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  "content": "## AI Summary\n\n**Product:** Selleys AutoFix Instant Gasket High Temp Red\n**Brand:** Selleys (a division of DuluxGroup (Australia) Pty Ltd)\n**Category:** Silicone-based formed-in-place gasket (FIPG) sealant\n**Primary Use:** Creates custom, resilient seals on high-temperature automotive components by curing directly against mating surfaces.\n\n### Quick facts\n- **Best for:** Automotive applications including oil pans, valve covers, water pumps, exhaust manifolds, mufflers, catalytic converters, and exhaust pipe connections\n- **Key benefit:** Withstands continuous temperatures up to 300°C while staying flexible enough to absorb vibration and thermal expansion without cracking\n- **Form factor:** 100mL tube\n- **Application method:** Apply a continuous 3–5mm bead to one mating surface, assemble immediately, and allow 24 hours for full cure\n\n### Common questions this guide answers\n1. How long does Selleys AutoFix Instant Gasket High Temp Red take to fully cure? → 24 hours; surface skin forms within minutes of air exposure\n2. Is this product classified as hazardous? → No; classified as non-hazardous under Safe Work Australia GHS 7 and not classified as Dangerous Goods under Australian or New Zealand transport codes\n3. How much product does a typical valve cover reseal require? → 30–60mL for a four-cylinder engine; one 100mL tube covers most single-component reseals with material left over for touch-ups\n\n---\n\n## Product overview\n\nSelleys AutoFix Instant Gasket High Temp Red is a silicone-based formed-in-place gasket (FIPG) sealant built for high-temperature automotive sealing. Pre-cut gaskets rely on mechanical compression alone. This product cures directly against mating surfaces, creating a custom seal that conforms precisely to surface irregularities. That precision matters most on aging or imperfect engine components where a standard gasket won't do the job.\n\nThe \"High Temp Red\" designation means something. Red silicone is the industry-standard colour for high-temperature RTV (Room Temperature Vulcanising) sealants, rated to handle the sustained thermal cycling found in exhaust systems, oil systems, and coolant circuits. This product is manufactured by Selleys, a division of DuluxGroup (Australia) Pty Ltd, and carries the product code referenced under barcode 9300697133564, confirming its identity as a current, commercially available Australian automotive product.\n\nThis guide is written for anyone with a practical interest in maintaining or repairing their vehicle. Whether you're resealing a leaking valve cover or reinforcing an exhaust manifold joint, knowing how this product works, and how to use it correctly, is the difference between a lasting repair and doing the job twice.\n\n---\n\n## What this product is designed to seal\n\nSelleys AutoFix Instant Gasket High Temp Red works across a full range of demanding automotive applications:\n\n- **Oil pans** — the sump at the base of the engine that holds engine oil\n- **Valve covers** — the panels sitting atop the engine head that protect the valvetrain\n- **Water pumps** — components that circulate coolant through the engine\n- **Exhaust manifolds** — the cast metal component that collects exhaust gases from cylinder ports\n- **Mufflers and tail pipes** — exhaust system components exposed to extreme heat and vibration\n- **Catalytic converters** — emissions control devices operating at very high temperatures\n- **Exhaust pipe connections** — joints between exhaust system sections prone to thermal expansion stress\n\nEvery one of these locations shares a common challenge: significant temperature fluctuation, mechanical vibration, and exposure to fluids or gases under pressure. Standard silicone sealant or a paper gasket won't hold up long-term in these conditions. The high-temperature red formulation stays flexible and adhesive under exactly these stresses.\n\nKnowing your application site before you begin matters. An oil pan reseal demands oil resistance at moderate temperatures. A catalytic converter joint demands peak heat tolerance. This product is formulated to address the full range of these demands.