Elring® Dirko™ HT Black RTV Silicone Sealant 70ml | STC50550
£9.90 inc. UK VAT
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Description
Elring Dirko™ HT black RTV silicone sealant in a 70ml tube, supplied under Land Rover reference STC50550 and Elring part number 006.553. This neutral-curing, permanently resilient sealant is made for flange joints, covers and housings exposed to engine oil, gearbox oil, coolant and high temperatures. Typical Land Rover uses include sump, rocker cover, oil and water pump, differential, gearbox, thermostat housing and axle-cover sealing where an RTV silicone sealant is specified.
Dirko™ HT black remains flexible after curing and can seal gaps up to 2.0mm. Its normal temperature range is -60°C to +285°C, with resistance up to +315°C for 24 hours. The neutral-curing oxime formulation is also sensor-safe, making it particularly useful around modern engine and driveline components containing sensitive electronics.
Product Details
- Product: Elring Dirko™ HT black silicone sealant
- Land Rover reference: STC50550
- Elring part number: 006.553
- Pack size: 70ml
- Colour: Black
- Type: Single-component, neutral-curing RTV silicone
- Maximum sealing gap: 2.0mm
- Temperature range: -60°C to +285°C, for 24 hours up to +315°C
- Supplied with: Tube key and application nozzle
RTV silicone should only be used on joints intended for this type of sealant. It is not interchangeable with an anaerobic flange sealant or a formed gasket where a different sealing method is specified.
Manufacturer Technical Data
General Product Information
| Property | Data |
|---|---|
| Chemical basis | Oxime silicone |
| Curing | Room temperature vulcanised (RTV) |
| Components | Single component |
| Colour | Black |
| Consistency | Pasty, stable, permanently resilient when cured |
| Temperature range | -60°C to +285°C (for 24h up to +315°C) |
| Maximum sealing gap | 2.0 mm |
| pH value | Neutral |
| Electrical conductivity | Insulating |
| Resistant to | Mineral oils (including additives), synthetic oils, lubricating grease, coolants, UV radiation, cold and hot water, salt water, cleaning agents, weak acids and alkalis |
| Possible applications | Valve cover, oil pan, water and oil pump, differential housing, gearbox, gear oil sump, thermostat housing, control housing, axle cover, flange connection, headlights, rear light and battery compartment |
General Properties
| Measured Variable | Value | Test Standard |
|---|---|---|
| Shore A hardness | 40 ± 5 | DIN 53505 |
| Density (black) | 1.18 ± 0.02 g/ml | DIN 53479 |
| Skin formation time (23°C, 50% relative humidity) | 5 – 10 min | DIN EN ISO 291 |
| Curing time (23°C, 50% relative humidity) | Approx. 4.5 mm / 24 h | DIN EN ISO 291 |
| Elastic modulus 100% | 1.0 ± 0.2 N/mm² | DIN EN ISO 8339 |
| Elongation at break | 400 ± 100 % | DIN 53504 |
| Tensile strength | 3.3 ± 0.2 N/mm² | DIN 53504 |
Media Resistance
| Medium | Property | Temperature | 250 h | 500 h | 1000 h |
|---|---|---|---|---|---|
| Air | Elongation at break (%) | 250°C | -2 | 4 | 31 |
| Air | Tensile strength (N/mm²) | 250°C | 44 | 43 | 32 |
| Air | Elongation at break (%) | 285°C | 50 | 62 | 83 |
| Air | Tensile strength (N/mm²) | 285°C | 1 | -15 | -20 |
| Engine oil | Elongation at break (%) | 120°C | 21 | 33 | 45 |
| Engine oil | Tensile strength (N/mm²) | 120°C | -9 | -15 | -50 |
| Water/glycol (50/50) | Elongation at break (%) | 95°C | 1 | 11 | -12 |
| Water/glycol (50/50) | Tensile strength (N/mm²) | 95°C | 84 | 87 | 69 |
Surface Adhesion
| Surface | Tensile Shear Strength |
|---|---|
| Steel (galvanised) | 0,90 N/mm² |
| Aluminium | 2,00 N/mm² |
| Polyamide 6.6 | 0,60 N/mm² |
Use and Storage
- Sealing surfaces should be clean, dry and free from oil, grease and old sealant before application.
