Polyethylene is a lightweight thermoplastic.
Polythene roof sealeqnt.
After cleaning the existing roof the spf roof can be applied directly over asphalt shingles concrete metal and wood.
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This process means that the foam can conform to all roof shapes and types even irregularly shaped roofs.
In addition to aldocoat polyurethane roof coatings you can count on aldo coatings for trusted silicone roof coatings acrylic roof coating s and thermoplastic roof coatings.
It is often abbreviated to ldpe low density polyethylene or hdpe high density polyethylene.
Aldo coatings has been manufacturing top quality durable roof coatings for more than 40 years.
Bonding polyethylene is considered very difficult and as a result it is often used as packaging for adhesive materials as the glue won t stick to it.
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Spf roofs are installed by spraying a liquid on the existing roof and allowing it to expand into a foam.
But first a little background on plastics and in particular polyolefin plastics.