Grayline HWT is a heavy-wall polyolefin tubing designed for superior environmental protection. This 3:1 heat shrinkable tubing features an inner adhesive wall that melts upon application, effectively filling small voids to create a complete seal against water and dirt infiltration. HWT provides robust insulation and protection for various industrial and commercial applications where environmental resistance is critical. The product's heavy-wall construction offers enhanced durability and mechanical protection, making it suitable for demanding environments.