Barrettine Peelaway Marine (10kg) Review: heavy-duty antifoul remover that works, but demands patience (and muscle)

I used Barrettine Peelaway Marine 10kg on a 26ft GRP sailing boat that had who-knows-how-many layers of old antifoul. The hull hadn’t been stripped in years, so I wanted something that could take off multiple coats in one go instead of endless scraping. On paper, Peelaway Marine sounded like the right tool: water-based poultice system, apply once, cover with the blanket, then peel everything off. In reality, it does work, but it’s not a magic solution where the paint just falls off by itself.

The first thing you notice is the size and weight. A 10kg tub is heavy, and once you start applying it thick enough, you realise you burn through product pretty fast. The instructions say 1kg covers 2–4m² depending on layers and age of the antifoul. On my boat, with several old layers, I was closer to the lower end of that range, if not slightly worse. So if you’re planning to do a full hull on anything bigger than a small yacht, this 10kg tub might not be enough for a full strip in one hit.

Another big point: this is not a clean job. The product is water-based and not as harsh-smelling as solvent strippers I’ve used before, but you still need full PPE like they say: gloves, coveralls, goggles, and a mask. When you start scraping, the paste and old paint mix into a pretty nasty sludge. The blankets help keep it together, but you still have to handle a lot of mess and think about waste disposal at the yard. So if you expect a neat, quick job, that’s not what this is.

Overall first impression: Peelaway Marine is a serious product for a serious job. It’s not user-friendly in the sense of being quick or light work, but it does what it’s supposed to do if you follow the instructions and accept that you’ll lose a weekend (or more) to it. I’d say it’s decent for what it is, but you really have to respect the process and be ready for a fair amount of effort.

On price, Peelaway Marine sits in that zone where it’s not cheap, but it’s also not outrageous for a specialist marine product. The 10kg tub feels expensive when you first buy it, especially if you’re used to small tins of DIY stripper from a hardware shop. But you have to compare it to the real alternatives for antifoul removal: paying a yard to blast it, spending days dry scraping and sanding, or using multiple tins of other strippers that may not handle several layers at once.

In my case, for a 26ft GRP boat with a thick build-up, I’d say the value is okay but not stellar. It saved me a lot of physical punishment compared to fully dry scraping, and it reduced dust significantly, which is a big plus in terms of health and yard rules. On the flip side, I used a large chunk of the tub and still had to do some manual follow-up work. So it’s not like I paid once and the job was magically done. I basically paid to make a horrible job just about manageable.

If your hull only has a couple of light coats or you’re already planning to get the yard to soda blast or similar, this might not be the best value. In those cases, a simpler method or professional blasting might be more cost-effective. But if you’re in a situation where blasting isn’t allowed, you want to avoid heavy sanding, or you’re working somewhere without easy access to pro services, Peelaway Marine starts to make more sense financially.

So, value-wise: good for serious DIYers facing a lot of old paint, less convincing if you only have a light job or can outsource the messy part. It’s not a bargain, but it’s also not a rip-off when you consider how tough antifoul removal can be. Just be realistic: budget for enough product, factor in your time, and accept that this is more about making the job doable than turning it into an easy afternoon task.

The design concept is straightforward: a thick, water-based paste that stays active under a poultice blanket and softens multiple layers of antifoul so you can peel most of it off in one go. Compared to just dry scraping, the idea is to reduce dust and effort. In practice, it does cut down on airborne dust, which is a big plus in a boatyard, but it doesn’t remove the need for scraping or some elbow grease. You’re still sliding a scraper under a heavy, soggy layer of paint and paste.

Applying it is actually the easiest part. The paste has a good consistency for vertical surfaces, so it doesn’t slump off if you put it on thick enough. I used a wide spatula/trowel for most of the hull and a brush for tight areas around the keel and fittings. The design allows for airless spraying, but realistically, for a one-off DIY job, most people will just trowel it on. Once you’ve applied a decent layer, you press the blanket on, smooth it out, and that’s it until the dwell time is up.

The tricky bit with the design is judging thickness and dwell time. The coverage estimate (1kg for 2–4m²) is pretty vague when you’re staring at years of unknown paint. On my test patch, I had to go thicker than I expected to get through multiple layers. That means more product used and longer scraping sessions. The product doesn’t give you much visual feedback while it’s working; you just have to trust the clock and your test patch. If you go too thin, you peel back the blanket and discover half-softened paint that still clings on. Then you’re reapplying and losing time.

