What is Selleys Oven Plus Heavy Duty Gel, and where should you use it?
Selleys Oven Plus Heavy Duty Gel is a no-fumes, caustic-based heavy duty oven cleaner in gel form, supplied in a 400 g plastic bottle with a brush-head applicator. It removes stubborn burnt-on grease and grime from oven walls, floors and racks, and it is also rated for cookware and bakeware — which is what separates it from a conventional oven-only spray.
Two things distinguish it in use. The first is that it produces no fumes, which makes it the sensible choice if the smell of an aerosol oven cleaner is the reason you have been putting the job off. The second is that it is a warm-application product: the current formula must go onto warm surfaces, and Selleys' claim of twice the cleaning power is measured against the previous cold-surfaces formula on exactly that basis.
Before you buy, understand what "caustic-based" means for handling. The gel has a pH of 13.5 and is classified as corrosive — it may produce severe burns. Protective gloves and eye protection are mandatory, not advisory.
Technical specification
| Property | Typical result |
|---|---|
| Colour | Dark blue |
| Density | ~ 1.06 |
| pH | 13.5 ± 0.5 |
| Packaging | Plastic bottle, 400 g |
| Oven preheat | No more than 90°C, then switched off and stood for 10 minutes |
| Dwell time | 30 minutes |
| Hazard | Corrosive — may produce severe burns |
Indicative data only, not intended for the preparation of specifications.
What the key numbers mean in practice
The 90°C preheat is a ceiling, not a target. Selleys is explicit that you must not overheat the oven, because surfaces may be affected. Most domestic ovens do not mark anything below 100°C clearly, so set the dial to its lowest setting rather than trying to hit 90°C precisely, and give it only a few minutes.
The 10 minute stand is what makes the job safe to do. After preheating you switch the oven off, open the door, and let it stand for 10 minutes before applying anything. That interval takes the cavity from "too hot to work in" down to warm — warm enough for the formula to work as designed, cool enough that you are not reaching into a hot oven with a bottle of corrosive gel. Selleys' safety directions include "beware of hot surfaces" for exactly this reason. Do not skip the 10 minutes to save time.
The 30 minute dwell is where the product does its work, not the scrubbing. Apply a thin layer, close the door, and leave it. The instruction is a thin gel layer — piling it on does not shorten the 30 minutes, and it makes the wipe-off harder. If a section is still stubborn after the dwell, a non-scratch scourer is the correct escalation; the brush-head is for spreading gel and is explicitly not meant for scouring.
A pH of 13.5 is the number that justifies the whole exclusion list below. At that strength the product attacks the metals and finishes it is not meant to touch, which is why aluminium, copper and galvanised steel appear alongside painted surfaces and plastics. Follow the "immediately rinse thoroughly" instruction as written — the rinse is not a tidy-up step, it is what stops the product continuing to work on a surface after you have finished with it.
Where to use it
- Oven surfaces — back wall, side walls, floor, roof and door
- Oven racks
- Cookware and bakeware, including heavily soiled surfaces and long-term stubborn stains
Selleys also states that removing grease and grime helps stop bacteria from flourishing, which is the practical hygiene argument for cleaning an oven rather than living with it.
How to apply it
- Check your oven's instruction manual before using this caustic-based product.
- Make sure the room is well ventilated, and wear rubber gloves and eye protection.
- Preheat the oven to no more than 90°C. Do not overheat — surfaces may be affected.
- Switch the oven off, open the door, and allow it to stand for 10 minutes before applying the product to the warm oven surfaces.
- Shake the bottle well before use.
- Apply a thin gel layer, either by squeezing and spreading with the brush-head, or by squeezing onto a dry sponge first and then applying.
- For oven surfaces: remove the racks. Apply to the back wall, then the side walls, then the floor. Apply to the roof by squeezing onto a dry sponge and applying. Finish with the door. Place folded paper towels between the bottom of the door and the oven floor, and close the door to prevent seepage.
- For oven racks: lay newspaper on the draining board. Squeeze gel onto the newspaper and dab the bristles in it. Hold the racks up vertically on the draining board and apply by running the bristles along the bars. Place the racks back in the oven.
- Let it stand for 30 minutes, then wipe with a damp cloth — a Selleys Super Cloth is suitable. Use a non-scratch scourer on stubborn sections.
- Immediately rinse surfaces thoroughly.
