Spectra-Guard® HSL

Heat Seal Coating



Water-Based Blister Packs
Heat Activated Seal Envelopes

  • Spectra-Guard® HSL is an aqueous based heat seal coating. The formulation allows superior bonding when the coating comes in contact with itself and heat is applied.
  • Spectra-Guard® HSL can be glued with cold-set adhesives or hot-melt adhesives. Spectra-Kote® can provide you with a detailed list of qualified adhesives best suited for use with this product.
    Spectra-Guard® HSL is overprintable using Flexographic presses. It is recommended that all inks be reviewed for suitability of ink coverage.
  • Spectra-Guard® HSL is suitable for application with rod, roll, blade and gravure equipment. Minimal heat addition is recommended and the use of liner chiller systems when available.
  • Coating Type Proprietary Polymer
    Color Liquid / Dry :: White / Clear
    pH 6.5 — 7.5
    Viscosity #2 Zahn (sec) 20.0 — 40.0
    Repulpability Yes
    FDA Compliant* Yes
    Freeze / Thaw Stable
    *For complete compliance information please contact Spectra-Kote®. The above
    properties are typical values and should not be interpreted as product specifications.

  • Spectra-Guard® HSL water-based formulation is specially designed for simple handling. This non-hazardous odorless coating can be washed clean from machinery with soap and water. The coating is compatible with standard industry water-based cleansers. If the coating comes in contact with the skin, simply rinse with water.