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Ultimate Cover for Caravan up to 640cm / 21ft

ultimate caravan 21ft van


The Ultimate Cover is made from a marine grade material called Polyguard which is manufactured in the USA. This specific Cover carries a 3 year UV warranty with the material. The fabric can last longer if properly looked after and maintained.


At Coverworld we offer a wide range of protective covers for Caravans, made to order in a Universal design with 2 included zippers.


Ultimate Cover Features and Benefits *


  • Made from 100% Solution Dyed Polyester Canvas
  • Universal Fit with Included Adjustment Tension Panel
  • Very high Tear strength Material
  • Includes 2 installed zippers
  • Fabric is produced with state of the art Mould, Mildew and UV Inhibitors built into the fibres of the material
  • Manufactured using exceptional Quality Components
  • Can be installed by One Person
  • This cover design is a Coverworld Exclusive Cover
  • Cover and Fabric manufactured in the USA



+ Optional Extra Fittings and Features


* Read very detailed notes below about the cover


640cm | 21ft Ultimate Caravan Cover | 3 Year Warranty

640cm | 21ft Ultimate Caravan Cover | 3 Year Warranty

Additional Information

Part # RV-CV21P-HI
Brand Coverworld exclusive Cover
* Exceptional Quality True Loom Woven Fabric with State of the Art UV, Mould, Mildew & Water Inhibitors, Supplied with Heavy duty reinforcement kit
* This cover and the Fabric is made in the USA, the fabric is made by one of the worlds leading textile mills producing fabrics with excellent uv resistance. This cover is suitable for extreme UV conditions and has excellent tear resistance
* All components of highest grade, this is made on a per ft length basis for a better fit
* Heavy Duty Number 10 Zippers which can be into 2 positions on the cover, Includes a matching storage bag and Heavy Duty Reinforcement Kit
* 3 Year Warranty
Material Performance Polyguard®
Shipping Made to Order in USA usually dispatched from Sunshine Coast within 28 days
640cm | 21ft Ultimate Caravan Cover | 3 Year Warranty

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Ultimate Caravan Cover

  • FITS OVERALL LENGTH | 611cm - 640cm (20' 1" - 21')
  • FITS OVERALL WIDTH | up to 250cm
  • FITS HEIGHT | up to 218cm (for full size vans)
  • Includes 2 Zippers * Choose your Own zipper position preference
  • 3 Year Warranty

Do not go up a size specifically to cover a rear spare tyre its better to purchase a separate tyre covers

This cover is manufactured with two included zippers you can choose your preferred zipper position

Do not go up a size specifically to cover a rear spare tyre its better to purchase a separate tyre covers


The Ultimate - Polyguard Fabric weighs 8oz per square yard which is approximately 210gsm per square metre of fabric, see our detailed information about cover weights on the FAQ


If you choose to pay the deposit only today the balance will be payable in full before dispatch which should be paid within 7 days of notification that the cover has been manufactured for you and is ready for dispatch

What are Ultimate Covers made from?

Ultimate Covers are manufactured from a True Loom Woven Polyester which is solution dyed and treated with State of the Art Advanced, UV, Mould and Mildew Inhibitors. * All fabrics require some level of care and maintenance to last above and beyond warranty period of fabric.  Read Care instructions prior to ordering.

The covers in the Ultimate range are made from Solution Dyed Polyester Fabrics. The Ultimate Cover (Polyguard) is an 8oz (per SQ YD) and Ultimate Plus is a 6oz (per SQ YD) fabric weight

Is the Fabric thick and Heavy?

Actually No, the material used to make Ultimate RV covers have a soft feel to it, it is not very heavy or thick.  Its often conceived that thicker fabrics are better, actually when it comes to fabric this is not always the case, in fact some of the thicker caravan covers being sold are the worst type in terms of longevity under the UV.   However even though with the Ultimate and Ultimate Plus are a woven fabric over the entire length of an RV they can still be quite heavy, some estimates on the cover weights are provuded as an estimate.

