AI Summary

Product: Selleys RP7 Multi-Purpose Lubricant Spray 300g Brand: Selleys (a division of DuluxGroup Australia) Category: Automotive & Car Care — Lubricants & Penetrating Oils Primary Use: A petroleum-based aerosol penetrating oil and lubricant that frees seized components, lubricates moving parts, displaces moisture, and protects metal surfaces against corrosion.

Quick Facts

Best For: Trade and DIY users tackling automotive, household, and workshop maintenance — rust, seized fasteners, squeaking hinges, moisture-damaged electrical components
Key Benefit: Penetrates rust and corrosion via capillary action to free seized components, then leaves a protective lubricating film
Form Factor: 300g pressurised aerosol can (net weight of product contents, not can volume)
Application Method: Shake the can, hold 15–20 cm from the surface and spray directly, or attach the included extension straw for confined spaces

Common Questions This Guide Answers

Is Selleys RP7 aerosol flammable? → Yes — keep it away from open flames, sparks, and heat sources
How long should RP7 dwell on a seized fastener? → Several minutes to several hours depending on corrosion severity; reapplying during dwell time improves penetration
Can RP7 be used on rubber seals or plastics? → Not recommended without testing first — the petroleum-based formula can degrade certain plastics and rubber compounds over time

Product Overview

Selleys RP7 Multi-Purpose Lubricant Spray is a petroleum-based aerosol product manufactured by Selleys, a division of DuluxGroup Australia. It comes in a 300g aerosol can and has built a solid reputation in the Australian trade and DIY market for handling common mechanical and maintenance problems: rust penetration, lubrication, moisture displacement, and surface protection.

Important note on this guide: The product listed is the Selleys RP7 Multi-Purpose Lubricant Spray 300g (an aerosol lubricant). However, the specification data provided describes the Selleys RP7 Degreaser (Trigger 500mL) — a different product in the RP7 range. Where the two products differ, this guide clearly distinguishes between them. Specifications drawn directly from the provided data are noted accordingly; details about the aerosol lubricant are based on manufacturer documentation and publicly available product information.

What Selleys RP7 Is — and What It Does

RP7 is a petroleum-based aerosol formulated to do several things at once: penetrate rust and corrosion to free seized or stuck components, lubricate moving parts to reduce friction and wear, displace moisture from electrical and mechanical surfaces, and leave a light protective film that resists future corrosion.

The "RP" stands for Rust Penetrant — and the product has earned that name over decades of use in Australian workshops, homes, and vehicles. The 300g aerosol delivers the formula as a fine, controlled spray through a directional nozzle.

This product sits in the Automotive & Car Care > Lubricants & Penetrating Oils category, which reflects its primary strength as a maintenance tool for mechanical systems — though its applications go well beyond vehicles.

Key Functions and How They Work

Rust and Corrosion Penetration

The core strength of RP7 is penetrating rust. The formula wicks into microscopic gaps between corroded metal surfaces — a rusted bolt and its thread, for example — through capillary action. The low-viscosity carrier fluid delivers active ingredients that break down iron oxide (rust) and release the bond between seized components.

This is where RP7 earns its reputation in automotive maintenance. Fasteners, hinges, brake components, and exhaust fittings face constant exposure to moisture, road salt, and heat cycling — conditions that accelerate corrosion quickly. RP7 cuts through it.

Lubrication

Once rust is penetrated and components are freed, RP7 leaves a lubricating film on surfaces. This reduces metal-to-metal friction in moving parts — hinges, chains, cables, and sliding mechanisms. The film is intentionally light, making it the right choice for general maintenance rather than high-load bearing applications.

Moisture Displacement

RP7 is hydrophobic — it repels water and actively displaces existing moisture from surfaces. This matters for electrical connectors, ignition components, and distributor caps where water ingress causes shorts, misfires, or corrosion. Spray RP7 onto a wet electrical contact and it displaces the water, restores conductivity, and protects against future moisture intrusion.

Corrosion Protection

The residual film left after application creates a barrier against oxygen and moisture, slowing the return of rust and corrosion. Applied to clean metal surfaces, RP7 keeps them in service condition and extends the life of components that matter.

The 300g Aerosol Format

The 300g figure refers to the net weight of the product contents, not the can volume. Aerosol lubricants are sold by weight because the propellant and product are mixed together, and weight is the most accurate measure of usable formula delivered.

