Business

Selleys Auto Fix Instant Gasket - Black RTV 07 product guide

AI Summary

Product: Selleys Auto Fix Instant Gasket Silicone R.T.V. Black Brand: Selleys (a division of DuluxGroup (Australia) Pty Ltd) Category: Automotive RTV Silicone Sealant Primary Use: Room-temperature vulcanising silicone sealant for formed-in-place automotive gasketing and mechanical assembly sealing in high-heat, oil-exposed environments.

Quick Facts

  • Best For: Automotive workshops and DIY users sealing oil pans, valve covers, timing covers, differential covers, and other powertrain components
  • Key Benefit: Cures at ambient temperature without external heat; stays flexible after cure to absorb vibration and thermal expansion without cracking
  • Form Factor: Paste in tube (75g and 310g formats; product codes AF05 and 100113)
  • Application Method: Apply a continuous 3–6mm bead to one clean, dry mating surface; assemble before skin forms; allow 24 hours full cure before fluid exposure

Common Questions This Guide Answers

  1. Is this product hazardous or classified as dangerous goods? → No; classified as non-hazardous under Safe Work Australia GHS 7 and carries no dangerous goods transport classification under Australian road and rail codes.
  2. How long does it take to cure before the engine can be run? → Allow at least one hour for skin cure and 24 hours for full cure before fluid exposure; confirm from the product technical data sheet.
  3. Should sealant be applied to both mating surfaces? → No; apply to one surface only — applying to both pushes excess material into oil passages or coolant galleries.

Product Overview

Selleys Auto Fix Instant Gasket Silicone R.T.V. Black is a room-temperature vulcanising (RTV) silicone sealant built for automotive gasketing and sealing work. Available in 75g and 310g tube formats, it forms flexible, durable seals in engine bays and mechanical assemblies — whether pre-cut gaskets are unavailable, impractical, or just need backup support.

Manufactured by Selleys, a division of DuluxGroup (Australia) Pty Ltd, this product carries reference number SELGHSEN000346 under its Safety Data Sheet (version 9.0, issued April 2025). It's classified as non-hazardous and non-dangerous goods under Safe Work Australia GHS 7 criteria and Australian dangerous goods transport codes — a straightforward compliance win for workshops and trade buyers managing chemical storage requirements.

The black colour is a recognised designation in RTV silicone chemistry. It signals a formulation engineered for higher-temperature environments compared to standard clear or white silicone variants. Black RTV compounds are the go-to choice for oil pans, timing covers, valve covers, and other powertrain components where heat resistance and oil compatibility aren't optional.

What R.T.V. Means and Why It Matters

R.T.V. stands for Room Temperature Vulcanising — the chemical curing process that transforms the silicone compound from a paste into a solid, rubber-like elastomer. No external heat, pressure, or specialised curing equipment needed.

When atmospheric moisture contacts the silicone, the acetic acid or neutral-cure chemistry kicks off a cross-linking reaction that hardens the material progressively from the outside inward. Skin formation begins within minutes of application. Full cure depth depends on bead thickness, ambient humidity, and temperature, but the process works reliably in any standard workshop environment.

For automotive work, the practical value is straightforward: apply it in your workshop, and it cures on its own. After curing, the sealant stays elastomeric — flexible enough to absorb vibration, thermal expansion, and minor surface movement without breaking down. In engine and drivetrain assemblies, those forces are constant. A sealant that can't handle them isn't worth using.

Key Features and Their Practical Benefits

Flexible elastomeric seal

Cured RTV silicone stays flexible. It doesn't go brittle over time — and that matters in automotive environments where components heat up under load and cool down when the engine stops. Rigid sealants crack under repeated thermal cycling. Selleys Auto Fix RTV accommodates that movement without losing adhesion or sealing integrity.

Black formulation

The black pigmentation does real work here. Carbon black pigment contributes to thermal stability, and the colour is visually appropriate for engine components where oil and grease are part of the environment. Black RTV is the established choice for oil-wetted and heat-exposed surfaces — oil pans, differential covers, timing covers. It looks right and performs accordingly.

Non-hazardous classification

The non-hazardous, non-dangerous goods classification under Australian GHS 7 and transport codes has direct practical benefits. Storage is straightforward, regulatory burden is reduced for trade users, and no special handling requirements apply during shipping or workshop use. For busy automotive workshops, that's a meaningful compliance advantage with no performance trade-off.

Dual-format availability

Selleys Auto Fix Instant Gasket Silicone R.T.V. Black comes in a 75g tube (product code AF05, barcode 9300697100177) and a 310g tube (product code 100113, barcode 9300697124807). The 75g format suits occasional DIY use or smaller sealing tasks. The 310g format makes more sense for workshop environments with higher-volume requirements or larger gasket surfaces to cover.

