You cut a small length, slide it over the joint and heat it up with the side of your soldering iron to shrink it.
"00"Gauge,Paving, 2m of 1 mm Thick Card to cut out,plus 250 Drain coversEtc .
2M Length Of Black Tack For Model Railways, Hornby, Bachmann, Heljan, Dapol, Tac
2M Length Of Black Tack For Model Railway Use, DCC Sound Speaker Fitting. Tac
2M Length Of White Tack For Model Railways, Hornby, Bachmann, Heljan, Dapol, Tac
1m of 1.6mm Heat Shrink For Model Railway, DCC, DCC Sound, Speakers, Led's, Wire