Nettet19. nov. 2024 · Polysulfide sealant produces a flexible sealant on curing. It is ideally suited for use on stone, masonry, and concrete surfaces when used with a special primer. The maximum joint width that it can be used with is 25mm, and it can accept joint movement of 12-25%. It is paintable, and usually available in many colors.
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NettetFoam and caulking will become brittle and crack at some point anyways and you should’t rely on. (I understand in real life ☝️ may be tricky to apply, however this is from the building physics point of view 😊). NettetInsulating foam sealant comes in a pressurized can and is sprayed through a tube into building spaces or gaps. This polyurethane sealant is of two types: high-expansion, designed to fill large holes and gaps by expanding many times its original size, or low-expansion, designed for smaller cracks and expanding up to 25 percent of its original … pdf of social class 11
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