Overall, the design is functional: poultice system, blankets, no crazy tools required. But don’t confuse “smart design” with “easy job”. The product reduces some of the worst parts of traditional sanding and scraping, yet you’re still going to be under the boat, dragging a scraper, and hauling bags of wet waste. From a design angle, I’d say they’ve balanced effectiveness and practicality fairly well, but it’s still very much a pro-style system that expects you to plan and commit a solid chunk of time.

The packaging is basically a big plastic tub with a handle and a fairly tight lid. It’s simple and does the job of keeping a heavy, wet product contained. At around 11kg total weight, though, it’s not something you casually swing around under a boat. Carrying it from car to cradle is fine, but once you’re working in cramped spaces, the size and weight get annoying. I quickly switched to scooping smaller amounts into a paint tray or bucket so I wasn’t dragging the whole tub under the hull.

The lid seals well, which is important for a water-based product. I didn’t have leaks in the car or while moving it around. Opening and closing it is a bit of a two-hand job, especially when you’re wearing gloves. Not a big problem, just slightly clumsy. The label is clear with safety icons, usage instructions, and coverage info. It looks more like a trade product than a fancy retail item, which is fine for this kind of thing.

The included blankets come folded inside. They’re not individually wrapped or anything, just stacked. That’s okay, but once you’ve got paste on your gloves and you’re trying to pull out just one or two sheets, it can get messy fast. I ended up taking them all out at the start, cutting them to rough sizes, and stacking them in a clean area so I wasn’t digging around in the tub with dirty hands later on.

In terms of environmental or waste considerations, the packaging is basic plastic, and by the time you’re done, it’ll probably be smeared with product and not easy to reuse for anything clean. You could repurpose it for yard tools or as a mixing bucket, but realistically, many people will just bin it once empty. Overall, I’d call the packaging functional but a bit clunky. It keeps the product safe and usable, but it’s not designed with user comfort or ergonomics in mind beyond the bare minimum.

When I talk about durability here, I mean how the product holds up during a long job and whether it stays consistent from the first application to the last. A 10kg tub is a lot of paste, and on a cool, dry day in the yard, it stayed usable for the whole session. The paste doesn’t skin over quickly in the tub as long as you keep the lid on between refills. I opened and closed it multiple times during the day and didn’t notice any change in texture or performance.

On the hull, the durability of the active phase is mainly down to the poultice system. Once you’ve got the blanket pressed on properly, it keeps the paste moist and working for hours. I didn’t see any dry patches when I peeled the blankets off, even on the sun-facing side of the boat. That’s one of the main strengths of this system versus just slapping on a generic stripper and hoping it doesn’t dry out in the wind. The product does what it claims here: it stays active instead of turning into useless crust.

One thing to watch, though: storage conditions. The label says store in a cool, dry area. I wouldn’t leave this in a baking hot shed for months and expect it to behave exactly the same. Mine was fairly fresh and stored properly, so no issues. If you’re only using part of the tub and want to keep the rest for touch-ups later in the season, make sure the lid is firmly on and the rim is clean so it seals. Otherwise, you’ll end up with dry chunks around the edge that are annoying to mix back in.

From a user point of view, I’d say the product’s durability is pretty solid. It doesn’t degrade over the course of a day’s work, and the blankets do their job of keeping it effective on the hull. Just don’t abuse it with bad storage or leave the lid off while you wander around the yard chatting. Treat it like a proper chemical product, and it should last through a full hull job without changing behaviour halfway through.

In real use, the performance depends a lot on how disciplined you are with application and how bad your hull is. On my 26ft boat, working solo, I burned through the better part of the 10kg tub to cover the bulk of the hull below the waterline. I’d say the coverage was closer to 2m² per kg than 4m², because I had to go fairly thick to tackle multiple old coats. If you’ve got a lighter build-up or newer antifoul, you might stretch it further, but I wouldn’t bank on the high end of the estimate.

