With over 30 years experience extruding Polyisobutylene, PLYSOLENE-PIB is an ideal waterproofing membrane for pipework and ventilation ductwork. PLYSOLENE-PIB has outstanding physical properties at low temperature to below -30°C and is easy to cut and solvent-weld on site where difficult shapes are required. This material is ideal for oil refineries, chemical works and power stations.
We produce PLYSOLENE-PIB from high molecular weight polyisobutylene, and modify it 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).
Apply Plysolene Welding Agent E with a stiff brush to solvent weld the overlaps. 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. Apply the solvent with a circular scrubbing movement to both surfaces until they become tacky, then press the overlap together. Too much solvent used 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, fully bond the sheeting to the fixed insulation material, which should consist of high density resin bonded glass-fibre or mineral-wool slab. If you use expanded polystyrene, tape the edges well and butt all sections up to one another to minimise movement and prevent a temperature gradient 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 cause the lagging to fail completely. The best solution is to eliminate all air leaks, but if you cannot do this, use very small ventilation holes in the underside of the ductwork to prevent moist air from building up within the insulation.
PLYSOLENE-PIB is a flexible thermoplastic elastomeric sheet and does not create 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 large ductwork or installations with many flat areas where you need a flatter finish, use 1.0mm or 1.2mm sheeting.
