The UN number for aerosols - the international classification used for transport and handling of pressurised spray cans. Our high-temperature adhesive sprays carry it, which is why they appear grouped under it. It tells you the products are aerosols, with the handling and shipping rules that implies.

Ultra Adhesive high-temperature multi-purpose contact spray and Trimfix high-temperature adhesive spray glue, both in 500ml aerosols. Both are formulated for bonding carpet, foam, faux leather and trim to metal and board in vehicle interiors.

Because a vehicle interior parked in summer sun reaches temperatures that ordinary spray adhesives simply let go at. The classic failure is a van lining panel that lifts and bubbles after the first hot spell. High-temperature contact adhesive is formulated to hold through that.

Spray both surfaces evenly, let them tack off until touch-dry - usually a few minutes - then bring them together and bond from the centre outwards, working air out as you go. Contact adhesive grabs immediately, so position accurately first time; there is no sliding it into place afterwards.

Coverage depends heavily on the surface - porous board and foam soak up considerably more than smooth metal. Budget generously: a partly-bonded panel that lifts later means stripping and redoing it, which costs far more than another can. For a full van conversion, several cans.

Ventilate well, ideally with the vehicle doors open and a fan running, and wear a suitable mask - solvent vapour builds up quickly in a closed van. Keep away from ignition sources; these are flammable aerosols. Mask anything you do not want overspray on, because it goes everywhere.