Description KnuKonceptz Heat Shrink is dual wall (min 0.7mm thick) 3:1 ratio heat shrink with heat activated adhesive lining. When heated, the glue bonds the heat shrink to your cable/terminal creating a water resistant seal. Our Heat Shrink is precut in 50mm sections and includes the KnuKonceptz logo printed on one side. Price is per unit. A heat gun is required to use this product – Using a lighter/flame source will not heat this product evenly or hot enough to activate the adhesive to create an effective seal.