What Colours are the Ultimate RV Covers.

Ultimate Covers are available in Mist Grey Only

Are Ultimate Covers a 1 piece or 3 piece RV cover?

All ultimate covers are a 1 piece cover, for very large RV's such as Large Motorhomes you may find the cover is heavy.  Our 3 piece zip on SunCover with a 7 Year warranty is the best option for large RV's where the cover weight and size might be an issue for installation.

How many years can the material last?

Its important to understand that though the materials used in the Ultimate Covers range of are of excellent quality, much like owning any object there is a certain level of care that must be undertaken in order for the fabric to reach its maximum lifespan and potential.

The Ultimate / Plus fabric must be properly cared for and maintained.  Though it is manufactured using state of the art mould, mildew and water inhibitors fabric maintenance is require in order to keep these conditions at factory levels.  Fabric that becomes dirty is susceptible to damage caused by potential growth of mould spores on the material surface and as such should be cleaned using our recommended fabric cleaning products.  After the process of cleaning the surface of the material should be treated with Fabric Guard. 

Does water Pooling cause damage to the cover?

yes, it can, its important to see after cover application if any specific areas are becoming heavily weighted with pooled water.  Continual water pooling can over time damage the material so its important to look out for such areas after teh cover is installed and provide a lifting / raised point to adequatley prevent continually pooled water.

Is the material waterproof?

No, but this is a good thing.  A lot of cover suppliers try to market thier covers as waterproof and indeed some covers are but for certain applications such as an RV cover the correct type of material for protection needs to be a water repellent fabric that is designed to repel as much water as possible whilst also allowing the material to breath.  Humidity during hot months can evaporate through the cover and moisture from condensation in colder months also escape through breathable fabrics.

Straps and Securing Method for Ultimate Pop Top and Full size van covers

The Pop Top series covers have a side height of 1800mm, the Full size van covers have a side height of 2180mm. There are straps sewn into the bottom of the cover with side release buckles that secure under and fully around the body of the van.

 Can one person install the cover?

Camper Trailer Covers : Yes

Caravan Covers : Yes but larger sizes can have quite a lot of weight to the overall cover, you may need assistance to lift the cover onto the roof of your RV for installation.   Refer to approximate weights below.

How long does it take to put the cover on?

For Caravans and Motorhomes allowing approximately 30-40 minutes should be sufficient, however you will probably find that your first installation is quite time consuming and you will get faster on subsequent applications.

Standard Features of the Ultimate RV Cover

  • Excellent Quality Material and Construction
  • Caravsn have access to the front, middle and rear doors, Motorhomes have access to the passenger side door to access the motorhome
  • Marine Grade Breathable Fabric to help release any moisture or trapped condensation
  • Adjustable front tension panels
  • Heavy duty Tie Down Straps
  • All Caravan and Motorhome covers include a Heavy Duty Reinforcement Kit to protect stress points such as around aerials and awnings
  • Neutral Grey Colour
  • Heavy duty zippers
  • Storage Bag supplied

How long is the warranty?

We offer a 3 year warranty on all of our USA manufactured Ultimate RV Covers, please read our warranty details.

What can I do to prolong the life of my Ultimate Cover?

  • Avoid letting water or snow stand on the Caravan Cover
  • Always tie down cover securely
  • Pad areas that could snag or tear the cover before installing
  • Treat the fabric with High Tech Fabric Guard
  • Clean the Fabric with our 303 Fabric Cleaner
  • Allow the cover to dry completely before folding for storage
  • Never use the cover when towing your caravan.


Guide to approximate Cover weights for Ultimate and Ultimate Plus Covers in KG's, no allowance made for zipper and straps weight, the list below is an estimate on the cover weight


12/13ft 10 7
14/15ft 11 8
16/17ft 11 9
18/19ft 12 9
20/21ft 13 10
22/23ft 14 10
24/25ft 15 11
26ft 16 12
27ft 17 13
Do you have a question that we have not answered ? Please detail your question below and we will come back to you soon.

