Polyken Shadowlastic Plus Window & Door Flashing Tape (627-20)

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  • Quantity
    View "Full Pricing Table" below for details including case sizes and volume pricing.
  • Color
    Black / With Printing
  • Size
    Purchased Most Frequently: 6 in. x 100 ft. (Black / With Printing)
  • Price
    $ Price/photo will update once Color & Size chosen.
Before ordering, please read the "Product Description & Specs" tab content for more information about this item.

Product Description

Polyken 627-20 Shadowlastic Plus Window & Door Flashing Tape is designed to perform in a variety of flashing and weatherproofing applications including window and door installations, corner board abutments, and sealing other detail areas against water and air penetration. Polyken 627-20 is also used in sidewall sheathing seams and deck-to-wall joints and has an excellent bond to a variety of building materials including plywood, OSB, housewrap, concrete, and most metals. This tape features a woven polyethylene backing which is conformable, durable, and suitable for up to 3 years of outdoor UV exposure.

Polyken 627-20 Shadowlastic Plus provides a permanent weather-tight seal on most clean, dry building surfaces and is compatible with sealants and caulking. The paper release liner is easy to remove making for a quicker installation. Polyken Shadowlastic Plus Flashing Tape has an installation temperature of 30°F to 180°F (-1°C to 82°C) and an operating temperature of -30°F to 200°F (-34°C to 93°C)

Polyken 627-20 Shadowlastic Plus Window & Door Flashing Tape can contribute toward requirements for EA Credit 1 (Optimize Energy Performance) under LEED when used properly and meets AAMA-711, ASTM E2112 specifications.

Features and Benefts

  • Provides a strong and immediate adhesion even during extremely cold conditions
  • Formulated for conformability in both warm and cold weather temperatures
  • Excellent compatability with most sealants and caulking materials
  • Easy application - just peel and stick
  • Resists UV degradation for up to 3 years of direct exposure to sunlight
Country of Origin: United States.


Technical Information

Polyken Shadowlastic Plus Window & Door Flashing Tape (627-20)
  • Standards Met: AAMA 711 and ASTM E2112 requirements
  • Carrier/Backing: woven polyethylene (printed)
  • Adhesive: butyl rubber   How are adhesives different?
  • Release Liner: kraft paper liner
  • Thickness: 20 mils (carrier, adhesive)   What is mil thickness?
  • Adhesion: 219 ounces per inch (to stainless steel test panel)
  • Tensile Strength: 59 pounds per inch (longitudinal)
  • Service/Operating Temperature: -30°F to 200°F
  • Country of Origin: United States
Note: Specifications are those given by manufacturers and are not tested for accuracy.

Download Datasheets

The following downloads are available for this product:

Download Safety Data SheetDownload Technical Data Sheet

627-20 Standard sizes


4 in. x 100 ft.

627-20/ 4100

UPC = 742366008343

Single Item (1-5 Items)

1 - 4 Cases (6-29 Items)

5 - 9 Cases (30-59 Items)

10+ Cases (>= 60 Items)


a 4% discount

a 5% discount

a 6% discount





6 in. x 100 ft.

627-20/ 6100

UPC = 742366008350

Single Item (1-5 Items)

1 - 4 Cases (6-29 Items)

5 - 9 Cases (30-59 Items)

10+ Cases (>= 60 Items)


a 4% discount

a 4% discount

a 5% discount





Question & Answers

User Reviews

Made in the USA
hot melt rubber (synthetic)
Offers the widest range of application flexibility available. Exhibits excellent processing performance whether manually or automatically applied. Has superior tensile strength, adhesion properties and holding force which ensures consistent, reliable seals. Hot melt adhesive will bond faster to a surface which is referred to as quick-grab or quick-stick. It typically has higher tack (will feel stickier to the touch), but is also softer. It has lower heat resistance, shear resistance, and sometimes UV resistance than an acrylic adhesive. NOTE: it is called hot melt because the adhesive is applied hot by the manufacturer and then hardens as it cools (you do not need to apply heat to the tape yourself).
natural rubber
Properties are similar to that of hot melt rubber, but natural rubber often holds where other adhesives won't (recycled fibers, dust, cold, heat and heavy loads). It provides good overall adhesion and moisture resistance.
Offer excellent performance, especially for applications in temperatures less than 40°F and greater then 120°F. It provides excellent clarity, has high shear strength, is usually more permanent/durable even when exposed to moisture, and it ages well over extended periods in fluorescent and sunlight. Since it remains clear for the life of the application and does not yellow over time it is ideal for applications such as sealing white cartons. While it has good initial adhesion it does take 24-48 hours to cure and to achieve its maximum bond strength (has gradual adhesion buildup). Another difference between hot melt rubber and acrylic adhesive is if you fold tape over making the two adhesive sides touch the acrylic adhesive will remain attached to the carrier (e.g. paper, film) while a hot melt adhesive will stick to itself and pull off of the carrier. It is the best choice for clarity, UV resistance and aging characteristics.
Is great for extreme temperature applications since silicone adhesive can work in continuous operating temperatures from -100°F to 500°F. They also exhibit good chemical resistance, retain electrical properties, and remove cleanly with little or no residue.
zinc oxide
Zinc oxide based adhesive formula is a skin-friendly adhesive which is commonly used on sports medicine tapes.
Thickness, AKA caliper or gauge, refers to the distance from one surface of a tape backing, or adhesive, to the other.
1 mil = 1/1000 of an inch
Examples: 1/16 inch = 62.5 mils; 1/32 inch = 31.25 mils
The cut level indicates how many grams of cutting load a glove can withstand from a sharp blade before being penetrated.
Lower gauge gloves are heavier - have thicker construction, fewer stiches knitted per inch and offer less dexterity.
Higher gauge gloves are lighter - have thinner/finer construction, more stitches knitted per inch and offer more dexterity.
Gloves offered typically runs from 7 to 18 (12 and 13 are in the middle of the scale).
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