ALCO Roof Coatings & Construction Specialty Producs to be discontinued.

Read Notice Here >


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


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


Alco-Shield High Temp (HT) Ice and Watre protector underlayment


ALCO Shield™ HT Ice and Water Protector is designed to be used as a waterproofing underlayment with standing seam metal roofing, metal shingles, metal roof panels and asphalt shingles. ALCO Shield HT protects roof structures, roof assemblies and the building interior from water penetration caused by ice dams, pooling water and wind driven rain.

ALCO Shield HT is a polymer modified asphalt underlayment membrane, glass fiber reinforced with a lightly textured, tough, skid resistance surface.


ALCO Shield High Temp Ice & Water Protector
The ALCO SHIELD HT underlayment product offers a high temperature installation rating with the ALCO high standard of manufacturing.



  • Self-adhering for easy installation
  • Split Release - peel off backing sheet
  • Proprietary formulation and adhesive backing - Installs in most hot or cold weather conditions
  • Top adhesive selvadge-edge - eases alignment and enhances lap sealing
  • Exceptional manufacturing process and quality control for a consistent product
  • Meets or exceeds industry standards and residential/commercial building codes
  • Meets current ASTM D-1970 criteria.
  • Made in Detroit - USA


  • High temperature resistance of 240° F
  • Self Sealing: Seals around nails, staples and screws
  • Self-Adhering: Bonds directly to the roof substrate
  • Excellent for under metal, slate, tile or asphalt shingles
  • Repositionable adhesive backing – allows for accurate installations and overlaps.

> View Installation Instructions & Detailed Drawings

> Download PDF Data/Technical Specifications Sheet

> Architectural Specifications