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Take advantage of our wide choice of expanding foam filler to insulate and sound proof windows and walls. Made from quick setting polyurethane, expanding foam can be cut, plastered, sawn and sealed while adhering to most materials. From fixing broken framework to filling in irregular gaps, choose from hand applied expanding foam insulation or gun-applied. We also stock expanding foam guns to give you greater control and precision when applying the foam. Found everything you need? Either buy now or add to a quote list if you’re buying in bulk – you may be entitled to a discount. For all your building supply needs, shop the Huws Gray range now.