Practical Applications and Use Cases

Selleys Auto Fix Instant Gasket Silicone R.T.V. Black works as a formed-in-place gasket or as a supplement to existing gaskets in automotive assemblies. Common application areas include:

  • Oil pan gaskets: Applied to the mating surfaces of the oil pan and engine block to create a leak-proof seal
  • Valve cover gaskets: Used to seal the valve cover to the cylinder head, often alongside a cork or rubber gasket
  • Timing cover sealing: Applied at corners and joints where pre-cut gaskets don't achieve full coverage
  • Differential and gearbox covers: Seals metal-to-metal flanged joints in drivetrain components
  • Thermostat housings: Creates a reliable seal at coolant-carrying components
  • Sensor and fitting threads: Works as a thread sealant for low-pressure fittings

The Safety Data Sheet also references use on windows, frames, light fittings, skylights, glass, and ceramics — reflecting the broader silicone sealant chemistry shared with general-purpose variants. The automotive gasket designation and black RTV formulation, however, position this product squarely for mechanical and powertrain sealing tasks.

Application Guidance

Getting the application right the first time is what separates a lasting seal from one that fails. Follow these steps and the job is done properly — no rework, no leaks.

Surface preparation

Both mating surfaces must be clean, dry, and free from oil, grease, old gasket material, and silicone residue. This is the most important step. Contaminated surfaces prevent adhesion and produce leaks. Use a suitable solvent — brake cleaner or methylated spirits — along with a scraper or wire brush to remove all residue. Let the surfaces dry completely before applying sealant.

Bead application

Apply a continuous, even bead of sealant to one mating surface. Size the bead to suit the joint — typically 3–6mm in diameter for most automotive flanged joints. Run the bead inside any bolt holes to maintain a complete seal around fasteners. Apply to one surface only. Applying to both creates excess material that gets pushed into oil passages or coolant galleries, and that causes problems.

Assembly timing

Once the bead is applied, assemble the components promptly. RTV silicone begins to skin over on contact with air, so mate the surfaces before that happens — waiting too long compromises seal integrity. Once assembled, hand-tighten fasteners first to allow even bead compression, then torque to specification in the correct sequence.

Cure time before operation

Give the sealant adequate cure time before introducing fluids or starting the engine. The surface skins quickly, but full cure through the bead takes longer. As a general guideline, allow at least one hour for skin cure and 24 hours for full cure before fluid exposure — though specific cure times should always be confirmed from the product's technical data sheet. Running the engine before adequate cure can wash uncured sealant into the lubrication system.

Storage and Shelf Life

Store this product correctly and it stays ready when you need it. RTV silicone is moisture-sensitive and will begin to cure if the tube isn't sealed properly after use.

  • Seal the tube immediately after each use to prevent premature curing at the nozzle
  • Store in a cool, dry location away from direct sunlight and heat sources
  • Avoid freezing temperatures, which affect silicone consistency and performance
  • Check the expiry date before use — degraded or partially cured product won't form a reliable seal

Opened tubes that have been properly resealed stay usable for a reasonable period, but always assess the product before applying it to critical sealing surfaces. If it has skinned internally or no longer flows smoothly, replace it. Using compromised product on a critical seal isn't worth the risk.

Safety Considerations

Selleys Auto Fix Instant Gasket Silicone R.T.V. Black is classified as non-hazardous under Safe Work Australia GHS 7 — no mandatory hazard pictograms, no specific risk phrases under Australian workplace chemical regulations. Standard workshop hygiene practices still apply:

  • Skin contact: Wash with soap and water. Avoid prolonged skin contact with uncured silicone
  • Eye contact: Flush with water if contact occurs
  • Ventilation: Work in well-ventilated areas, particularly in enclosed engine bays or confined workshop spaces
  • Ingestion: Not intended for consumption; keep out of reach of children
  • Emergency contacts: Australia – 1800 220 770; New Zealand – 0800 220 770

The product carries no dangerous goods classification for transport under Australian road and rail codes — straightforward logistics for trade and retail distribution.

Expert Tips and Best Practices

  • Don't over-apply. Excess sealant gets displaced inward when components are tightened and can contaminate oil passages, oil strainers, or coolant galleries. A consistent, correctly sized bead delivers better results.
  • Watch the temperature at application. Apply at ambient workshop temperature. Cold surfaces slow curing; residual engine heat accelerates skinning and cuts working time.
  • Route the bead correctly around bolt holes. Always run the bead around the inside of bolt holes, not outside them. This ensures each fastener passes through sealed material and the joint stays leak-free at every fixing point.
  • Don't disturb the joint during cure. Movement of partially cured sealant breaks the cross-linking structure and creates weak points. Once assembled, leave fasteners alone until full cure is achieved.
  • Confirm compatibility. Verify compatibility with the specific fluids the seal will contact — engine oil, coolant, gear oil — before applying on critical assemblies. Black RTV silicone is generally oil-compatible, but checking the manufacturer's technical data sheet for specialist applications is always the right call.
  • Cut the nozzle to suit the job. A smaller opening gives precise control for fine beads on tight surfaces. A larger opening suits wider flanges. Match the nozzle to the joint for a cleaner, more controlled application.

