Name: LIBERTY Flashing Cement
Brand: GAF

About LIBERTY™ Flashing Cement

Seal a variety of roof materials with LIBERTY^™ Premium Flashing Cement. This bonding agent works with shingles, metal, built-up asphalt, SBS modified bitumen membrane end laps and perimeter edges, metal-edge flashing, gutter seams, and air conditioning ducts. This product provides bonding strength and flexibility while being easily applied with a 1/4” notched trowel or squeegee.

Installation based on applicator type:

Membrane flashing: Apply cement at 1 to 2 gallons per square (.4 – .8 L/m2) to substrate only.
Coursing: Apply cement to surface and install glass, polyester fabric, or asphalt-coated cotton fabric into cement. Repeat as wanted. Finish with a final layer of cement.
Metal: Prime metal. Set metal flanges into a full bead of 1/8” (3mm) thickness. Apply cement between joints and apply pressure so that a bead of cement is visible at joint edge.
Sealing/repairs: Apply cement at a 1/8 inch (3 mm) to 1/4 inch (6 mm) thickness, working the cement into the opening or crack and spreading beyond repair area approximately 2” – 4” (51 – 102 mm).

A cold-applied bonding agent for a wide variety of roofing components

LIBERTY^™ Flashing Cement is ideal for a wide variety of sealing, bonding, and repairing applications in areas where temperature-related expansion and contraction occurs.

CONSISTENCY

Trowel-grade consistency makes it ideal for flashing details, attaching membrane to steep slopes and parapet walls, and a variety of roofing and waterproofing repairs.
STRENGTH AND FLEXIBILITY

This product offers excellent bonding strength and high flexibility to accommodate temperature-related expansion and contraction of the roof system.
CONVENIENT APPLICATION

This product can be applied with a 1/4” notched trowel or squeegee, and it maintains excellent low-temperature flexibility.

Liberty Flashing Cement Sell Sheet RESLB403

Data Sheets
- PDF
Liberty System Sell Sheet RESLB100

Data Sheets
- PDF
Liberty System Sell Sheet SPANISH RESLB100S

Data Sheets
- PDF
LIBERTY™ Flashing Cement SDS - 4132

Safety Data Sheets
- PDF
RESLB507-PDF-1223_Liberty Calculator

Installation Instructions and Guides
- PDF
RESWT176 - Golden Pledge Limited Warranty Addendum for Low-Slope Roofs

Warranties Guarantess and Addendums
- PDF
RESWT220 - Silver Pledge Limited Warranty Addendum for Low-Slope Roofs

Warranties Guarantess and Addendums
- PDF

LIBERTY™ Installation — Step-by-step*

Step 1

Inspect the roof, and repair or replace damaged areas.
Step 2

Apply LIBERTY™ Asphalt Primer at a rate of a 1/2 gallon per 100 sq. ft.
Optional (for 2-ply system):

Install LIBERTY™ Self-Adhering Base/Ply.
Step 3

Install edge flashing at all eave and rake edges, and apply LIBERTY™ Flashing Cement on exposed flange.
Step 4

Install LIBERTY™ Self-Adhering Cap Sheet.
Step 5

Clean up by removing tools, unused materials, and other debris. Plan on inspecting roof annually if possible.