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Please put this part number |CV21P-HI| in the Part Number box below.

Download Installation Instructions

Mould and Mildew is not covered by warranty and care should be taken to treat this is if happens to your cover

Cleaning and Care Instructions

All Ultimate caravan covers are rolled and packaged with the front end of the cover to the outside.  The tag on the front end is sewn to the outside of the cover for easy identification.

Your Ultimate Caravan cover will provide you with years of service if you take precautions of examining your cover for sharp areas that could tear the cover such as mirrors, awnings, mounts etc.  Taking a few moments to pad these areas before installing the cover will extend the life of the cover. A heavy duty reinforcement kit is provided with each Caravan Cover.

Install the cover as follows:

  • Place the rolled cover on the front end of the roof
  • Roll the cover to back end of the roof
  • Working from front to back, spread the cover to the side edges of the roof
  • From the ground use a stepladder and work front front to back to pull the cover down over the sides of the caravan, adjust to fit as necessary
  • Before securing the elasticized hems you may wish to use the included reinforcement / repair kit to add protection to the stress areas
  • Secure the elasticized hems under the front and rear end of the caravan and connect each strap to the quick release buckle on the opposite side of the cover. All covers also have an adjustable strap system attached to the front of the until to provide a more secure fit
  • Covers also have 45cm / 18" straps attached to at the bottom of each side to make the cover more secure. Connect each strap to the quick release buckle above it and adjust it
  • The top of the door panel contains hook and loop fastener tape so that the door panel can be rolled up and secured when not in use


Please note your Caravan Cover is for Storage only. Do not attempt to travel with the cover installed or partially on. Also contact with hot surfaces such as exhaust systems will damage the cover fabric


Always take care when installing the cover, particularly when standing on the step ladder for installation, walking on the cover may cause you to slip. If possible installing with two people is reccomended


The cover can be cleaned by using a solution of mild soap and water with a soft brush, or by using our fabric cleaning products. Cover must be completely dry before being folded away for storage.


In order to achieve the maximum lifespan from the cover material some level of care and maintenance is required. This information to all types of covers used for protective purposes. The material used to make the ultimate covers is a solution dyed material that is treated with state of the ART mould, mildew and uv inhibitors but these do require some maintenance. If a cover material becomes dirty then mould spores can latch onto the dirty surface on top of the material and they can grow on the dirt which can eventually cause damage to the material. In order to prevent this from happening you should inspect the cover from time to time and when required clean the cover surface of any dirt to prevent there from being a place that the mould can grow. After cleaning the material, we recommend using one our 303 cleaning products the material should be then be treated after cleaning with fabric guard. 303 products will not damage the material and following these care instructions will ensure your cover lasts above and beyond its warranty period and for the longest lifespan.

Download Installation Instructions

Mould and Mildew is not covered by warranty and care should be taken to treat this is if happens to your cover

Cleaning and Care Instructions

Please view our Standard Coverworld Terms before ordering.

Open Coverworld Terms Here

There is a lot of information on our Terms page, please read them and feel free to ask any questions, we have friendly sales staff ready to take your call or send us an email

Please view our Ultimate RV Cover Warranty details before ordering.

Open Warranty Information Here

  • Payment in Full Ultimate Full Size van 21ft
  • 50% Deposit Ultimate Cover Full Size van 21ft
  • 303 Multi Surface | Fabric, Vinyl, Rubber, Latex Cleaner
  • 30305M  303 AEROSPACE PROTECTANT 16OZ / 473ML (Anti Static and UV Protection)
  • 303 AEROSPACE PROTECTANT 1 Gallon / 3790ML (Anti Static and UV Protection)
  • Not Required
  • Yes

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