\n\n---\n\n## Key technical characteristics\n\n### High-temperature performance\n\nThis product is built for high-heat environments. RTV silicone sealants in the red formulation category withstand continuous temperatures up to 300°C, with intermittent tolerance reaching higher peaks, which is directly relevant to exhaust manifolds and catalytic converters that can glow red-hot under sustained load.\n\nStandard grey or clear RTV silicones are typically rated to around 200°C. The red high-temp variant is the right choice wherever exhaust gases or extreme thermal cycling are involved. Using an under-rated sealant in these locations risks seal breakdown, fluid leaks, or exhaust gas escape, all of which carry real safety implications.\n\n### RTV silicone chemistry\n\nRTV stands for Room Temperature Vulcanising. The sealant cures through exposure to atmospheric moisture, not heat. This matters practically: the product begins curing the moment it meets air, so the joint must be assembled promptly after application. Full cure takes 24 hours, though surface skin forms within minutes.\n\nThe silicone base gives the finished seal inherent flexibility. Unlike rigid anaerobic sealants, cured silicone absorbs vibration and thermal expansion without cracking. That flexibility is essential for exhaust connections and valve covers, where components expand and contract with every heat cycle.\n\n### Non-hazardous classification\n\nAccording to the Safety Data Sheet (SDS) issued 19 September 2024 (Version 1.0, Reference No. SELFGREN001549), this product is classified as **non-hazardous** under the criteria of Safe Work Australia GHS 7. It is also **not classified as Dangerous Goods** under the Australian Code for the Transport of Dangerous Goods by Road and Rail, nor under New Zealand NZS5433.\n\nFor the everyday user, this means the product does not trigger hazardous goods handling requirements during storage or transport. Standard precautions apply: adequate ventilation, avoiding prolonged skin contact, keeping away from children. No specialist handling procedures are required for domestic automotive use.\n\n### Format and quantity\n\nThe product comes in a 100mL tube. A typical valve cover reseal on a four-cylinder engine uses 30–60mL, depending on the perimeter length and bead thickness applied. A single 100mL tube handles most single-component reseals, with material left over for touch-ups or a second pass if needed. Larger jobs, like an oil pan on a V8 engine, may call for a second tube. Plan ahead and have what you need before you start.\n\n---\n\n## How to use Selleys AutoFix Instant Gasket High Temp Red\n\n### Surface preparation\n\nSurface preparation determines the quality and longevity of your seal. No sealant performs reliably on a contaminated surface.\n\n1. **Remove all old gasket material.** Use a gasket scraper or plastic scraper to clear residual gasket, old sealant, or corrosion from both mating surfaces. Avoid gouging aluminium surfaces with metal tools.\n2. **Clean with solvent.** Wipe both surfaces with a clean, lint-free cloth dampened with a suitable solvent — brake cleaner or isopropyl alcohol work well. Let surfaces dry completely before moving on.\n3. **Ensure surfaces are dry and oil-free.** Even trace oil contamination undermines adhesion. On oil pan applications, drain the oil before disassembly and clean thoroughly.\n\n### Application\n\n1. **Cut the nozzle** to produce a bead diameter suited to the joint. For most automotive seals, a 3–5mm bead delivers the right coverage.\n2. **Apply a continuous, unbroken bead** of sealant around the perimeter of one mating surface, running inside any bolt holes, not outside them, which would allow sealant to enter the engine or exhaust system.\n3. **Assemble the joint immediately.** RTV silicone begins skinning within minutes of air exposure. Any delay between application and assembly reduces bond quality.\n4. **Torque fasteners to specification.** Over-tightening compresses the bead excessively. Under-tightening leaves gaps. Follow the vehicle manufacturer's torque specifications.\n\n### Cure time\n\nAllow a minimum of **1 hour** before introducing any fluid to the sealed joint, and ideally **24 hours** before returning the component to full service. For exhaust applications where fluid exposure is not a factor, shorter wait times are acceptable, but full mechanical strength develops over 24 hours.