Frequently Asked Questions

How can we help?

This page has been designed to answer any questions that you may have about our products. If you still have an unanswered question, please do not hesitate to get in contact with us on 01243 785485 or alternatively, via email on

You can also find some video tutorials in our video gallery. You can access it by clicking the button at the top of this page!


How do I clean my acrylic canvas covers?

The cover should be soaked in lukewarm water (not exceeding 40 degrees).  It should then be scrubbed lightly with a mild soap (no detergents), use Fairy, Lux or a Simple soap.  Flakes are preferable, but you can rub the bar of soap over the canvas.  This can be done on board in situ, on the pontoon, at home on your patio, or in the bath!. Rinse the cover with warm water and leave to dry naturally.  Any windows in the cover may be washed in the same way, using lukewarm water and a mild soap, but do not use abrasives or bleaches. DO NOT PRESSURE WASH. After washing, you may wish to consider re-proofing the canvas. i.e. adding the protective waterproof coating to the top side

How do I re-proof my acrylic canvas covers?

DO NOT RE-PROOF A COVER THAT HAS NOT BEEN CLEANED FIRST. Once your cover has been cleaned and dried to a satisfactory standard, it may need to be re-proofed using Renovo®, Holmenkol®, or Fabsil®. A re-proofer can be painted on with a paintbrush (decant into a glass jar first) or can be sprayed on with an aerosol. Concentrate on the seams and let the proofer spread into the canvas. You can then go in with the brush to work it into the canvas. Try to apply a nice even coating. Leave to dry. Depending on when this was last done, you may have to apply a second thin coating. Keep the re-proofer away from the windows, clean off any spills with a clean, dry cloth. (Our recommendation is that products manufactured from acrylic canvas should be laundered and re-proofed annually.  This process reduces the buildup of salt and dirt abrasives, mildew and “green algae growth”.  We cannot guarantee the removal of mildew and algae from covers that have been neglected over a long period of time). We can offer a laundering service, see here for more details.

What thread do you use when making covers?

Here at C&J Marine the standard thread we generally use, is an anti-wick, U.V. stable, bonded polyester; designed specifically for marine use and colour matched to the marine acrylic canvas. When used with our unique seam binding method, a water resistant seam is achieved. On average the expected thread life in normal use in the UK is approximately 4 to 5 seasons. Lack of improper care and regular maintenance of your covers and canopies will result in a shorter thread life expectancy. As an option, we also offer Tenara® PTFE thread with a 15-year thread warranty. It maintains the strength of the seam even under the harshest outdoor conditions. It does not deteriorate, burst or break, despite years of exposure to weather, extreme temperature or chemicals.

How long will the windows last in my new canopy?

This all depends on a few things. 1, The type of material used. 2, The amount of time the windows are exposed to U.V. light. 3, The strength of the U.V. light. 4, How the windows are maintained during use. Typically, Sprayhood and Cockpit Enclosure windows are lasting approximately 5 seasons in normal UK use. The life expectancy can be less if the windows are not looked after properly, are of inferior quality and/or the vessel is kept in warmer climates. However, the expected life can be increased by upgrading to a different window material, the windows are maintained well during use and/or the windows are protected from U.V. light with canvas covers. In our experience, we find that windows will need replacing at least once in the life of a canopy. It is a relatively straightforward process and relatively inexpensive, but the original windows must be left in place otherwise, the stability of the canopy will be compromised.

What Acrylic Canvas do you use when making covers?

Since 1989 we have been using our preferred choice of Sauleda marine acrylic canvas as we consider it offers our customers exceptional value and quality. We have a unique business relationship with Sauleda and their UK distributor. Our feedback, experiences and ideas are encouraged, and listened to, resulting in a range of acrylic canvas which we believe is ‘Best in Class’. A lot of our customers’ use the term ‘Sunbrella®’ when generally describing acrylic canvas (think vacuum cleaner and hoover), this can sometimes be a bit confusing. However, should the branded Sunbrella® marine canvas interest you for your C&J Marine Bimini, Sprayhood, Cockpit Enclosure, Awning or Upholstery; no problem, please ask when you are talking to one of our team, or visit for more information.

How do I re-fit the Lift-the-Dot fittings into my new Sprayhood?

When we are making replacement Sprayhoods fit onto the original framework (we know these as recovers), we generally do not install the female Lift-the-Dot fittings into the new Sprayhood as there is a slight risk they may not line up correctly with the stud that is fitted into the GRP. To achieve a really nice ‘fit’, it is better to install the female LTD fittings into the canvas when your new Sprayhood has been put back onto the frame and tensioned correctly. We supply one of our own designed cutting tools, with all of the relevant fittings and easy to follow instructions with every recover Sprayhood that is going to be self-fitted.

What glue do I need for Headlining Vinyl?

This is the glue you need.... General Purpose Contact Adhesive is to be used on all hard surfaces and the Marine Tack Aerosol Adhesive is to be used on all fabrics. The General Purpose adhesive covers roughly 5 square meters, the spray adhesive covers roughly half, 2.5 square meters. (This depends on the thickness of application).
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