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Plaster to cover holes2/15/2024 Lightweight fillers: non-shrinking, ready-mixed micropolymer fillers (such as Polyfilla One Fill), are very convenient and can be used for medium-size holes, but the finished surface has nothing like the hardness of other fillers, so the finish will not be as fine.Ĭaulk: this is flexible acrylic mastic (such as Painter's Mate), and the best thing to use for filling any gaps that may appear between your skirting board and wall, your doorframe and the wall, or at the edges of shelves that are going to be painted. Plaster will perish after a few months in storage. Some plasters (such as jointing compound) are easy to sand when they dry, so you can achieve a fine finish without having to learn difficult plasterers' techniques. Plaster: very economical, and therefore more suitable for large holes and, of course, entire walls. Unlike plaster, the powder left in the box will still be usable when you find another hole to fill months later. This makes them more suitable for filling deep holes. Powder fillers: these are mixed with water and harden by crystallisation and so set quickly right to the back of the hole. And, when it finally does set, it may crack and end up not completely filling your hole, which is far from ideal. They harden by evaporation and shrink as they dry out, so if you're using it to fill a deep hole it can take an age to set. Ready-mixed fillers: these are, of course, very convenient to use but they do have their limitations.
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