\n\nDo not apply heat to accelerate cure. RTV silicone cures through moisture, not temperature. Excessive heat applied before cure disrupts the process and undermines the seal.\n\n---\n\n## Safety considerations\n\nThe product's non-hazardous classification keeps things straightforward, but sound workshop practices still apply:\n\n- **Ventilation:** Work in a well-ventilated area. While not classified as hazardous, the acetic acid off-gassing characteristic of some RTV silicones, detectable as a vinegar-like odour during cure, is best managed with good airflow.\n- **Skin and eye contact:** Avoid prolonged skin contact. If contact occurs, wash thoroughly with soap and water. If eye contact occurs, rinse with water and seek medical advice if irritation persists.\n- **Emergency contacts:** The SDS lists Australia emergency telephone 1800 220 770 and New Zealand 0800 220 770 for chemical emergency assistance.\n- **Storage:** Store in a cool, dry location away from direct sunlight. Once opened, reseal the tube and use within a reasonable period — moisture ingress will begin curing the product inside the tube.\n- **Children:** Keep out of reach of children. The non-hazardous classification does not make the product safe for ingestion or misuse.\n\n---\n\n## Tips and best practices\n\n**Less is more with bead thickness.** A common mistake is applying an excessively thick bead. More sealant does not mean a better seal. Excess sealant squeezes inward into the engine or exhaust system on assembly, creating debris that can block oil passages or damage components. A consistent 3–5mm bead is right for most applications.\n\n**Don't reuse the joint immediately after disassembly.** If you need to re-open a joint shortly after sealing, clean both surfaces fully and apply fresh sealant. Partially cured RTV does not re-bond reliably.\n\n**Check for leaks after the first heat cycle.** On oil and coolant applications, inspect the sealed joint after the first warm-up and cool-down cycle. Thermal expansion can reveal any gaps in coverage. A quick inspection at this stage lets you correct a minor seep before it becomes a significant leak.\n\n**Match the product to the location.** This high-temperature red formulation is the right tool for every application listed above. Using a standard-temperature sealant in a high-heat location is a genuine error. When in doubt, the high-temp variant is always the stronger choice.\n\n**Nozzle management.** After use, wipe the nozzle clean and replace the cap. Inserting a screw or nail into the nozzle extends the shelf life of partially used tubes.\n\n---\n\n## Storage and shelf life\n\nStore the product in a cool, dry environment away from direct sunlight and extreme temperatures. Heat and humidity accelerate in-tube curing and shorten usable shelf life. An unopened tube stored correctly remains usable for 12–18 months — check the product packaging for the manufacturer's stated expiry.\n\nOnce opened, keep air exposure to a minimum between uses. A tube that has begun to skin internally at the nozzle can often be cleared by extruding a small amount before use. If the product has cured significantly within the tube, replace it. Starting a job with fresh sealant is always the right move.\n\n---\n\n## References\n\n- [Selleys AutoFix Instant Gasket High Temp Red – Selleys Australia Product Page](https://www.selleys.com.au)\n- [Safety Data Sheet: SELLEYS AUTOFIX INSTANT GASKET HIGH TEMP RED (Reference No. SELFGREN001549, Issued 19 September 2024)](https://www.selleys.com.au) — Based on manufacturer documentation provided\n- [Safe Work Australia – Globally Harmonised System of Classification and Labelling of Chemicals (GHS)](https://www.safeworkaustralia.gov.au/safety-topic/hazardous-work/hazardous-chemicals/ghs)\n- [Australian Code for the Transport of Dangerous Goods by Road and Rail – National Transport Commission](https://www.ntc.gov.au/transport-standards/australian-code-transport-dangerous-goods-road-rail)\n\n## Frequently asked questions\n\nWhat is Selleys AutoFix Instant Gasket High Temp Red: A silicone-based formed-in-place gasket sealant\n\nWhat does FIPG stand for: Formed-In-Place Gasket\n\nWho manufactures this product: Selleys, a division of DuluxGroup (Australia) Pty Ltd\n\nWhat is the product barcode: 9300697133564\n\nWhat volume does the tube contain: 100mL\n\nWhat colour is this product: Red\n\nWhy is high-temp