Waterproof, Restore and Heat-Protect Your Shipping Container in a Weekend.

Shipping Container leaking, rusty, or worn out?
Too hot inside in the Aussie sun?
Time to fix it ANYONE CAN DO IT.

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Coverage Reference Guide

Shipping container waterproofing is mostly seam and detail work — not full-surface painting. Use this guide to match your situation to the right quantity.

1 × 4L

Seams, joins & spot rust treatment

Most small shipping containers only need seams, corner joins, and isolated rust spots treated — not the full roof surface. 4L is sufficient for this type of targeted application on the majority of standard containers.

2 × 4L
or 15L

Larger containers or extensive seam & rust work

High-cube containers, 40ft containers, or any container with heavy rust pitting, multiple seam repairs, and full corrosion treatment across the roof will need 8–15L. Use the calculator above to guide your estimate, then round up if in doubt.

Full roof
coverage

Only recommended for severe surface damage

Full-surface coating is only necessary when the roof has extensive rust-through, holes, or widespread surface damage — not routine maintenance. If unsure, start with seam treatment and assess before committing to full coverage.

💡 Why does the calculator show a small amount for a large surface? The calculator estimates material for full coverage. For shipping containers, you're almost always sealing seams and treating rust — not painting the whole roof — so you'll typically need far less than a full-coverage figure suggests.

How Big is Your Container?

Enter your Shipping Containers area, pick a colour and you're done.

Enter Area

m²

Raw metal surface?

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4.9/5 from 1,200+ Aussie DIYers

FREE Shipping with Australia Post

10 year warranty

Easy returns

FREE Shipping with Australia Post

10 year warranty

Easy returns

Order by 11:30 am QLD for same business day dispatch • delivery in 2 to 8 business days

Step 1: Clean and Prepare the Surface

Wash or water-blast the entire container to remove dirt, debris, and any loose or peeling paint.
Use a leaf blower to remove excess water and ensure the surface is completely dry before application.

Step 2: Reinforce Seams, Joins, and Holes

Pre-cut Geo-Textile to fit over all seams, joins, and holes.
Apply a first coat of Liquid Rubber Waterproof Sealant with a brush to these areas.
While the sealant is still wet, embed the Geo-Textile into the sealant, making sure to smooth out air bubbles and wrinkles.
Once positioned, spray Rapid Cure Spray to set the product and speed up drying.

Step 3: Apply Waterproof Sealant to Entire Surface

Once the reinforced areas have dried, apply a first coat of Waterproof Sealant across the entire shipping container using a brush, roller, or spray machine.
If rain is expected, spray Rapid Cure Spray after application to set the product quickly.

Step 4: Apply Sealer/Primer

Once fully cured, wash the surface again to remove any dirt or dust.
If the container was previously painted, apply Sealer before adding the final coating.
If working with raw metal, apply Etch Primer to ensure proper adhesion.

Step 5: Apply the Protective Thermal Coating

Once dry, apply Thermal Coating to protect against UV exposure and improve heat reflection.
Apply 3 coats over Waterproof Sealant or 2 coats minimum over primed metal surfaces.

Full Container (Top+Sides)

Length (l) m

Width (w) m

Height (h) m

Total Area:

- m²

Only Top

Length (l) m

Width (w) m

Total Area:

- m²

Advanced Heat-Reflective Protection

Liquid Rubber thermal coating is engineered for Shipping Containers. Reflects heat, blocks UV rays, reduces inside temperatures, and keeps your Container cooler in every season.

Applying Thermal Coating with Liquid Rubber to reduce heat and protect against sun damage

Reduce heat, save on energy, and extend the life of your Shipping Container.

Reflects up to 90% of infrared heat, for a noticeably cooler Shipping Container interior. Even on the hottest days.
Extends caravan roof lifespan, by protecting against harsh sun, rain, and dust.
Advanced membrane system, for superior insulation and waterproofing.

Liquid Rubber DIY vs. Traditional Roof Sealants

Compare Liquid Rubber DIY with conventional coatings and sealants.