- For cookware and bakeware: rinse thoroughly to remove any residue, then wipe the surfaces dry immediately after rinsing.
- After cleaning carbon steel or cast iron, oil the surfaces to help prevent flash rusting.
That last step is easy to miss and expensive to get wrong. Carbon steel and cast iron come out of this process stripped and bare, and Selleys states they must be oiled after cleaning to avoid flash rusting. Have the oil ready before you start, not after.
Limitations — where it must NOT be used
- Not suitable for self-cleaning or continuous-cleaning ovens.
- Check the oven manufacturer's directions before using the cleaner.
- Do not use on: pilot lights, electrical connections, switches, heating elements, thermostats, fans, rubber seals, exterior oven surfaces, benchtops, aluminium, copper, linoleum, painted surfaces, plastic, glass, chrome, galvanised steel, or damaged or scratched non-stick cookware and bakeware.
- Do not overheat the oven — no more than 90°C, as surfaces may be affected.
- The brush-head is for spreading gel only, not for scouring.
- Do not swallow. Keep out of reach of children.
The exclusion list is worth walking your eye over before you open the bottle rather than after. In a fan-forced oven the fan and its surround are on the list; so is every rubber seal around the door; so is the glass. Those are all things you will be working right next to.
Safety
The product is corrosive and may produce severe burns. Do not swallow it, keep it out of reach of children, avoid contact with skin and eyes, wear protective gloves and eye protection, and beware of hot surfaces while working. Ensure the room is well ventilated. Read the safety directions before using, and refer to the product Safety Data Sheet for full warnings, first aid and shipping information.
Storage
Store in a cool, dry, well-ventilated place out of direct sunlight, and away from foodstuffs.
Hazard classification
Classified as hazardous under Safe Work Australia GHS 7, with the signal word Danger.
- Corrosive. Causes severe skin burns and eye damage.
- Poison Schedule 5 (Caution).
Classified as Dangerous Goods Class 8 (corrosive) under the Australian Code for the Transport of Dangerous Goods by Road & Rail and New Zealand NZS 5433. Hazchem code 2X.
What is in it
| Chemical entity | CAS number | Proportion (w/w) |
|---|---|---|
| Sodium hydroxide | 1310-73-2 | Present — proportion not stated |
| Monoethanolamine | 141-43-5 | 1–10% |
| EDTA tetrasodium salt | 64-02-8 | 1–10% |
| Benzenesulfonic acid, C10-16-alkyl derivatives | — | 1–10% |
| Mineral oils, non-ionic surfactants, other non-hazardous | 68584-22-5 | Balance |
This is caustic soda in a gel. Sodium hydroxide and monoethanolamine together are what strip carbonised fat, and they are also why the product is classified corrosive rather than irritant.
The gel format is the safety-relevant difference from an aerosol oven cleaner: there is no propellant and no mist, so the inhalation and flammability hazards are much lower, but the material stays put on a vertical surface and stays wet for longer. That means a splash or a smear has more contact time with skin — and with a Class 8 corrosive, contact time is what determines how deep the burn goes.
Alkali burns are also slower to announce themselves than acid burns and keep penetrating tissue, so flush immediately and for longer than feels necessary. Wear chemical-resistant gloves and eye protection throughout, and keep it off aluminium and other reactive metals.
Protection
- Gloves — nitrile rubber for intermittent contact; assess against your own conditions.
- Eye protection — chemical goggles or safety glasses.
- Ventilation — use only in a well-ventilated area, with local exhaust where available. Vapour is heavier than air and collects in hollows; do not work in a confined space.
- Clothing — wash hands before eating, drinking or smoking, and wash contaminated clothing before reuse.
First aid
| Exposure | What to do |
|---|---|
| Eyes | Irrigate immediately with copious running water for at least 15 minutes, holding the eyelids apart. Urgently seek medical assistance and go to hospital. A caustic burn to the eye can cause corneal damage and permanent loss of vision. |
| Skin | Remove all contaminated clothing immediately and wash the area with plenty of water. Seek medical attention — this product causes severe burns, not irritation. Do not break blisters. |
| Inhalation | Move the person to fresh air, keep them at rest and warm, and seek medical advice if effects persist. |
| Swallowed | Do not induce vomiting. Rinse the mouth with water and seek immediate medical attention. |
If poisoning occurs, contact a doctor or the Poisons Information Centre — 131 126 in Australia, 0800 764 766 in New Zealand — with the container to hand. Selleys emergency line: 1800 220 770 in Australia, 0800 220 770 in New Zealand.