The aerosol delivery system has real practical advantages on the job:

Directional spray: The nozzle delivers product precisely to tight spaces, threads, and recessed components with minimal waste.
Consistent pressure: The pressurised can maintains consistent spray output from first use to last, unlike pump sprays that vary with each stroke.
Straw attachment: RP7 aerosols include a thin plastic extension tube that clips to the nozzle, allowing the spray to reach into confined spaces such as lock cylinders, hinges, and cable housings.

The 300g size suits general household and light trade use — enough product for ongoing maintenance without the bulk of larger trade formats available across the RP7 range.

Practical Applications

Automotive Maintenance

Freeing rusted or seized bolts, nuts, and fasteners before removal
Lubricating door hinges, bonnet releases, and boot mechanisms
Treating corroded battery terminals (spray, then wipe clean)
Protecting electrical connectors from moisture
Lubricating throttle and clutch cables
Treating squeaking brake hardware (backing plates and slide pins — not friction surfaces)

General Home and Workshop Use

Freeing stuck locks and lubricating key cylinders
Silencing squeaking hinges on doors, gates, and cabinetry
Protecting garden tools, blades, and metal surfaces from rust between uses
Loosening corroded screws in appliances and furniture
Lubricating bicycle chains and derailleur pivots (light use)

Electrical and Electronic Applications

Displacing moisture from ignition systems, fuse boxes, and connectors
Treating corroded switch contacts
Protecting outdoor electrical junction boxes

How to Use Selleys RP7 Effectively

Preparation

Shake the can before use to ensure the formula is fully mixed. For penetration tasks, remove as much surface rust or debris as possible with a wire brush or cloth before applying — this lets the product reach the metal interface directly rather than sitting on top of contamination.

Application

Hold the can approximately 15–20 cm from the surface for a broad spray, or attach the extension straw for precision application. Apply liberally to the target area and allow dwell time. For seized fasteners, leave the product to penetrate for several minutes to several hours depending on the severity of corrosion. Reapplying during the dwell period drives penetration deeper.

For lubrication tasks, a lighter application is the right approach. Wipe away excess product after application to prevent dust and debris from accumulating on the lubricant film.

For moisture displacement, spray directly onto the affected surface and allow to dry — no wiping necessary in most cases.

After Application

On fasteners, attempt removal after the recommended dwell time. If resistance remains, reapply and wait again. Applying heat (where safe) to the surrounding metal accelerates penetration by expanding the metal and opening gaps in the corrosion — a technique tradespeople have relied on for years.

Storage and Handling

As an aerosol product, Selleys RP7 requires specific storage conditions to perform well and remain safe:

Store upright in a cool, dry, well-ventilated location away from direct sunlight and heat sources. Aerosol cans are pressurised and must not be exposed to temperatures above 50°C.
Keep away from open flames and ignition sources — the aerosol propellant and petroleum-based formula are flammable.
Store away from oxidising agents.
Keep out of reach of children.

Do not puncture, crush, or incinerate the can — even when empty. Residual propellant remains pressurised after the product is exhausted.

Safety Considerations

Flammability

The aerosol lubricant format is flammable — an important distinction from the Selleys RP7 Degreaser (Trigger 500mL) described in the provided specification data, which is classified as non-hazardous and non-dangerous goods. Keep the aerosol lubricant away from open flames, sparks, and hot surfaces, and ensure adequate ventilation when using in enclosed spaces.

Personal Protective Equipment

For general use:

Eye protection: Safety glasses when spraying overhead or in confined spaces where blowback is possible.
Skin protection: Avoid prolonged or repeated skin contact with petroleum-based products. Nitrile gloves are recommended for extended use.
Ventilation: Work in well-ventilated areas or outdoors where possible. Avoid inhaling aerosol mist.

First Aid

Eye contact: Flush with clean water for several minutes. Seek medical advice if irritation persists.
Skin contact: Wash with soap and water. Remove contaminated clothing.
Ingestion: Do not induce vomiting. Rinse mouth, drink water, and seek medical advice immediately.
Inhalation: Move to fresh air. Seek medical advice if symptoms such as dizziness or nausea persist.

Disposal

Aerosol cans must be disposed of in accordance with local council regulations. Many Australian councils accept empty aerosol cans in recycling — check local guidelines to confirm. Do not dispose of pressurised cans in general waste or expose to heat during disposal.

Expert Tips

For badly seized fasteners: Apply RP7, then tap the fastener sharply with a hammer to create micro-vibrations that drive the penetrant deeper into the thread. Repeat the application and tapping cycle before attempting to turn the fastener. Give it time — it works.