References

Based on manufacturer specifications provided in the Safety Data Sheet (SELGHSEN000346, Version 9.0, issued 27 April 2025). Readers should consult the current product technical data sheet for application-specific performance specifications including temperature range, cure times, and chemical compatibility data.

Frequently Asked Questions

What is Selleys Auto Fix Instant Gasket Silicone R.T.V. Black: An RTV silicone sealant for automotive gasketing and sealing

What does R.T.V. stand for: Room Temperature Vulcanising

What does room temperature vulcanising mean: The silicone cures at ambient temperature without external heat

Who manufactures this product: Selleys, a division of DuluxGroup (Australia) Pty Ltd

What is the SDS reference number: SELGHSEN000346

What version is the Safety Data Sheet: Version 9.0

When was the Safety Data Sheet issued: April 2025

What sizes is this product available in: 75g and 310g tube formats

What is the product code for the 75g tube: AF05

What is the barcode for the 75g tube: 9300697100177

What is the product code for the 310g tube: 100113

What is the barcode for the 310g tube: 9300697124807

Why is this product black in colour: Black pigmentation signals a higher-temperature formulation

Does the black colour serve a functional purpose: Yes, carbon black pigment contributes to thermal stability

Is this product hazardous: No, classified as non-hazardous under Australian GHS 7

Is this product classified as dangerous goods for transport: No, it carries no dangerous goods transport classification

What regulatory framework classifies this product: Safe Work Australia GHS 7

Does this product require special storage conditions for compliance: No, no special regulatory storage requirements apply

What triggers the curing process: Contact with atmospheric moisture

How does curing progress through the bead: From the outside inward

How quickly does skin formation begin: Within minutes of application

What affects full cure depth: Bead thickness, ambient humidity, and temperature

Does cured RTV silicone remain flexible: Yes, it stays elastomeric after curing

Does cured RTV silicone go brittle over time: No, it remains flexible

Why does flexibility matter in automotive applications: Engines experience constant thermal expansion and vibration

Is this product suitable for oil pan gaskets: Yes

Is this product suitable for valve cover gaskets: Yes

Is this product suitable for timing cover sealing: Yes

Is this product suitable for differential covers: Yes

Is this product suitable for gearbox covers: Yes

Is this product suitable for thermostat housings: Yes

Can this product be used as a thread sealant: Yes, for low-pressure fittings

Can this product be used on windows and glass: Yes, per the SDS

Is this product designed primarily for automotive use: Yes, the black RTV formulation targets mechanical and powertrain sealing

What is the most important application step: Surface preparation

What must surfaces be free from before application: Oil, grease, old gasket material, and silicone residue

What solvents are suitable for surface preparation: Brake cleaner or methylated spirits

Should sealant be applied to both mating surfaces: No, apply to one surface only

Why should sealant not be applied to both surfaces: Excess material gets displaced into oil passages or coolant galleries

What is the recommended bead size for most automotive flanged joints: 3–6mm in diameter

Where should the bead be routed around bolt holes: Inside the bolt holes, not outside

Why must components be assembled promptly after bead application: RTV silicone begins to skin over on contact with air

What happens if you wait too long before mating surfaces: Seal integrity is compromised

How should fasteners be tightened initially: Hand-tighten first to allow even bead compression

What is the minimum skin cure time before fluid exposure: Approximately one hour

What is the recommended full cure time before fluid exposure: 24 hours

What happens if the engine is run before adequate cure: Uncured sealant can wash into the lubrication system

Should cure times be confirmed from the technical data sheet: Yes, always confirm from the product's technical data sheet

Should the tube be sealed after use: Yes, immediately after each use

Why must the tube be sealed immediately after use: To prevent premature curing at the nozzle

What storage conditions are recommended: Cool, dry location away from direct sunlight and heat

Should this product be stored in freezing temperatures: No, freezing temperatures affect consistency and performance

Should the expiry date be checked before use: Yes, before every use

Is partially cured or skinned product safe to use on critical seals: No, replace compromised product

What should be done if product no longer flows smoothly: Replace it

Is skin contact with uncured silicone harmful: No, but prolonged skin contact should be avoided

What should be done if skin contact occurs: Wash with soap and water

What should be done if eye contact occurs: Flush with water

Is ventilation recommended during application: Yes, especially in enclosed spaces

