Insulating brush development

In contrast, PET end-use markets have been developing for at least 10 years. When the PET bottle was introduced in 1978 and was collected in states with deposit laws, the industry for recycling them and reusing them began to develop. PET resins can be reused to make polyols for insulation and unsaturated resins for bathtubs, shower stalls, boat hulls, and auto panels. Reclaimed PET is also used for strapping, paint brushes, geotextiles, fibers for fiberfill and carpets, and other textile applications. 

In the early 1960 s investigators developed sulfur coatings which could replace mortar in masonry construction (55). Bricks, concrete, cinder, or clay blocks are stacked one upon the other until the desired wall configuration is achieved. The sulfur coating is brushed or sprayed on both exterior surfaces. The sulfur does not need to penetrate between the blocks, and the need for mortar is eliminated. The coating dries almost immediately and forms a strong, hard, and insulative surface. 

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