Stabilisers and sealants are used to stabilise the surface of flaking or crumbly walls or plasterwork. Polyvinyl acetate (PVA) without fungicide is relatively problem-free. You can use Polycell Super Bond or Evobond Building Adhesive as a stabiliser and sealant; these are available in DIY stores. You can also use Cuprinol Stabilising Solution, a water-based acrylic solution without fungicide, available to order through the trade or DIY shops.
Paving
Stone slabs, bricks, concrete and gravel used for paving will not cause sensitivity. Take care with tar or asphalt paths and drives; the asphalt can give off persistent fumes, especially in hot weather, and is best avoided if possible.
Putty
Putty is made either of linseed oil and chalk, or of acrylics. Use the linseed oil version for preference. It can irritate the skin, and gives off mild fumes at first but is unlikely to cause reactions over time. Vapours from linseed oil evaporate fast and putty is usually problem-free. Brands of linseed oil and chalk putty include B & Q, available from their stores, and Vallance, from DIY stores. Livos sell a linseed putty by post.
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