Polyken® Shadowlastic™ Plus – Premium Flashing Tape – 627 Series

  • For window and door installations
  • 100% butyl rubber adhesive with woven backing
  • Excellent adhesion to most building surfaces
  • Provides a long-term weather tight seal to prevent moisture, air, and water vapor penetration
  • Ultimate protection against mold, mildew, damage and decay


Provides a long-term weather-tight seal to prevent moisture, air, and vapor penetration for window and door installations. Additional applications include under tile on the ridge and hip lines of roofs to prevent moisture from entering the building, deck-to-wall joints, corner board abutments, sidewall sheathing seams, and any above grade critical areas that need protection against water and air leaks.

Features & Benefits

  • Woven polyethylene backing
  • 100% butyl rubber adhesive
  • Paper release liner
  • Conformable and durable
  • Suitable for up to 3 years outdoor UV exposure
  • Provides permanent weather-tight seal on most clean, dry building surfaces
  • Good all-temperature performance
  • Compatible with sealants and caulking
  • Self-healing after puncture
  • Used properly, can contribute toward requirements for EA Credit 1 (Optimize Energy Performance) under LEED®
Item # Roll Size Units / Case Case Size Case Weight
51862740 4″ (96mm) x 100 ft 6 – Cello n/a n/a
51862760 6″ (144mm) x 100 ft 6 – Cello n/a n/a

Polyken Shadowlastic Plus Wholesale Bulk Flashing Tape

Technical & Consumer Data

Physical Properties & Typical Test Values

NOTE: The physical properties listed above are typical test results obtained from a series of laboratory tests and should not be used for the purpose of writing specifications. Before using this product, user shall determine the suitability of the product for his/her use; and user assumes all risks and liabilities in connection therewith. All test procedures used are in accordance with ASTM and PSTC methods.


Technical Data Sheet (PDF)

Sell Sheet

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