Help Centre

We are a small, family-owned manufacturing company in Melbourne. We manufacture the ROCK OFF DIY Brush and hold stock of all the options.  We also stock all the components of our Mounting Kit options.  This means that when you Order your ROCK OFF DIY Brush or Mounting Kit, your goods will be ready for shipping within 1 business day.

UPDATE – WE NOW HAVE A DISTRIBUTOR IN PERTH WA – this is for DIY Caravan Stone Guard BRUSH ONLY orders. There is a showroom in Lansdale, Perth where you can view the ROCK OFF Brush and selected brush sizes are available for purchase.

Click here for all our ROCK OFF Caravan Stone Guard options.

If you are not sure which is the best option for you, please feel free to contact us.  We are not the brush installers but we will do our best to guide you.  This is a DIY installation.

For fitting under a caravan, we believe there are a few options. You will need to have a crossbar running underneath the caravan, or some other point to mount the ROCK OFF.  The cross bar would be running across the width, rather than lengthwise like the caravan ribs.

1. If you have space to mount the ROCK OFF across the whole width, then you could bolt the ROCK OFF straight to the crossbar in 4-5 places.  Drill through the backing above where the tufting is “staple-punched” into the backing – you have around 25-30mm room above the tufting where you can drill and bolt the ROCK OFF.
2. If you are mounting the ROCK OFF only across 2 points, then you will need to give the backing stability using the Stainless Steel Rail Kit, or you can use your own fitting such as an angle bracket or C-channel. That can minimise any vibrations when driving at speed.
3. You can cut the ROCK OFF into pieces and mount them in separate places under the Caravan to protect your suspension, tanks and wiring. Some of our customers have a guard above the gas bottles at the front, but will mount the ROCK OFF behind the A-frame on each side for further protection.

Here is the link to the ROCK OFF information, and also the DIY Brush Only. There are customer images attached to this product that show where the ROCK OFF has been mounted under the caravan.

https://busybee.com.au/help-centre/?cat=rock-off&type=common-questions&search=#Main

https://busybee.com.au/rock-off/

Disclaimer: It is your responsibility to ensure this product is suitable for fitment and use with your intended towbar and vehicle

If the 300 Series is anything like the rear of the 200 series, there is nothing under the vehicle that gives you a possible mounting point.  The Towing Bar is internal to the vehicle, so the U-Bolt Kit cannot be fitted, neither the Side/Frame Rail Kit.  In this instance, the only option might be to mount the Kit using our Hitch Mount Kit.  Customers with an Isuzu D-Max have a similar issue with mounting points off the vehicle.

Our Hitch Mount Kit has a 2” square opening that fits over the tongue of the Tow Hitch, the collar of the bracket is either 65mm or we have an option in a 40mm collar.  To mount this, the vehicle would need to have a Hitch that has an adjustable pin location. Similar to a Haymen Reece-type adjustable tow hitch.  You need enough room on the hitch for the collar to fit over and still be able to get the pin in behind it.  This may also impact your towing set up, so it is important to seek professional advice from your local caravan service centre.

https://busybee.com.au/wp-content/uploads/2025/10/Haymen-Reece-Adjustable-Tow-Hitch.jpg

https://busybee.com.au/wp-content/uploads/2025/10/Hitch-Mount-Kit-diagram.jpg

The brush fits either side of the Hitch Bracket.

Click here for our YouTube video of installation.

The other alternative would be to go with just the DIY Caravan Stone Guard Brush, and arrange for a local fitter to make up brackets to suit the 300 series or D-Max.

Disclaimer: It is your responsibility to ensure this product is suitable for fitment and use with your intended towbar and vehicle

There are a few critical differences between ROCK OFF stone guard for caravans and traditional mud flaps.

• Less drag. ROCK OFF’s brushes are far lighter than mud flaps, allowing greater airflow and creating less drag.
• Absorbs impact. Mudflaps tend to bounce stones off in unpredictable directions, whereas ROCK OFF’s bristles absorb the impact of the rocks, taking the force out of them.