RTV sealant coloured red: Red is the industry-standard colour coding for high-temperature RTV sealants\n\nWhat does RTV stand for: Room Temperature Vulcanising\n\nHow does RTV silicone cure: Through exposure to atmospheric moisture\n\nDoes RTV silicone cure with heat: No, it cures through moisture exposure\n\nWhat is the maximum continuous temperature rating: 300°C\n\nCan it handle temperatures above 300°C intermittently: Yes, intermittent peaks exceed 300°C\n\nWhat is the typical rating for standard grey or clear RTV silicone: Around 200°C\n\nIs this product rated higher than standard grey silicone: Yes, it is rated significantly higher\n\nIs this product classified as hazardous: No, it is classified as non-hazardous\n\nWhich safety standard governs its non-hazardous classification: Safe Work Australia GHS 7\n\nIs it classified as Dangerous Goods for road transport: No\n\nIs it classified as Dangerous Goods under New Zealand NZS5433: No\n\nWhat is the SDS reference number: SELFGREN001549\n\nWhen was the Safety Data Sheet issued: 19 September 2024\n\nWhat is the SDS version number: Version 1.0\n\nWhat is the Australian chemical emergency telephone number: 1800 220 770\n\nWhat is the New Zealand chemical emergency telephone number: 0800 220 770\n\nIs the product safe for children to use: No, keep out of reach of children\n\nDoes the non-hazardous classification mean it is safe to ingest: No\n\nShould you work in a ventilated area: Yes\n\nWhat odour may be present during cure: A vinegar-like odour from acetic acid off-gassing\n\nWhat should you do if skin contact occurs: Wash thoroughly with soap and water\n\nWhat should you do if eye contact occurs: Rinse with water and seek medical advice if irritation persists\n\nIs prolonged skin contact recommended: No, avoid prolonged skin contact\n\nCan it seal oil pans: Yes\n\nCan it seal valve covers: Yes\n\nCan it seal water pumps: Yes\n\nCan it seal exhaust manifolds: Yes\n\nCan it seal mufflers and tail pipes: Yes\n\nCan it seal catalytic converters: Yes\n\nCan it seal exhaust pipe connections: Yes\n\nIs it suitable for high-vibration environments: Yes\n\nIs the cured sealant flexible or rigid: Flexible\n\nWhy is flexibility important for exhaust applications: Components expand and contract with every heat cycle\n\nDoes it conform to surface irregularities: Yes\n\nIs it better than pre-cut gaskets on imperfect surfaces: Yes, it conforms precisely to surface irregularities\n\nHow long does full cure take: 24 hours\n\nHow quickly does surface skin formation occur: Within minutes of air exposure\n\nWhat is the minimum wait time before introducing fluid to the joint: 1 hour\n\nShould you apply heat to accelerate cure: No\n\nDoes applying heat before cure damage the seal: Yes, it disrupts the curing process\n\nHow much product does a typical four-cylinder valve cover reseal use: 30–60mL\n\nWill one 100mL tube cover most single-component reseals: Yes\n\nMay a V8 oil pan reseal require a second tube: Yes\n\nWhat bead diameter is recommended for most automotive seals: 3–5mm\n\nShould the bead be continuous or intermittent: Continuous and unbroken\n\nShould the bead run inside or outside bolt holes: Inside bolt holes\n\nWhat happens if sealant is applied outside bolt holes: Sealant can enter the engine or exhaust system\n\nWhat is the first surface preparation step: Remove all old gasket material\n\nWhat tool is recommended for removing old gasket material: A gasket scraper or plastic scraper\n\nShould metal scrapers be used on aluminium surfaces: No, avoid gouging aluminium\n\nWhat solvent is recommended for cleaning surfaces: Brake cleaner or isopropyl alcohol\n\nWhat cloth type should be used for solvent cleaning: A clean, lint-free cloth\n\nMust surfaces be dry before applying sealant: Yes, completely dry\n\nMust surfaces be oil-free before applying sealant: Yes\n\nShould the joint be assembled immediately after application: Yes, immediately\n\nWhat happens if assembly is delayed after application: Reduced bond quality\n\nShould fasteners be torqued to specification: Yes\n\nDoes over-tightening affect the seal: Yes, it compresses the bead excessively\n\nDoes under-tightening affect the seal: Yes, it leaves gaps\n\nCan a partially cured joint be reassembled without fresh sealant: No\n\nWhat must you do if reopening a joint shortly