ALCO Updates

New Product

ALCO Shield Black MAG Underlayment
. More...

Installation Guide

ALCO Shield Detail Drawings
ALCO Shield Underlayment Installation Instructions & Drawings
are now available Online. Click Here to View...

Product Highlights

Granular+ Underlayment

The NEW & Improved ALCO Shield GRANULAR+ is now available. More...

ALCO Roof Repair Tape
24/7 Roof Repair Tape - Now available - Leak and Seam Repair Tape for TPO, EPDM, and Metal with Ultra Aggressive Sealability. More...

ALCO Warranty Information


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800-323-0029 for information on where to buy ALCO Roof Products.


ALCO Products


ALCO Shield™ SMOOTH Ice and Water Protector is used as a shingle underlayment on critical areas such as eaves, valleys, ridges, dormers and skylights. ALCO Shield™ SMOOTH protects roofing structures and the interior from water penetration caused by ice dams, wind driven rain seepage from around fasteners.

ALCO Shield™ Smooth is a polymer modified asphalt underlayment membrane, polyester fabric surface that provides a tough skid resistant underlayment and UV protection.


  • Self-adhering, but initially repositionable for easy installation
  • High tack back adhesive provides for all season installation
  • Lightly textured surface provides the anti-skid feature to keep workers safe
  • Exceptional manufacturing process and quality control for a consistent product
  • Meets or exceed industry standards and residential/commercial Model Building Codes
  • Made in Detroit - USA


ALCO Shield Smooth Ice & Water Protector
The ALCO SHIELD™ SMOOTH underlayment product offers ease-of-handling and the highest standards of manufacturing.



  • Protects structure from water seepage caused by wind driven rain, ice dams and around shingle fasteners.
  • Self-Sealing: Seals around nails, staples and screws
  • Self-Adhering: Bonds directly to the roof deck sheathing
  • May be used under asphalt shingles, metal roofing, slate shingles or tile roofing

> View Installation Instructions & Detailed Drawings

> Download PDF Data/Technical Specifications Sheet

> Architectural Specifications