ROCK OFF caravan stone guards is also different from spray suppressants. Spray suppressants are traditionally found on trucks, trailers, and buses. They’re designed to reduce the amount of water picked up by trucks, thereby improving visibility for other road users. ROCK OFF camper trailer stone guard has softer bristles, more flexible backing, and is far stronger than spray suppressants as it was developed to absorb the impact of rocks.

Measure from the top of the Mounting point to the ground, take off 100mm for clearance from the road, and then another 45mm for the backing of the brush.  That will be your bristle length needed.

We generally recommend approx 100-150mm for clearance to the road.  If the vehicle goes over ruts, you do not want your ROCK OFF Caravan Stone Guard Brush to hit the ground, thereby creating it’s own kick up of dust and stones.

MEASURE THREE TIMES BEFORE YOU ORDER.  PLEASE DO NOT EXPECT TO CUT THE BRISTLES, YOU WILL FIND THIS NEAR IMPOSSIBLE!!

If you are unsure of how to fit your ROCK OFF, we recommend you contact your local Caravan Service Centre, 4×4 after market specialist, trailer specialist or engineer/fitter, who could give you some advice as to the best way to fit to your vehicle.  

Not sure which option is best for you?  Please Contact Us and our friendly team will be happy to help.

Your ROCK OFF is made with a heavy duty backing, however plastic does not have a “grain”, so if you are mounting the ROCK OFF from the back of your vehicle, it will need some structural stability.  Mounting the ROCK OFF without this additional structure could mean that, when driving at higher speeds, the ROCK OFF could shudder or vibrate.

We recommend fitting your ROCK OFF to a metal channel or angle bracket. You can drill through the upper part of the backing of the ROCK OFF and bolt it directly to the metal.  Once in a metal bracket, you can fix to the rear of your vehicle where needed.

For areas under your caravan or Motorhome, you can bolt this directly to the chassis where there is already a solid structure. Where you have a towing vehicle behind your caravan or motorhome, you can fix your ROCK OFF in the same way.

If you are not sure, we recommend you seek advice from a Caravan Service Centre or Towing or Trailer specialist.

Busy Bee Brushware manufactures and sells the Rock Off® Caravan Stone Guard Brush. We have a range of Stainless Steel Rails and bracket fittings that may be suitable for your vehicle or caravan.  However it is still a DIY project. Click here for more information.

The backing of our Brush is heavy duty HDPE, however is does not have a grain, which means that it needs some structural support if you are fitting the brush to the back of your vehicle.

If you are not sure, we recommend you contact your local caravan service centre, 4×4 after-market specialist, trailer specialist or engineer/fitter who could give you some advice as to the best way to fit to your vehicle.

Our ROCK OFF® Caravan Stone Guard Brush can be drilled and fixed to an Angle Bracket or a C Channel for mounting behind your vehicle.

The ROCK OFF® Caravan Stone Guard Brush can also be cut into sections and mounted under the caravan as a secondary protection zone for your caravan’s pipework, tanks and suspension.

The standard lengths available are 1200mm, 1500mm, 2000mm, and 2400mm.

When you measure your towing vehicle or caravan or motorhome, we recommend the size of the ROCK OFF Caravan Stone Guard Brush should be no longer than the width of the vehicle. This is to meet the Australian Standards requirements for towing.  You do not want the ROCK OFF Caravan Stone Guard Brush protruding as this will create its own airflow drag, and also increases the risk of you or your family catching yourselves on the edge.

Our ROCK OFF Caravan Stone Guard Brush is made in a 2-row staggered brush pattern to give the brush a dense coverage. If you need to cut the brush length to size, we recommend you mark the place where you need to cut.  Then using pliers, remove the bristle tuft immediately underneath.  That will give you a clear space to cut the backing with a hacksaw or dropsaw.  The bristles are individually “staple-punched” into the backing so pulling out one tuft will not impact any of the other tufts.

We offer standard Brush lengths of 1200mm, 1500mm, 2000mm and 2400mm.