Preventing rust on tools: A light wipe of RP7 on clean metal tool surfaces before storage creates a protective film that extends the service life of hand tools in humid environments. A small step with long-term payoff.

Electrical contacts: When treating corroded battery terminals, disconnect the battery first. Apply RP7, scrub with a wire brush, then wipe clean. The product breaks down the corrosion and protects the clean metal surface.

Avoid on plastic and rubber: Petroleum-based products can degrade certain plastics and rubber compounds over time. Test on an inconspicuous area before applying to plastic components, rubber seals, or painted surfaces where contact is unavoidable.

Straw storage: The extension straw is easily lost on a busy job. Tape it directly to the can between uses — it'll be there when you need it.

References

Selleys RP7 Product Page — Selleys Australia
Selleys RP7 Safety Data Sheet — DuluxGroup / Selleys
Safe Work Australia — Globally Harmonised System (GHS) of Classification and Labelling of Chemicals
Australian Dangerous Goods Code (ADG Code) — National Transport Commission Australia
Based on manufacturer specifications provided for Selleys RP7 Degreaser (Trigger 500mL) — DuluxGroup Australia.

Frequently Asked Questions

What is Selleys RP7: A multi-purpose lubricant and penetrating oil spray

What does RP7 stand for: Rust Penetrant 7

Who manufactures Selleys RP7: Selleys, a division of DuluxGroup Australia

What format does Selleys RP7 come in: 300g aerosol can

What does the 300g measurement refer to: Net weight of product contents, not can volume

Why is aerosol lubricant sold by weight: Weight is the most accurate measure of usable formula

What is the primary function of RP7: Penetrating rust and corrosion to free seized components

Does RP7 lubricate moving parts: Yes

Does RP7 displace moisture: Yes

Does RP7 protect against future corrosion: Yes

How does RP7 penetrate rust: Via capillary action through microscopic gaps in corroded surfaces

What does RP7 break down chemically: Iron oxide (rust)

Is RP7 petroleum-based: Yes

Is RP7 flammable: Yes, the aerosol lubricant format is flammable

Is the RP7 Degreaser (Trigger 500mL) flammable: No, it is classified as non-hazardous

Is RP7 aerosol classified as dangerous goods: Yes, due to flammability

Can RP7 be used on electrical components: Yes

Does RP7 protect electrical connectors from moisture: Yes

Can RP7 treat corroded battery terminals: Yes

Should the battery be disconnected before treating terminals with RP7: Yes

Can RP7 free seized bolts and nuts: Yes

Can RP7 be used on door hinges: Yes

Can RP7 silence squeaking hinges: Yes

Can RP7 lubricate bicycle chains: Yes, for light use

Can RP7 be used on lock cylinders: Yes

Can RP7 be used on throttle and clutch cables: Yes

Can RP7 be used on brake components: Yes, on backing plates and slide pins only

Should RP7 be applied to brake friction surfaces: No

Does the 300g can include an extension straw: Yes

What is the extension straw used for: Reaching confined spaces like lock cylinders and cable housings

How far should the can be held from the surface: Approximately 15–20 cm for broad spray

Should the can be shaken before use: Yes

How long should RP7 dwell on a seized fastener: Several minutes to several hours depending on corrosion severity

Does reapplication during dwell time improve penetration: Yes

Does applying heat improve RP7 penetration on seized fasteners: Yes, where safe to do so

Why does heat help RP7 penetration: Heat expands metal, opening gaps in corrosion

Should excess lubricant be wiped away after application: Yes, for lubrication tasks

Is wiping necessary after moisture displacement application: No, allow to dry

Can RP7 be used to protect garden tools from rust: Yes

Can RP7 protect hand tools in storage: Yes, a light wipe before storage is recommended

Is RP7 safe for use on rubber seals: Not recommended without testing first

Is RP7 safe for use on plastics: Test on inconspicuous area first

Can RP7 degrade rubber compounds over time: Yes, petroleum-based products can

Can RP7 degrade certain plastics over time: Yes

What is the maximum safe storage temperature for the aerosol can: 50°C

Should RP7 be stored upright: Yes

Should RP7 be stored away from heat sources: Yes

Should RP7 be stored away from open flames: Yes

Should RP7 be stored away from oxidising agents: Yes

Should RP7 be kept out of reach of children: Yes

Can the aerosol can be punctured: No

Can the aerosol can be incinerated: No, even when empty

Does residual propellant remain after product is exhausted: Yes

What eye protection is recommended when using RP7: Safety glasses, especially when spraying overhead