Time-wise, you’re looking at a full day or two depending on how you split the work. Application took me a few hours, then I left it to dwell per the instructions (check your test patch for ideal time). Stripping it off with a scraper and dealing with the blankets took even longer than I expected. The sludge is heavy and awkward, and you have to keep your scraper angle shallow to avoid gouging the gelcoat. On GRP, that’s a big one: the product softens the paint, not the hull, but if you get impatient you can still scar the surface with the scraper.

One performance plus: because it’s water-based and covered by blankets, it doesn’t dry out quickly. I didn’t have to panic about rushing back to it within an hour. Even with some wind, the paste under the blanket stayed workable. That’s a real advantage over some older-style strippers that dry into a crust and become useless. On the downside, you end up with a lot of wet waste. The blankets help contain it, but you still need to shovel everything into bags, and it’s heavier than it looks. For a big boat, you’re talking several bags of sticky rubbish to dispose of properly.

Overall performance: it gets the job done, but it’s slow, messy, and product-hungry. It’s not a quick weekend hack; it’s more of a controlled way to tackle a nasty job without covering the yard in toxic dust. If you go in with realistic expectations and plan your time and waste handling, it’s solid. If you’re hoping for some effortless peel-and-done miracle, this will feel underwhelming.

The Barrettine Peelaway Marine 10kg version comes as a big grey tub with a tight-fitting lid. Inside you’ve got the thick paste and, importantly, the special poultice blankets. Those blankets are not just a gimmick; they’re a key part of how this stuff is supposed to work. You slap the paste on, then cover it with the blanket so it stays wet and active for hours instead of drying out. Without the blankets, you’d probably lose a lot of effectiveness, especially outdoors with wind and sun.

The paste itself is a light, creamy consistency, like a dense filler. It’s not runny, which is good for working on hull sides and awkward shapes. It’s grey, so you can actually see where you’ve applied it, especially over old blue or red antifoul. The tub is labelled clearly with all the safety warnings, coverage estimates, and basic instructions. It’s not complicated to understand, but you absolutely need to read everything, especially the bit about doing a test patch. Skipping that step is how you waste time and product.

In use, the presentation is practical enough, but not perfect. The tub is heavy and a bit awkward to move around under a boat on stands. I ended up decanting smaller amounts into a tray so I wasn’t constantly dragging the big tub around in the dust and gravel. The blankets come in folded sheets, so you need to cut them to size. Not a big deal, but you have to factor in the extra faff when you’re trying to work quickly between tides or yard deadlines.

From a plain user point of view, the kit feels complete: you’ve got the paste and the blankets, and that’s the core of the system. You still need your own tools (scrapers, trowel, brush, PPE), and if you’re doing a full hull, plan your work area and where you’ll dump the used blankets and sludge. Nothing in the box feels fancy, but it’s functional. I’d just say it’s more of a professional-style product dropped into a DIY tub, rather than something designed to be super user-friendly out of the box.

This is the part that matters: does Peelaway Marine actually get the antifoul off? On my GRP hull with multiple old layers, yes, it worked, but not perfectly in one pass everywhere. On the flatter mid-hull sections where the paint was reasonably even, I got probably 80–90% of the antifoul off in one application. You slide the scraper under the blanket, and big sheets of softened paint and paste come away together. That’s pretty satisfying and definitely faster than chipping away at dry paint with a scraper alone.

Where it struggled more was on areas with really thick buildup, weird overlaps from previous owners, or places that had been patched with different products over the years. On those spots, the first application softened a lot but left a stubborn underlayer that still clung on. I had to either go for a second Peelaway pass or switch to scraping and a bit of sanding. So the “multiple layers in one go” claim is partly true, but don’t expect miracles if your hull has a long history and a mix of coatings.

The test patch step is genuinely important. I tried a small area first and realised I needed a thicker layer and a reasonably long dwell time to get good results. Once I dialled that in, the effectiveness was decent. If you just slap it on thin and hope, you’ll be disappointed. On the keel and around harder-to-reach corners, I also found it less effective, mainly because it’s harder to keep a consistent thickness and get the blanket pressed on properly.

Compared to just scraping dry or using a heat gun, Peelaway Marine is less physically brutal on large flat areas and creates less dust, but it’s still a serious job. I’d rate the effectiveness as good but not perfect. It gets the job mostly done and saves quite a bit of time versus pure manual scraping, especially on big hull sections. Just be ready to do some follow-up work with scrapers and maybe a light sand to get that last 10–20% of stubborn paint off.