We recommend you choose the next size up and you can cut the backing to the length required.

Our ROCK OFF Towing Brush Strip is made in a 2-row staggered brush pattern to give the brush a dense coverage. If you need to cut the brush length to size, we recommend you mark the place where you need to cut.  Then using pliers, remove the bristle tuft immediately underneath.  That will give you a clear space to cut the backing with a hacksaw or dropsaw.

When measuring the trim length that you need, when we refer to Brush trim, that is the exact length of the bristle. You will need to add the length of the backing (45mm) to that measurement when considering overall length. Our customer feedback is that the brush is most effective when mounted with anywhere from 100mm to 150mm clearance from the road. Click here for more information.

Minimum clearance is required so that the brush does not hit the ground and create its own stone kick up.

Remember:
This is a plastic bristle brush, so needs to be mounted away from the exhaust pipe. Both the heat of the exhaust pipe and the hot fumes that come from it can distort the bristles.

Convert to side pipes if you can, or contact us to discuss your exhaust placement.

ROCK OFF® is lighter, creates less drag and allows greater airflow than traditional solid mudflaps.

Our customers have also found that when a stone hits a solid mudflap it can bounce off, while the ROCK OFF® bristles absorb the impact of the stone and takes the energy out of the bouncing stones and rocks.  Means less risk to you, less risk to other drivers and less impact on the environment.

Helps to prevent damage to the front of your camper trailer of caravan, can also be fitted under your caravan to help protect your tanks, pipework and suspension.

We offer standard Brush lengths of 1200mm, 1500mm, 2000mm and 2400mm.

We recommend you choose the next size up and you can cut the backing to the length required.

Our ROCK OFF Towing Brush Strip is made in a 2-row staggered brush pattern to give the brush a dense coverage. If you need to cut the brush length to size, we recommend you mark the place where you need to cut.  Then using pliers, remove the bristle tuft immediately underneath.  That will give you a clear space to cut the backing with a hacksaw or dropsaw.

We do not recommend trying to trim the bristle yourself. The Polypropylene bristle is dense and it is difficult to cut the bristle into an even line.   We have bristle lengths from 150mm in increments up to 400mm maximum.

This is a plastic bristle brush, so do not try to trim the brush with an angle grinder as this will distort the bristle.  If you do need a different bristle length, contact us to discuss a quote for custom cutting.

Measure twice, three times!  Recheck that you have allowed for 100mm clearance from the road, allow for the 45mm backing, and allow for any weight distribution when the caravan/trailer has been hooked up.

Click here to learn more.

While looking similar, ROCK OFF and truck spray suppressant are different products with different purposes (although we do sell both – Click here for truck spray suppressant brush.

Truck and bus spray suppressants are designed to reduce the amount of water picked up by trucks and improve visibility for other road users. It has softer bristles and a flexible backing to fit around truck wheels.

Regular Spray Suppressants have a backing of 9mm, whereas our
ROCK OFF® Caravan Stone Guard Brush is a strong HDPE backing measuring 45mm high by 25mm thick.  This allows for the thicker fibre and double the bristle of a conventional spray suppressant.

Beware of cheap imitations.  Our ROCK OFF Caravan Stone Guard Brush is specifically designed to deflect stones.  It is a lot stronger than spray suppressants which are designed for water, not the rigours of off-road driving.

ROCK OFF® Caravan Stone Guard Brush is made with crimped anti-static polypropylene fibre, punched into a HDPE (High Density Polyethylene) backing.  Our backing has holes drilled into it and our semi automatic machines “staple punch” the tufting bristles securely into the backing.

We source all our materials from local suppliers and the brush is made at our factory in Dandenong South, Melbourne.  Where possible, we source recycled HDPE for our backing.

We are proud to have our ROCK OFF Caravan Stone Guard Brush licenced with the Australian Made Campaign.

This item is longer than 100cm, and classed as Oversize freight. This product cannot be shipped by Australia Post.  We ship these items via Courier (usually StarTrack or TNT) and we offer a FLAT RATE Freight amount of $89.95 inc GST for most postcodes in Australia (some remote postcode exclusions apply).

