AllCoat ExteriorZinsser paint review

Why it happens. The fast recoat and the short open time are the same property. Decorators independently report brush marks and tramlines on hot days and sunny south walls, a stringy drag under the brush, and paint thickening in the kettle mid-job in summer. One says the dry rate is sometimes too quick even when temperatures are mild. Brushed onto a sun-heated wall in July it flashes off before it levels.

The fix. Keep Floetrol on the van from May to September, or Penetrol and Owatrol in the solvent version. Work small sections, lay off once, and do not go back over what you have just brushed. Paint sun-heated metal early in the morning, not at two in the afternoon. If you can spray the job instead, spray it — the brush-mark problem goes away completely.

Why it happens. This is where the repeat failures cluster, and it is the surface the paint promises most. A buyer who took the paint-straight-over-gloss line literally watched 5L of gloss white peel off the next day. An exterior plywood job in a sheltered spot flaked at three months, was sanded back and recoated, and failed the same way again. Garage doors that were sanded, degreased and given Peelstop still cracked and flaked a few months on.

The fix. Prime the slick stuff anyway. The Screwfix posters still happy two years on ran two coats of Zinsser 123 under two coats of AllCoat satin on metal. That is a few dollars against a redo. Clean and degrease first either way, and test a small panel on any hard, flat, high-wear surface before you commit a whole elevation to the self-priming claim.

Why it happens. Pale colors over a dark or patchy base do not hide in one pass. The UK forums are full of people surprised that white took three coats, and decorators say the same thing outright — white lacks opacity while the dark shades simply perform better. On an import you are paying $65–90 a gallon-equivalent for, a surprise third coat is real money and real lead time.

The fix. Budget two coats minimum on white and often three, and order the paint accordingly before it ships. If the color choice is open, take the job in a dark shade — anthracite and black over white or brown UPVC is where this paint is happiest and where owners report no fade at two years. If you must go pale over a dark base, an opaque primer coat underneath saves you a topcoat.

Why it happens. Self-priming is a convenience claim, not a fix for a bad surface. It holds on sound previously-painted gloss, clean sound timber, clean sound metal that is not actively rusting, and stable masonry. It does not hold on bare ferrous metal that is flash-rusting, on chalking or powdery old masonry, or on tannin-rich woods like cedar, oak and redwood that bleed brown through a water-based topcoat.

The fix. Match the primer to the problem. Rust-inhibiting primer on bare ferrous metal, a binding primer on chalky render so the topcoat does not lift with the chalk, and a stain-blocking primer under cedar, oak and redwood. Zinsser makes primers for exactly these three problems, so this is not an expensive detour. Skip them and you get rust ghosting or tannin stains inside a season.

Why it happens. It weathers better than it takes knocks. Windows chipped within a month at four coats. A bed frame at three coats was badly chipped after three weeks of use. Pros keep it for soffits, gates and frames and reach for a 2K product on anything under physical stress. On sun-blasted UPVC they report the film breaking down at roughly five to seven years, not the fifteen on the tin.

The fix. Pick the surfaces to match the film. Soffits, fascia, gates, frames, rainwater goods and cladding are the right jobs. Handles, latch edges, furniture and anything that gets kicked or slammed are not — use a 2K product there. Where you do paint high-touch trim, respect the 7-day cure before it goes back into service, and expect a touch-up cycle on the south and west faces sooner than the north.

Only for a mixed-material job. It is a US specialty import at $65–90 a gallon-equivalent, and what you buy is one can that covers timber, metal, masonry and plastic instead of three separate paints. It is at its best in a dark shade over tired UPVC and metal, sprayed rather than brushed. For a plain wood or fiber-cement house, a US-stocked exterior paint does the same work for less money and no import wait.

Close to it. The same can goes on wood, metal, masonry, plastic and UPVC, which is the whole pitch. The catch is prep. Bare rusty steel and chalky old render still want the right primer first. On sound, clean surfaces the self-priming claim holds. On problem substrates it does not, and that is true of every multi-surface paint, not just this one.

On sound wood, sound metal, sound masonry and clean gloss, no. It bites without sanding and that is its best trick. On bare ferrous metal, chalking masonry, tannin-heavy timber like cedar, or anything releasing underneath, prime first. Self-priming is a convenience claim, not a fix for a bad surface.

Not easily. AllCoat is a UK and Europe product. In the States it shows up through specialty importers and resale listings, usually $65–90 for a gallon-equivalent, often more after shipping. Home Depot and Lowes carry other Zinsser products but not this one. Budget for import friction and lead time.

Different jobs. AllCoat is a multi-surface paint that does timber, metal and plastic from one can. SuperPaint and Behr Premium are wall and trim siding paints, cheaper per gallon and far easier to buy here. If you are painting a whole house exterior, buy the US paint. If you need one paint for a mixed metal-and-timber railing-and-cladding job, AllCoat earns the import.

Zinsser claims up to 15 years and resistance to cracking, blistering and flaking, backed by a flexible film. Fifteen is the lab number on ideal substrates. In real weather, expect strong color hold and gloss for the first several years and a touch-up cycle on the south and west faces sooner than the north. On sun-blasted UPVC pros report the film breaking down at roughly five to seven years, and prep decides the back half of that number either way.

Spray it if you can. Pros who put it through a gun say the same thing unprompted — good opacity, good adhesion, a dream to spray — and it is the route to an oil-gloss look on doors, railings, gutters and shopfronts. Brushed, the short open time works against you on a warm day and hands you tramlines. Thin roughly 10 to 20 percent for spraying, and test a panel first because nobody agrees on an exact ratio.

Slick old gloss is where the early failures cluster, not the rusty steel and chalky render the label already warns about. One buyer took the paint-straight-over-gloss line literally and watched 5L of gloss white peel off the next day. An exterior plywood job flaked at three months, was sanded back and recoated, and failed the same way again. Clean and degrease, then prime the slick stuff anyway — two coats of Zinsser 123 under two coats of AllCoat satin is the combination that was still holding at two years.

Two at minimum, and often three. Pale colors over a dark or patchy base do not hide in one pass, and the UK forums are full of people surprised by the third coat. Decorators put it plainly — white lacks opacity and the dark shades are the stronger product. Order the extra paint before it ships, because you cannot top up locally.

A soft natural-bristle brush suits the consistency better than a cheap synthetic. For rolling, use a woven sleeve, not foam — foam swells and loses its shape in this paint. Work small sections, lay off once, and do not go back into what you have just brushed. From May to September keep Floetrol on the van, or Penetrol and Owatrol if you are using the solvent-based version.