What skin protection is recommended for extended RP7 use: Nitrile gloves

Should RP7 be used in well-ventilated areas: Yes

What should be done if RP7 contacts eyes: Flush with clean water for several minutes

Should vomiting be induced if RP7 is ingested: No

What should be done if RP7 is ingested: Rinse mouth, drink water, seek medical advice immediately

What should be done if RP7 mist is inhaled: Move to fresh air immediately

What should be done if symptoms persist after inhalation: Seek medical advice

How should empty RP7 aerosol cans be disposed of: In accordance with local council regulations

Can empty RP7 aerosol cans be recycled: Check local council guidelines to confirm

Can empty RP7 aerosol cans go in general waste: No

What technique helps penetrate badly seized fasteners: Tap fastener sharply after applying RP7 to create micro-vibrations

How should the extension straw be stored between uses: Tape it directly to the can

What product category does RP7 belong to: Automotive & Car Care — Lubricants & Penetrating Oils

Is RP7 suitable for high-load bearing applications: No, the lubricant film is light

Is RP7 suitable for general household maintenance: Yes

Is RP7 suitable for trade use: Yes

Who is RP7 trusted by in Australia: Trade and DIY market users

Is RP7 suitable for outdoor electrical junction boxes: Yes

Can RP7 treat corroded switch contacts: Yes

Does RP7 protect ignition systems from moisture: Yes

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 RP7 Multi-Purpose Lubricant Spray
Manufacturer: Selleys, a division of DuluxGroup Australia
Format: 300g aerosol can
Net weight: 300g (refers to product contents, not can volume)
Product category: Automotive & Car Care — Lubricants & Penetrating Oils
Base formula: Petroleum-based
Flammability: Flammable (aerosol lubricant format)
Dangerous goods classification: Yes, due to flammability
Maximum safe storage temperature: 50°C
Storage orientation: Upright
Storage requirements: Cool, dry, well-ventilated location; away from direct sunlight, heat sources, open flames, and oxidising agents; keep out of reach of children
Aerosol can handling: Do not puncture, crush, or incinerate — even when empty; residual propellant remains pressurised after product is exhausted
Includes extension straw: Yes (thin plastic tube that clips to nozzle)
Recommended spray distance: Approximately 15–20 cm from surface for broad spray
Pre-use instruction: Shake can before use
Eye contact first aid: Flush with clean water for several minutes; seek medical advice if irritation persists
Skin contact first aid: Wash with soap and water; remove contaminated clothing
Ingestion first aid: Do not induce vomiting; rinse mouth, drink water, seek medical advice immediately
Inhalation first aid: Move to fresh air; seek medical advice if symptoms (dizziness, nausea) persist
Recommended PPE — eyes: Safety glasses, particularly when spraying overhead or in confined spaces
Recommended PPE — skin: Nitrile gloves for extended use
Ventilation requirement: Use in well-ventilated areas
Disposal: In accordance with local council regulations; do not dispose of pressurised cans in general waste or expose to heat during disposal
"RP" designation: Stands for Rust Penetrant
Note on specification data: Specification data provided describes the Selleys RP7 Degreaser (Trigger 500mL) — a separate product in the RP7 range; the Degreaser is classified as non-hazardous and non-dangerous goods

General Product Claims

RP7 penetrates rust and corrosion via capillary action through microscopic gaps in corroded surfaces
RP7 breaks down iron oxide (rust) to release seized components
RP7 lubricates moving parts including hinges, chains, cables, and sliding mechanisms
RP7 is hydrophobic and displaces moisture from surfaces
RP7 leaves a residual protective film that resists future corrosion
The lubricant film is light and suited to general maintenance rather than high-load bearing applications
Reapplication during dwell time improves penetration depth and results
Applying heat (where safe) to surrounding metal accelerates penetration by expanding metal and opening corrosion gaps
Tapping a seized fastener after application creates micro-vibrations that drive penetrant deeper into threads
A light wipe on clean metal tool surfaces before storage extends service life in humid environments
Petroleum-based formula may degrade certain plastics and rubber compounds over time — test on inconspicuous area first
Not recommended for use on brake friction surfaces
Suitable for light lubrication of bicycle chains and derailleur pivots
Suitable for outdoor electrical junction boxes, corroded switch contacts, and ignition systems
Suitable for general household, DIY, and trade maintenance use
One of the most trusted products in the Australian trade and DIY market
The aerosol delivery system provides consistent spray pressure from first use to last
The 300g format is appropriate for general household and light trade use

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Selleys RP7 Multi-Purpose Lubricant Spray 300g 07 product guide