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There's Murex and Fibarex that are both common for exterior repairs. Fibarex is reinforced with fibres to provide some resistance to cracking, Murex has a high marble content and can be used on corners unsupported without slumping. Ideally you'd have both and pick which one suits the area best. The decorators supplier I use is an independant and they will sell the individual 1kg bags out of the 5 kilo big bags so it's easier to get what you want without having loads left over.
I wouldn't bother with an exterior corner trowel, you can use 2 trowels to get the same result or use a ply former. You can sort a lot out by sanding on exterior corners anyway.
Touprelith is the grey cement filler, I have used it in the past but Murex took over for some reason.
Airhead-
Amazing. Super helpful as always.
I think I'll go with the Fibarex first as it's a delivery thing for me, then if needed I can swing by Screwfix. I guess I'll grab the 3 piece set and a big float, but leave the external corner one.
Think I'll also grab a 4½ grinder as I've been holding on buying one until the next DIY job comes up. I reckon it'll be faster/easier using one with the brilo pad discs than going at it with a wire brush.
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The guys who did our block renovation used Murex to repair the underside of a masonry cill that had crumbled off. They drove some screws in to give it some purchase before applying but it held amazingly well. They did say it was a bastard to sand though.
hugo7
Sharkstar
I'm repairing our porch overhang thing.
Blasted it with a pressure washer today. Need to have at it with wire brush, then fill with TOUPRET TOUPRELITH F EXTERIOR MASONRY REPAIR FILLER. @Airhead I know you said toupret fibarex(?) but that doesn't seem to come up and this sounds like the same.
Is it worth buying a set of these?
https://www.screwfix.com/p/forge-steel-edging-trowel-set-3-piece-set/5334c
I think I'm going to buy an external corner trowel to increase my odds of a crisp finish. But wondered if these will help. They're not really the sort of thing I want to spend money on or have cluttering up the place if I don't have to.
Cheers.
Edit: I found Toupret Fibarex Quick Set Exterior Filler from https://leylandsdm.co.uk/toupret-masonry-fibarex-masonry-repair-with-fibre-quick-set-5kg.html
Sounds like it may be better for filling the bigger patches. Then if it's too rough I can buy the stuff from Screwfix.