18oz Heavy Duty Cotton Canvas Tarpaulin – Water-Resistant Cover

Trailer, Boat & Vehicle Covers

Covers for trailers, lorries, boats and caravans. Heavy duty polyethylene, PVC with shock cord already fitted, and breathable canvas for storage.

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Heavy duty, waterproof materials

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Three kinds of clear.
One is right for your job.

Light and toughness trade off against each other. Here is how the types compare.

200 to 270gsm Polyethylene

Heavy duty polyethylene

Strength
Lifespan outdoors

Best for: occasional loads and winter storage.

Shop 270gsm

350gsm Polyethylene

Five-layer polyethylene, 16x16 weave

Strength
Lifespan outdoors

Best for: boats and plant left out for months.

Shop 350gsm

560 to 610gsm PVC

PVC-coated polyester

Strength
Lifespan outdoors

Best for: trailers and lorries in daily use.

Shop 560gsm PVC

Cotton Canvas

Breathable canvas, 18oz to 21oz

Strength
Lifespan outdoors

Best for: cars and classic vehicles in storage.

Shop 18oz canvas

Measure in 3 steps

Open the size guide
  1. Measure the area

    Take the length and width of the space or frame you want to cover.

  2. Add your overhang

    Add around 30cm to each side so there is room to tie it down.

  3. Pick the size up

    Finished sizes can run slightly under, so choose the nearest size above.

Trailer, Boat & Vehicle Covers buying guide

Quick answers

What is the best tarpaulin for a trailer?

PVC at 560gsm to 610gsm. It resists rubbing and stays flexible. The 610gsm sheet with shock cord fitted is the quickest to put on and take off.

What weight tarpaulin do I need for a lorry?

Choose PVC-coated polyester at 560gsm or more for loads covered every day. A 270gsm polyethylene sheet works for occasional loads.

Can I use a tarpaulin as a boat cover?

Yes. Use a heavy duty sheet, support it so water cannot pool, and leave a gap for air so damp does not build up underneath.

Should I cover a car with plastic or canvas?

Polyethylene is fully waterproof and suits short spells outside. Canvas breathes, so it is better for long-term storage under some shelter.

How do I stop a trailer cover flapping on the road?

Pull the sheet tight, use every eyelet and tuck in loose edges. Shock cord keeps tension on the sheet as the load settles.