Plysolene PIB is produced from high molecular weight polyisobutylene, modified to achieve optimum properties.
Colour: Black
Types: interleaved with a non woven polypropylene release-coated liner or chalk to ensure easy unwind.
Thicknesses: 0.5 – 1.2 mm
Format: 20 metre Rolls
Solvent Weld: 1 litre and 5 litre tins
Plysolene PIB is semi-resistant to:
Concentrated Nitric Acid, Nitration Acid
Plysolene PIB is NOT resistant to:
Chlorine & Bromine (liquid, gaseous or aqueous)
Plysolene PIB swells in:
Ether, Butyl Acetate, Petrol and Diesel, Animal and Vegetable Fats and Oils (eg. Lard, Butter, Coconut Fat, Linseed, Olive or Whale Oil).
The overlaps are solvent welded by applying Plysolene Welding Agent E with a stiff brush. Other solvents can be used, but greater skill is required to achieve really good welds, hence Plysolene always recommend the use of their specifically formulated welding agent. The solvent should be applied with a circular scrubbing movement to both surfaces so that they become tacky before the overlap is pressed together. The use of too much solvent can cause premature failure as the excess solvent will continue to dissolve the PIB long after the weld has been made.
PIB is a thermoplastic elastomer and does soften with increases in temperature and therefore it should not be used to hold the insulation in place around the pipe. This should be secured in place prior to covering with PIB. For very large ductwork/pipelines, having a diameter in excess of 300mm, use 1.0mm or 1.2mm.
For ventilation ductwork, the sheeting should be fully bonded to the fixed insulation material, which should be high density resin bonded glass-fibre or mineral-wool slab. If expanded polystyrene is used, the edges of the polystyrene should be well taped and all sections should butt up to one another to minimise the effects of movement and to prevent a temperature gradient existing over any gap.
Any air leak leads to a build-up of moist air within the insulation material that becomes wet as the air cools and condensation occurs. Over a period of time this can lead to a complete failure of the lagging. The best solution is to eliminate all air leaks, but if this is not possible, very small ventilation holes in the underside of the ductwork can prevent the build-up of moist air within the insulation.
Plysolene PIB is a flexible thermoplastic elastomeric sheet and will never give a flat rigid appearance. Consequently, the top of any ductwork which is close to horizontal should be built-up to give rain a good run off, and the PIB and insulation material should be well supported to prevent puddling. For very large ductwork and any installation where there are numerous large flat areas, where a flatter finish is required, use either 1.0mm or 1.2mm sheeting.