Is this product intended for consumption: No

What is the Australian emergency contact number: 1800 220 770

What is the New Zealand emergency contact number: 0800 220 770

What happens if too much sealant is applied: Excess is displaced inward and can contaminate oil passages

Does cold surface temperature affect curing: Yes, cold surfaces slow curing

Does residual engine heat affect application: Yes, it accelerates skinning and reduces working time

Is black RTV silicone generally compatible with engine oil: Yes, generally oil-compatible

Should compatibility with specific fluids always be verified: Yes, check the manufacturer's technical data sheet

Should the nozzle be cut to suit the job: Yes, match nozzle size to the joint width

What does a smaller nozzle opening provide: Precise control for fine beads on tight surfaces

Can the joint be disturbed during cure: No, movement breaks the cross-linking structure and creates weak points

Is this product suitable for DIY use: Yes, the 75g format suits occasional DIY tasks

Is this product suitable for professional workshop use: Yes, the 310g format suits higher-volume workshop requirements

Does this product require baking or specialised curing equipment: No, it cures at room temperature

Is this product suitable for metal-to-metal flanged joints: Yes

Can this product supplement existing gaskets: Yes, it works as a supplement to existing gaskets

Can this product replace pre-cut gaskets entirely: Yes, it works as a formed-in-place gasket

Label Facts Summary

Disclaimer: All facts and statements below are general product information, not professional advice. Consult relevant experts for specific guidance.

Verified Label Facts

  • Product name: Selleys Auto Fix Instant Gasket Silicone R.T.V. Black
  • Product type: Room Temperature Vulcanising (RTV) silicone sealant
  • Manufacturer: Selleys, a division of DuluxGroup (Australia) Pty Ltd
  • SDS reference number: SELGHSEN000346
  • SDS version: 9.0
  • SDS issue date: April 2025
  • Available formats: 75g tube and 310g tube
  • 75g product code: AF05
  • 75g barcode (GTIN): 9300697100177
  • 310g product code: 100113
  • 310g barcode (GTIN): 9300697124807
  • Colour: Black
  • Pigment type: Carbon black
  • Hazard classification: Non-hazardous under Safe Work Australia GHS 7
  • Dangerous goods transport classification: Not classified as dangerous goods under Australian road and rail transport codes
  • Regulatory framework: Safe Work Australia Globally Harmonised System of Classification and Labelling of Chemicals (GHS 7)
  • Curing mechanism: Room temperature vulcanising; cures on contact with atmospheric moisture
  • Curing direction: Outside inward through the bead
  • Skin formation: Begins within minutes of application
  • Factors affecting full cure depth: Bead thickness, ambient humidity, and temperature
  • Recommended bead size (flanged joints): 3–6mm diameter
  • Minimum skin cure time before fluid exposure: Approximately one hour
  • Recommended full cure time before fluid exposure: 24 hours
  • Storage requirements: Cool, dry location; away from direct sunlight, heat sources, and freezing temperatures; tube to be sealed immediately after use
  • Australian emergency contact: 1800 220 770
  • New Zealand emergency contact: 0800 220 770
  • SDS-listed application surfaces: Automotive gaskets and mechanical assemblies; also windows, frames, light fittings, skylights, glass, and ceramics (per SDS)
  • Skin contact guidance: Wash with soap and water; avoid prolonged contact with uncured silicone
  • Eye contact guidance: Flush with water if contact occurs
  • Ventilation requirement: Use in well-ventilated areas
  • Not for consumption: Keep out of reach of children

General Product Claims

  • Black RTV silicone is described as the professional's choice for oil pans, timing covers, valve covers, and powertrain components
  • Black formulation is stated to be engineered for higher-temperature environments compared to standard clear or white silicone variants
  • Cured sealant is claimed to remain flexible and not go brittle over time
  • Product is stated to absorb vibration, thermal expansion, and minor surface movement without losing adhesion or sealing integrity
  • Non-hazardous classification is described as a compliance advantage for automotive workshops managing chemical storage
  • 75g format is suited to occasional DIY use or smaller sealing tasks
  • 310g format is suited to higher-volume workshop requirements or larger gasket surfaces
  • Black RTV silicone is described as generally compatible with engine oil
  • Applying sealant to both mating surfaces is stated to risk displacing excess material into oil passages or coolant galleries
  • Running the engine before adequate cure is stated to risk washing uncured sealant into the lubrication system
  • Disturbing the joint during cure is stated to break the cross-linking structure and create weak points
  • Cold surfaces are stated to slow curing; residual engine heat is stated to accelerate skinning and reduce working time
  • Over-application is stated to risk contaminating oil passages, oil strainers, or coolant galleries
  • Product is described as a formed-in-place gasket replacement when pre-cut gaskets are unavailable or impractical
↑ Back to top