Please enter your postcode and suburb at checkout and all freight options will be shown. Here are a few tips:

• If the option of Flat Rate Freight or Oversize Freight appears, then tick this if it is the cheaper option.
• If you use your own freight company, tick the box for Click and Collect and one of our team will contact you with the freight dimensions to facilitate your own booking.
• If there is no $89.95 (inc GST) option, please contact us for assistance.  We can check on other freight options that might be available, or we can check the packaging dimensions to ensure it is correct and you are receiving the right freight calculation. Sometimes we can obtain better freight options by having the goods delivered to a business location near you for collection.
• For regional areas, if your local arrangements are to pick up from the post office or local freight depot, please fill in your actual shipping address first and then specify your arrangements in the comment section when you are finalising your purchase.  There is a comment box in the checkout section so you can add any delivery details that will assist to get your freight to you efficiently.

For smaller bristle ROCK OFF brushes:

To protect the bristles, the ROCK OFF Caravan Stone Guard Brush is packed between heavy duty cardboard and placed into a heavy duty plastic sleeve. This ensures your brush can handle the normal rigours of road transport.

For longer bristle ROCK OFF brushes:

Your ROCK OFF brush is packed in heavy duty cardboard carton.

Please dispose of your packaging thoughtfully.  Re-Use, Recycle, Upcycle.

We manufacture this product at our factory in Dandenong South, Melbourne.  Generally we hold stock of each of the combinations of Brush Length and Bristle Trim.  If we have run out of stock of the item you have purchased, we can generally manufacture your ROCK OFF within a business day.

For some of the more popular sizes, there may be a delay of 2-3 business days for production.  We will contact you directly to provide you with an estimate.  This product is mainly shipped via StarTrack or  TNT or we use a local courier where possible for Victoria.   We will email you with tracking details as soon as the goods are booked for shipping.

When you choose the size of your ROCK OFF Caravan Stone Guard Brush, you can obtain an estimate of freight to your suburb.  We also offer FLAT RATE Freight in the shopping cart of $89.95 inc GST throughout most of Australia (some remote postcode exclusions apply).

As a rough guide:

• Sydney  2-3 business days
• Adelaide 3-4 business days
• Perth 5-7 business days
• Darwin 7-10 business days
• Brisbane 4-5 business days
• Hobart 7-10 business days
• Melbourne 1-2 business days

For regional areas, you will need to add 3-4 business days on top of these estimates. (Subject to change and delays/disruptions which are outside of our control). We regularly check on our freight deliveries to ensure your goods get to you in a timely manner. If you need assistance, please contact us.

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Curious to hear your thoughts on what I might be able to do with a busy bee solution for my caravan. I have a stone stomper between tow vehicle and van. Running a 2023 JB Gator X. I’ve attached some photos of where it might go, on the cross beam of chassis, perhaps with some U-bolts attached in-between red markers and then jutting out into the area in green. Your thoughts/ questions to see if we can make something work?

Installing our ROCK OFF Caravan Stone Guard is still very much a DIY proposition.  It will be up to you as to how you make the brush work for you.  From your images, it looks like a U-Bolt Kit might work for you.  You would need to source your U-Bolts, and there looks like there will still be a gap above the brush and under the crossbeam that you might need to consider.

https://busybee.com.au/wp-content/uploads/2025/10/Under-Caravan-image.jpg

However, fitting the U-Bolt the way you have indicated says you are on the right track.  You might be able to fit a length of rubber to the U-Bolt Rails and sit upwards to cover the gap??

Some of our customers have also used the Side/Frame Rail Kit under their caravan, but you would then be needing to fit something to the chassis.  The U-Bolt Kit allows you to fit the brush without impacting the chassis.

https://busybee.com.au/product/rock-off-brush-stone-guard-stainless-u-bolt-kit/

Disclaimer: It is your responsibility to ensure this product is suitable for fitment and use with your intended towbar and vehicle