- Recommended processing temperature is +5°C to +35°C.
- Depending on the joint, components can be assembled immediately, after skin formation or after complete curing.
- Elring states that the sealing function is immediate after application and assembly.
- Store in a cool, dry place between +5°C and +25°C.
- The 70ml black tube has a minimum shelf life of 24 months when unopened. Reseal opened tubes securely and use promptly.
For other gasket compounds and workshop sealing products, see our Land Rover sealants.
Additional information
| Weight | 0.2 kg |
|---|---|
| Dimensions | 20 × 5 × 5 cm |
| Brand | Elring |
| Product | Dirko™ HT high-temperature silicone sealant |
| Land Rover Reference | STC50550 |
| EAN/Barcode | 4041248845486 |
| Type | Tube |
| Capacity | 70 ml |
| Material | Silicone |
| Colour | Black |
| Temperature range | -60°C to +315°C |
| Chemical Properties | Permanently elastic, not solvent-bearing, UV-resistant |
| Maximum Sealing Gap | approx. 2 mm |
| Accessories | With applicator |
Brand
Brand
Elring
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Delivery
Twinwoods 4x4 ships Land Rover parts across the UK and around the world. We regularly send parts overseas and use trusted tracked courier services so UK and international customers can order with confidence.
Standard UK shipments are normally sent with DPD. UK orders containing oils or fluids are normally sent with DHL where required, because some carriers restrict liquid shipments.
Worldwide delivery is available through DPD and DHL Express, depending on the destination, parcel size, weight and available courier services. Add the parts you need to your basket, enter your delivery address, and the checkout will show the available delivery options and prices before payment.
Free mainland UK postage and packaging is available on eligible orders over £99, subject to our delivery terms and conditions.
Returns
Up to 60-day returns
Change-of-mind return carriage at your cost
Check fitment before ordering
Extended 60-day returns.
In addition to your statutory rights, eligible products can be returned for up to 60 days from delivery. Our extended returns policy automatically applies to individual products purchased for less than £250 including VAT. Products costing £250 or more may still be accepted for return at our discretion.
Please choose carefully before ordering.
Check part numbers, fitment and suitability before purchase. Please do not order parts simply to try them or on the assumption that they can be fitted and then returned if unsuitable.
- Changed your mind within 14 days? UK and EEA consumers have statutory cancellation rights. Tell us within 14 days of receiving your order, then return the goods within the following 14 days.
- Need longer? Eligible products can be returned under our voluntary extended returns policy. Contact us within 60 days of delivery and, once the return has been agreed, send the goods back within 14 days.
- Extended returns must be unused, unfitted, complete and suitable for resale as new. Goods must be undamaged, unmarked and uncontaminated, with all components and accessories supplied and their original product packaging where this formed part of the supplied product.
- A £10 handling charge applies to extended returns. This is charged once per return consignment, regardless of how many eligible products are returned together. It does not apply where your statutory cancellation rights apply.
- Return carriage and safe packing are your responsibility for change-of-mind returns.
- Managed UK returns: where suitable, we can provide a convenient prepaid tracked return service with straightforward drop-off, proof of handover and tracking linked to your return. The cost will be advised before it is arranged and may be deducted from your refund.
- Please do not fit or attempt to fit a part unless you intend to keep it. Fitting, attempted fitting, contamination, damage or excessive handling can substantially reduce the value of the goods. A product which has been fitted or used will not normally qualify for our voluntary extended returns policy.
- Faulty, damaged or incorrectly described? Contact us first. We will advise the appropriate return method and will normally provide a prepaid return service or cover reasonable agreed return costs.
Returning it yourself?
Please use a tracked, insured return service appropriate to the value and nature of the goods, pack and address the parcel correctly, and retain sufficient evidence to identify and trace the return. You remain responsible for the goods until they reach us.
Returns – quick FAQs
How long do I have to return an item?
Eligible products can be returned for up to 60 days from delivery under our voluntary extended returns policy.
For UK and EEA consumers, statutory change-of-mind cancellation rights also apply: tell us within 14 days of receiving your order, then return the goods within the following 14 days.