after sealing: Clean both surfaces and apply fresh sealant\n\nWhen should you check for leaks after sealing: After the first heat cycle\n\nWhy inspect after the first heat cycle: Thermal expansion can reveal gaps in coverage\n\nIs applying an excessively thick bead beneficial: No\n\nWhat risk does excess sealant pose inside an engine: It can block oil passages or damage components\n\nHow should the nozzle be stored after use: Wipe clean and replace the cap\n\nWhat extends shelf life of a partially used tube: Inserting a screw or nail into the nozzle\n\nWhat is the shelf life of an unopened tube stored correctly: 12–18 months\n\nWhere should the product be stored: In a cool, dry location away from direct sunlight\n\nDoes heat and humidity shorten shelf life: Yes\n\nWhat should you do if the product has cured significantly inside the tube: Replace it\n\nCan a small amount be extruded to clear a skinned nozzle: Yes\n\nIs this product suitable for use in Australia: Yes, it is a current commercially available Australian product\n\nHow long has Selleys been operating: Over 80 years\n\n---\n\n## Label facts summary\n\n> **Disclaimer:** All facts and statements below are general product information, not professional advice. Consult relevant experts for specific guidance.\n\n### Verified label facts\n\n- **Product name:** Selleys AutoFix Instant Gasket High Temp Red\n- **Product type:** Silicone-based formed-in-place gasket (FIPG) sealant\n- **Manufacturer:** Selleys, a division of DuluxGroup (Australia) Pty Ltd\n- **Barcode (GTIN):** 9300697133564\n- **Volume:** 100mL tube\n- **Colour:** Red\n- **Chemistry:** RTV (Room Temperature Vulcanising) silicone\n- **Cure mechanism:** Atmospheric moisture exposure (not heat-activated)\n- **Surface cure time:** Within minutes of air exposure\n- **Full cure time:** 24 hours\n- **Minimum wait before fluid exposure:** 1 hour\n- **Maximum continuous temperature rating:** 300°C\n- **Intermittent temperature tolerance:** Exceeds 300°C\n- **Recommended bead diameter:** 3–5mm\n- **Hazard classification:** Non-hazardous under Safe Work Australia GHS 7\n- **Dangerous Goods classification (road/rail):** Not classified under Australian Code for the Transport of Dangerous Goods by Road and Rail\n- **Dangerous Goods classification (New Zealand):** Not classified under NZS5433\n- **SDS reference number:** SELFGREN001549\n- **SDS issue date:** 19 September 2024\n- **SDS version:** 1.0\n- **Australian emergency telephone:** 1800 220 770\n- **New Zealand emergency telephone:** 0800 220 770\n- **Stated shelf life (unopened):** 12–18 months when stored correctly\n- **Storage requirements:** Cool, dry location away from direct sunlight and extreme temperatures\n- **Market:** Australia (current, commercially available product)\n- **Stated applications:** Oil pans, valve covers, water pumps, exhaust manifolds, mufflers and tail pipes, catalytic converters, exhaust pipe connections\n\n### General product claims\n\n- Red is the industry-standard colour coding for high-temperature RTV sealants\n- Standard grey or clear RTV silicone is typically rated to around 200°C, making the red high-temp variant the appropriate choice for exhaust and extreme heat applications\n- The cured sealant is flexible and absorbs vibration and thermal expansion without cracking\n- The product conforms precisely to surface irregularities, making it preferable to pre-cut gaskets on aging or imperfect components\n- A 100mL tube is sufficient for most single-component reseals, with material remaining for touch-ups\n- A four-cylinder valve cover reseal typically requires 30–60mL\n- Larger jobs such as a V8 oil pan reseal may require a second tube\n- Excess sealant applied outside bolt holes risks entering the engine or exhaust system and blocking oil passages or damaging components\n- Applying heat before cure disrupts the curing process and undermines seal integrity\n- Partially cured RTV does not re-bond reliably; fresh sealant must be applied if a joint is reopened\n- Inspecting the sealed joint after the first heat cycle allows early detection of gaps before minor seeps become significant leaks\n- Inserting a screw or nail into the nozzle after use extends shelf life of partially used tubes\n- Selleys has over 80 years of operating history",
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