sump on a generator engine. First, they scrape off the old gasket and degrease both flanges. Next, they run a continuous bead of Loctite SI 5910 around the sump flange, circling each bolt hole. After that, they fit the sump within a few minutes and tighten the bolts evenly. Finally, they allow the silicone to cure before filling the engine with oil.
Silicone or Anaerobic Sealant?
Choose Loctite SI 5910 for flexible, pressed-steel or plastic covers and for larger gaps. In contrast, for rigid, machined metal flanges with tight gaps, our red anaerobic flange sealant is the better choice.
Safety and Handling
- Ventilate the work area. Uncured silicone releases vapour as it cures.
- Avoid skin and eye contact. Wear gloves and safety glasses, and wipe off any spills promptly.
- Read the Safety Data Sheet. Follow Henkel’s handling and first-aid guidance.
- Assemble promptly. Fit parts before the surface skins over, so the gasket bonds to both flanges.
- Store properly. Keep the tube or cartridge closed, in a cool, dry place.
Frequently Asked Questions
How long before I can add oil?
The surface becomes tack-free in about 40 minutes. However, allow it to cure longer, ideally up to 24 hours, before filling and running the equipment.
Can it replace a cut gasket?
Yes, on flanges with gaps up to 1 mm. It is especially suited to flexible, pressed-steel covers.
Is it easy to remove later?
Yes. It is low strength, so covers come apart easily. Simply scrape off the old silicone before resealing.
Does it work on plastic covers?
Yes. It seals metal and plastic flanges, as well as glass and ceramic parts.
Do you deliver outside Nairobi?
We offer same-day delivery once your order is confirmed, subject to stock availability. Call or email our sales team to confirm stock and arrange delivery to your site.
Order Loctite SI 5910 from Wisdo Merchants
Leak-free covers start with a sealant that moves with the joint. Our Loctite SI 5910 silicone sealant forms a tough, oil-resistant gasket on flexible flanges. Furthermore, you can browse our full product range for your other maintenance needs.
Visit us: Dar es Salaam Road, Off Enterprise Road, Industrial Area, Nairobi
Call: +254 795 938305
Email: sales@wisdomerchants.com
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