Feature	Traditional Sealants	Liquid Rubber DIY Kit
Waterproofing	Prone to leaks, leaves gaps and cracks.	Fully watertight. Seals your whole surface.
Flexibility & Durability	Cracks or peels in heat and cold.	Remains flexible. Never cracks or peels.
DIY Friendly	Often tricky to use	Brush or roll on. Easy to apply
UV & Weather Proof	Breaks down in sun or heavy rain.	Made for Aussie weather. Lasts for years.
Eco & Cost Effective	Harsh chemicals, needs frequent recoating.	Water-based, non-toxic. Saves money.
Adhesion & Maintenance	Doesn’t stick well, repairs common.	Sticks to any roof. Low maintenance.

Waterproofing

Traditional

Prone to leaks, leaves gaps and cracks.

DIY Kit

Fully watertight. Seals your whole surface.

Flexibility & Durability

Traditional

Cracks or peels in heat and cold.

DIY Kit

Remains flexible. Never cracks or peels.

DIY Friendly

Traditional

Often tricky to use

DIY Kit

Brush or roll on. Easy to apply

UV & Weather Proof

Traditional

Breaks down in sun or heavy rain.

DIY Kit

Made for Aussie weather. Lasts for years.

Eco & Cost Effective

Traditional

Harsh chemicals, needs frequent recoating.

DIY Kit

Water-based, non-toxic. Saves money.

Adhesion & Maintenance

Traditional

Doesn’t stick well, repairs common.

DIY Kit

Sticks to any roof. Low maintenance.

Can I apply Liquid Rubber waterproof sealant over existing coatings or sealants?

For the best waterproofing results, apply Liquid Rubber to a clean and dry surface. Remove old roof coatings, silicone, or loose materials before starting. This ensures maximum adhesion and long-term leak protection.

What tools and equipment do I need to waterproof my Shipping Container?

Applying Liquid Rubber DIY waterproofing is simple. You only need a paintbrush or roller (included in our kits). Basic safety gear such as gloves is recommended, and keep a cleaning agent handy for spills or cleaning your tools.

How many coats of Liquid Rubber or primer should I apply for my Shipping Container waterproofing?

To ensure your Shipping Container stays fully waterproof, apply 2-3 coats of Liquid Rubber sealant directly to the clean and dry surface. Then apply one coat of primer over the rubber and the remaining roof area, followed by 3 coats of thermal coating over the waterproofed area and 2 coats over the remaining roof area for the best UV protection and heat reflection. The product amounts in our kit builder are calculated to be sufficient for up to 3 coats.

What is the recommended curing time for each coating?

Allow the waterproof sealant to cure for 4-12 hours between coats and be fully cured within 72 hours for a strong, weatherproof bond. The primer cures in 2-4 hours before the thermal coating can be applied. For the thermal coating, wait 6-12 hours between coats. When in doubt, 1 coat a day keeps problems away.

Can I apply Liquid Rubber waterproofing in different weather conditions?

For best results, apply Liquid Rubber when the weather is dry and mild. Avoid application if rain, dew, or strong wind is expected within 24 hours. This helps your new house boat roof coating cure properly and prevents moisture from interfering with adhesion.

How long does shipping take for Liquid Rubber DIY kits in Australia?

We offer fast shipping Australia-wide. Orders typically arrive within 3 to 8 business days. Local pickup is also available at 1 Conway Court, Nerang, Gold Coast, QLD 4211.

What colour is the Waterproof Sealant?

The Waterproof Sealant appears brown when wet but turns black when fully cured. If you want a coloured finish, we recommend applying a primer on top of the cured sealant, followed by a top coat in your chosen colour. This approach ensures both waterproofing protection and creates enhanced UV resistance and provides longevity.

DOCUMENTATION & MAINTENANCE

Shipping Container Maintenance Tips for Thermal Coating

Keep your Shipping Container protected and maximise the lifespan of your Liquid Rubber thermal coating with these essential maintenance tips.

Inspect your Shipping Container regularly:
Check your Shipping Container every year for any signs of damage, wear, or peeling coating. Early detection helps prevent leaks and prolongs waterproofing.

Reapply Liquid Rubber thermal coating:
For the best long-term performance, add a fresh layer of thermal coating every few years. This keeps your Shipping Container fully protected against heat and weather.

Clean gently with pH-neutral detergent:
Wash your Shipping Container with a mild, pH-neutral soap and a soft broom or sponge. This removes dirt and debris without damaging the protective coating or reducing its heat-reflective properties.