Washing a PVC banner without scrubbing the print off it

Washing a PVC banner needs nothing fancier than a bucket of lukewarm water, a squirt of ordinary washing-up liquid and a soft sponge. Lay the banner flat, wipe it gently, rinse it with clean water and let both sides dry before you roll it. The mistakes that ruin banners are the clever ones: solvent sprays, scouring pads and the pressure washer from the shed. Skip those and the print survives for years.

Why the print comes off (and how to stop it) #

The ink on a banner sits on the surface of the material. It is tough enough for rain and sun, but it is still a thin layer, and three things wear it away fast:

• Solvents. White spirit, thinners, acetone, bleach and many household sprays soften or dissolve ink. You’ll see colour on the cloth within seconds.
• Abrasion. Scouring pads, cream cleaners and stiff brushes scratch the print, leaving dull patches that never shine again.
• Pressure. A jet washer can lift ink at the edges and blast water into the hems, where it sits and breeds mould.

So the whole method is about letting water and mild soap loosen the dirt, then carrying it away without friction. Our PVC banners are 440gsm PVC and our PVC-free banners are a 400gsm material. Treat them exactly the same.

The kit: what goes in the bucket, what stays in the cupboard #

Use	Leave out
Lukewarm water with a few drops of washing-up liquid	White spirit, thinners, acetone, bleach
Soft sponge or microfibre cloth	Scouring pads and cream cleaners
Soft brush for textured grime	Stiff yard brushes
Hose on a gentle setting, or a second bucket of clean water	Pressure washers
Old towels and a clean, smooth patch of floor or patio	Gravel or grit underneath the banner

Washing a PVC banner, start to finish #

Allow about half an hour for a typical 6 ft × 3 ft (1829 × 914 mm) banner, most of which is waiting for it to dry.

1. Get it down first. A banner cleaned while tied to a railing drips grubby water behind the ties and you end up scrubbing at an angle. Flat on the ground is gentler and quicker.
2. Dry-brush the loose stuff. Sweep away leaves, dust and dried mud with a soft brush or dry cloth. Grit left on the surface turns your sponge into sandpaper.
3. Try a hidden corner. Wipe a small patch near a hem with the soapy water and look at the cloth. Any colour on it means stop and switch to plain water.
4. Wash a section at a time. Work across the banner in patches about an arm’s length wide, using light circles. Let the soap do the lifting rather than your elbow.
5. Rinse each patch clean. Soap left behind dries to a film that grabs fresh dirt, so rinse until the water runs clear.
6. Flip it and do the back. Grime on the back rubs onto the printed face the moment you roll the banner up.
7. Dry it properly. Pat off the worst with towels, then leave it flat or hung in shade until the face, back and hems are all dry. Roll it with the print facing out.

Stain by stain #

Bird droppings and tree sap

Lay a wet cloth over the mark for a few minutes to soften it, then wipe it away. Resist picking at it with a fingernail or a blade; that takes the ink with it.

Grey streaks from passing traffic

Road film comes off in layers. Two or three gentle washes beat one aggressive scrub every time.

Black spots after damp storage

Mild soapy water, then a long dry in fresh air. If the mould has already stained the print, some shadow may stay.

Paint, marker pen and graffiti

These usually need a solvent strong enough to damage the print as well. Test anything on a hidden corner first, and be ready to accept that a new banner is the better fix.

Dents and scuffs around the eyelets #

Cable ties pulled very tight can scuff the print or dent the PVC around each eyelet. The scuffs usually wash off with the rest of the dirt. Dents and light creases tend to relax if the banner lies flat in a warm room for a day or two. Never iron PVC or point a heat gun at it; direct heat melts and warps it. Next time, spread the tension more evenly using the tips in hanging a banner.

Other materials: small changes to the same routine #

Once you have the hang of washing a PVC banner, the rest of your signage follows the same logic.

• Mesh banners (260gsm). Same soapy water, but a soft brush gets into the open weave better than a sponge. A gentle hose shifts the mud that splashes up the bottom of site fencing.
• Foamex boards. A soft, damp cloth only. The surface marks easily; boards ordered with a gloss or matt laminate put up with wiping much better.
• Dibond signs. Soft cloth and soapy water. The aluminium composite is hard wearing, but the print on top still scratches under anything abrasive.
• Correx boards. Sponge and soapy water. Try to keep water out of the open flutes along the edges, and let boards dry before you stack them.
• Flags. Follow the care label if there is one. If not, hand wash in cool water with a mild detergent and hang to dry. No tumble dryer, no iron on the print.

Less cleaning, not better cleaning #

The easiest way to keep washing a PVC banner to a ten-minute job is to stop the grime building up. A quick wipe after each event, and again before it goes away, keeps it fresh. Hang outdoor banners high enough that rain doesn’t splash mud up the bottom edge, and away from trees that drip sap all summer. Put it away clean and bone dry, rolled not folded; storing PVC banners covers the rest.

If you reach for anything stronger than washing-up liquid, read its label and use it with care. The HSE sets out the basics of handling hazardous substances under COSHH.

When it’s time to let it go #

No amount of washing a PVC banner brings back colour that the sun has bleached, fixes a hem that has split at the eyelets, or shifts a deep stain. How long a banner stays sharp depends on sun, wind and how it was fixed. When you replace it, outdoor banners can be ordered with hemmed edges and metal eyelets for a longer life outside. Before the old one goes in the skip, read what to do with an old PVC banner; it may still have a second career as a cover or ground sheet.