For UK and EEA consumers, statutory change-of-mind cancellation rights also apply: tell us within 14 days of receiving your order, then return the goods within the following 14 days.
Which products qualify for 60-day returns?
Our extended returns policy automatically applies to individual products purchased for less than £250 including VAT.
Products purchased for £250 or more are not automatically covered, although we may agree to accept them for return at our discretion. Eligibility is based on the price of each individual product rather than the total order value.
Products purchased for £250 or more are not automatically covered, although we may agree to accept them for return at our discretion. Eligibility is based on the price of each individual product rather than the total order value.
Is there a charge for an extended return?
Returns made under our voluntary extended returns policy are subject to a £10 handling charge per return consignment, regardless of the number of eligible products returned together.
This charge does not apply where the return is being made under your statutory cancellation rights.
This charge does not apply where the return is being made under your statutory cancellation rights.
Who pays return carriage?
For change-of-mind returns, return carriage and safe packing are your responsibility.
Where suitable, we can provide a prepaid tracked return service and advise the cost before it is arranged.
If an item is faulty, damaged or incorrectly described, contact us first. Where return is reasonably required, we will normally provide a prepaid return service or cover reasonable return costs agreed with us.
If an item is faulty, damaged or incorrectly described, contact us first. Where return is reasonably required, we will normally provide a prepaid return service or cover reasonable return costs agreed with us.
What condition must an extended return be in?
Goods returned under our extended returns policy must be unused, unfitted, complete and suitable for resale as new.
They must be undamaged, unmarked and uncontaminated, with all components and accessories supplied and their original product packaging where this formed part of the supplied product.
Can I fit a part and then return it?
Please check fitment and suitability before installation.
Please do not fit or attempt to fit a part unless you intend to keep it.
Once a part has been fitted or an attempt has been made to fit it, it may be marked, contaminated, damaged or otherwise unsuitable for resale as a new part. Fitted or used goods will not normally qualify for our voluntary extended returns policy.
Where statutory cancellation rights apply, handling beyond what is reasonably necessary to inspect the goods may result in a reduction to your refund if it has reduced their value.
Once a part has been fitted or an attempt has been made to fit it, it may be marked, contaminated, damaged or otherwise unsuitable for resale as a new part. Fitted or used goods will not normally qualify for our voluntary extended returns policy.
Where statutory cancellation rights apply, handling beyond what is reasonably necessary to inspect the goods may result in a reduction to your refund if it has reduced their value.
What if the item is faulty?
Contact us before returning it. Where a return is reasonably required for a faulty, damaged or incorrectly described item, we will normally provide a prepaid return service or cover reasonable return costs agreed with us.
Are any items excluded from 60-day returns?
Products purchased for £250 or more including VAT are not automatically covered by our extended returns policy, although we may agree a return at our discretion.
Extended returns must also meet the condition requirements above. Statutory exclusions and any separate statutory rights continue to apply as set out in our full Terms & Conditions.
Extended returns must also meet the condition requirements above. Statutory exclusions and any separate statutory rights continue to apply as set out in our full Terms & Conditions.
How do I start a return?
Contact us
Please include your order number and a brief reason for the return. Do not send anything back until you have received the appropriate return instructions.
Warranty
Buy with confidence: all new parts sold by Twinwoods 4x4 include at least 12 months manufacturer warranty against defects in materials and workmanship under normal use.
Some products and brands may include a longer warranty period where this is provided by the manufacturer. Where applicable, this will normally be stated on the individual product page or covered by the manufacturer’s own warranty terms.
Warranty cover applies to manufacturing defects. It does not cover misuse, incorrect fitting, competition use unless stated, contamination, modification, damage during installation, normal wear and tear, or failure caused by an unrelated vehicle fault. For certain components, proof of professional fitment may be required.
Warranty claims may require the part to be returned for inspection and/or supplier testing before the claim is accepted. Any advance replacement is discretionary.
Warranty remedies relate to the part itself, meaning repair or replacement, or refund if those are not possible. Warranty does not cover labour, removal or refitting, diagnostics, consumables, travel or other incidental costs.
This warranty is in addition to your legal rights and does not reduce those rights.
For full details, please see our Terms and Conditions.
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