PRIMEPATIO Outdoor Bench Cushion (8cm memory foam) with waterproof cover and ties, black

If you’re after a thicker outdoor cushion that feels supportive rather than “flat”, this PRIMEPATIO bench cushion is built around memory foam comfort and a waterproof, UV-treated cover. It’s aimed at everyday lounging on patios, decks, porches and even window seats, with the practical added detail of side ties to help it stay put.

Key features

This cushion is described as thick and comfortable, using memory foam with an 8cm thickness. Over time, memory foam can be a bit of a gamble outdoors depending on how it’s stored and dried out, but the brand notes an “easy recovery” feel—so on paper it’s designed to return towards its original shape after sitting for a long time.

The outer cover uses a high density polyester fabric with a waterproof PU coating. The idea is simple: help prevent splashes and moisture from reaching the foam. It also mentions UV and waterproof treatment, with a claim of “won’t fade under direct sunlight for over 500 hours”. That’s the sort of detail you’d look for if your cushion sits in strong daylight a lot.

One more practical bit is the double-layer stitched edges and the adjustable ties. The ties are on each side, so you can position the cushion more precisely and reduce the “sliding around” that often happens on benches and swing-style seating.

What matters most in day-to-day use

The 8cm thickness is the headline if you want more than a thin replacement pad. A thicker cushion generally makes a noticeable difference when you’re sitting for longer stretches—think porch swings, garden benches, or a window seat where comfort is the whole point.

On the weather side, the waterproof cover helps with day-to-day exposure, and the description says it resists stains and helps keep rain out while protecting the foam. Still, there’s a limitation worth noting: they recommend bringing it indoors when it rains or when not in use. That doesn’t make it “indoor-only”, but it does mean you’ll get the best lifespan if you’re prepared to move it.

And yes, black can be a bit more noticeable for dirt or water marks depending on your outdoor setup—nothing unusual, just something to consider if you like things looking spotless.

Waterproof & UV cover: good to know before you buy

The waterproof PU-coated polyester cover is designed to prevent water from splashing and to help protect the memory foam beneath. The UV claim (“over 500 hours” of direct sunlight without fading) is helpful, but in real life fade can also depend on how consistently it’s exposed, how hot your patio gets, and whether it’s sheltered.

If you’re buying for a bench that sits fully uncovered through British summer weather, this cushion makes sense, but don’t treat the cover as a substitute for bringing cushions in during heavy rain. The brand’s own guidance is pretty clear about preservation.

Who it suits (and who should look elsewhere)

It’s a solid match if you want a comfortable replacement for outdoor bench-style seating—especially if you’ve previously tried thinner pads that felt unsupportive. The ties also make it more practical than loose cushions, particularly on porches or swing seats.

It may not be the best fit if you need something that can stay outdoors in wet weather for long periods without bringing it in. The recommendation to store indoors when it rains suggests that, while it’s waterproof for everyday splash protection, it’s not designed for neglect.

Worth considering if you prioritise seating comfort (8cm memory foam) and want the cushion to look more “fitted” on your furniture thanks to the side ties. If your priority is ultra-light, compact storage or you hate the idea of moving cushions, you may want to think twice.

Practical tips for getting more value

• Use the ties to set the cushion where it won’t drift—especially on a porch swing or bench where the seating angle can change slightly.
• If it gets wet, dry it properly before long-term storage (the cover is waterproof, but letting moisture linger isn’t ideal for foam longevity).
• For a quick “micro upgrade” moment: fit it to your window seat or garden bench, adjust the ties so the edges sit neatly, then sit for a while. The whole point here is that thicker, supportive feel from the memory foam.

Buying verdict

It’s a good fit if you’re looking for a thick (8cm) outdoor bench cushion with memory foam comfort, a waterproof PU-coated cover, and tie straps to keep it in place. It suits everyday patio/deck use where you still can bring the cushion indoors during rain.

It might not suit you if you want a cushion that can stay out in heavy rain without moving it. In that case, the guidance to bring it inside when not in use becomes a deal-breaker.

A practical way to decide is to ask yourself how exposed your seating is day-to-day and whether you’re willing to store cushions when weather turns.

Quick FAQ

FAQs

How thick is the cushion? The cushion thickness is stated as 8cm.

Is the cover waterproof? The cover uses high density polyester with a waterproof PU coating, intended to prevent water from splashing.

Will it fade in sunlight? It’s described as UV treated and “won’t fade under direct sunlight for over 500 hours”, though real-life exposure varies.

Does it stay in place? It includes two adjustable ties on each side to help position the cushion and keep it stable.

Can it be left outside all the time? The guidance says to bring it indoors when it rains or when not in use to preserve its lifespan.