Common questions about Selleys Oven Plus Heavy Duty Gel
Does the oven need to be warm?
Yes. The product must be applied to warm surfaces. Preheat to no more than 90°C, switch off, open the door, and stand for 10 minutes before applying.
How long do I leave it on?
30 minutes, then wipe with a damp cloth and immediately rinse thoroughly.
Does it smell?
It is described as a no-fumes oven cleaner, which is its main point of difference from aerosol oven cleaners.
Do I have to scrub?
No scrubbing is required for the general clean. Use a non-scratch scourer only on stubborn sections — and not the brush-head, which is for spreading gel.
Can I use it on my baking trays and pots?
Yes, cookware and bakeware are listed uses, including long-term stubborn stains. Rinse them thoroughly afterwards to remove all residue and wipe them dry immediately.
What about cast iron?
You can clean it, but carbon steel and cast iron surfaces must be oiled after cleaning to avoid flash rusting.
Can I use it on non-stick bakeware?
Not on damaged or scratched non-stick cookware or bakeware.
Can I use it in a self-cleaning oven?
No. It is not suitable for self-cleaning or continuous-cleaning ovens. Check your oven manufacturer's directions first.
Can I use it on the oven door glass?
No. Glass is on the do-not-use list, along with the exterior oven surfaces, plastic and painted surfaces.
How dangerous is it?
It is corrosive and may produce severe burns, with a pH of about 13.5. Wear protective gloves and eye protection, keep it away from skin and eyes, do not swallow it, and keep it out of reach of children.
What size does it come in?
A 400 g plastic bottle.
What does "2x cleaning power" mean?
It is Selleys' comparison of the current formula against the previous cold-surfaces formula, and it applies only when the product is used as directed on warm surfaces.
What should I use for light everyday spills instead?
Selleys Oven Wipes are the maintenance option for everyday grease and food spills. Selleys Oven Clean is the aerosol alternative for heavy duty work.
What is Selleys Oven Plus Heavy Duty Gel used for?
Selleys Oven Plus Heavy Duty Gel is a caustic-based, heavy-duty interior oven cleaner designed to remove tough baked-on grease and grime from oven surfaces, oven racks, cookware, and bakeware.
What size does Selleys Oven Plus Heavy Duty Gel come in?
It comes in a 400g tube.
What colour is Selleys Oven Plus Heavy Duty Gel?
The gel is blue (dark blue).
What safety precautions should be taken when using Selleys Oven Plus Heavy Duty Gel?
Ensure the room is well ventilated and wear rubber gloves and eye protection when using the product.
What surfaces should Selleys Oven Plus Heavy Duty Gel NOT be used on?
It should not be used on pilot lights, electrical connections, switches, heating elements, thermostats, rubber seals, exterior oven surfaces, bench tops, aluminium, copper, linoleum, painted surfaces, plastic, glass, chrome or galvanised steel, or damaged/scratched 'non-stick' cookware/bakeware. It is also not suitable for self-cleaning or continuous cleaning ovens.
How should Selleys Oven Plus Heavy Duty Gel be applied to oven surfaces?
Preheat the oven to no more than 90°C, then switch it off, open the door, and let it stand for 10 minutes. Shake the gel well, then apply a thin layer using the brush-head or a dry sponge onto the back wall, then side-walls, floor, roof, and finally the door, placing folded paper towels between the bottom of the door and oven floor to prevent seepage. Let the gel stand for 30 minutes before wiping with a damp cloth (using a non-scratch scourer for stubborn sections) and rinsing thoroughly.
How do you clean oven racks with this product?
Lay newspaper on a draining board, squeeze gel onto the newspaper and dab the bristles in the gel, then hold the racks vertically on the draining board and apply by running the bristles along the bars before placing the racks back in the oven.
What should be done after cleaning carbon steel or cast iron cookware with this gel?
After cleaning, carbon steel and cast iron surfaces must be oiled to help prevent flash rusting.
What technology does Selleys Oven Plus Heavy Duty Gel use?
It uses caustic-based technology.
What is the pH level of Selleys Oven Plus Heavy Duty Gel?
According to the knowledge base, the pH level is 13.5 ± 0.5.