Membranes/Capsheets

KEE-Stone® Legacy

Environmentally Conscious Raw Materials
High-Performance Formulation
Sustainably-Focused Design

KEE-Stone Legacy is a sustainably-designed fleece-backed thermoplastic membrane that complies with ASTM D4434, Type III standards, featuring ELVALOY™ Ketone Ethylene Ester (KEE).

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Product Specifications

Method	Description
Hot-Applied	KEE-Stone Legacy can be installed over Garland- approved modified base sheets; see the KEE-Stone Installation Guide for a list of approved base sheets. Adhere one ply of approved base sheet solidly to the approved substrate. Adhere KEE-Stone cap sheet using ASTM D 312, Type III or IV asphalt or Garlastic® KM Plus modified asphalt at a rate of 25 lbs. per 100 sq. ft. Once the membrane is in place, immediately roll the membrane with a clean, 75 lb. (minimum) weighted roller to ensure proper adhesion and to remove air pockets from under the membrane. Once the KEE-Stone Legacy is adhered, heat-weld and seal the side and head laps using hot air welding equipment and a clean, 2” silicone roller.
Cold-Applied	KEE-Stone Legacy can be installed over Garland- approved modified base sheets; see the KEE-Stone Installation Guide for a list of approved base sheets. Adhere one ply of approved base sheet to the approved substrate. Apply the KEE-Stone Legacy cap sheet using Garland’s KEE-LockTM Spatter Spray (refer to the KEE- Stone Application Guide for more information). Once the membrane is in place, immediately roll the membrane with a clean, 75 lb. (minimum) weighted roller to ensure proper adhesion and to remove air pockets from under the membrane. Once the KEE-Stone Legacy is adhered, heat-weld and seal the side and head laps using hot air welding equipment and a clean, 2” silicone roller.

Method

Description

Hot-Applied

KEE-Stone Legacy can be installed over Garland- approved modified base sheets; see the KEE-Stone Installation Guide for a list of approved base sheets. Adhere one ply of approved base sheet solidly to the approved substrate. Adhere KEE-Stone cap sheet using ASTM D 312, Type III or IV asphalt or Garlastic® KM Plus modified asphalt at a rate of 25 lbs. per 100 sq. ft. Once the membrane is in place, immediately roll the membrane with a clean, 75 lb. (minimum) weighted roller to ensure proper adhesion and to remove air pockets from under the membrane. Once the KEE-Stone Legacy is adhered, heat-weld and seal the side and head laps using hot air welding equipment and a clean, 2” silicone roller.

Cold-Applied

KEE-Stone Legacy can be installed over Garland- approved modified base sheets; see the KEE-Stone Installation Guide for a list of approved base sheets. Adhere one ply of approved base sheet to the approved substrate. Apply the KEE-Stone Legacy cap sheet using Garland’s KEE-LockTM Spatter Spray (refer to the KEE- Stone Application Guide for more information). Once the membrane is in place, immediately roll the membrane with a clean, 75 lb. (minimum) weighted roller to ensure proper adhesion and to remove air pockets from under the membrane. Once the KEE-Stone Legacy is adhered, heat-weld and seal the side and head laps using hot air welding equipment and a clean, 2” silicone roller.

Physical Property	Value
Tensile Strength	MD 589 lbf/in (2565 N)
Tear Strength	MD 97 lbf (431 N) XD 144 lbf (641 N)
Elongation	MD 40% XD 40%
Low-Temp Flex	-40°F (Pass) (-40°C)

Eco-Fact	Value
Solar Reflectance	Initial: 0.87 Aged: 0.75
Solar Emittance	Initial: 0.88 Aged: 0.88
SRI	Initial: 110 Aged: 93

Type	Link
Data Sheets	KEE-Stone Legacy Data Sheet
SDS	KEE-Stone SDS
Benefits	KEE-Stone Legacy Features and Benefits
Application Guidelines	KEE-Stone Cold App Guide
Application Guidelines	KEE-Stone Hot App Guide

Features

High-Performance Formulation

KEE-Stone Legacy is engineered with a proprietary blend of fire retardants designed to deliver superior resistance in the most demanding environments. Rigorously tested under extreme conditions, KEE-Stone Legacy achieved a UL Class A fire rating—the industry gold standard for commercial safety. This provides uncompromised protection for both combustible and non-combustible decks at slopes up to 3:12, ensuring your assets remain secure.

Sustainably-Focused Design

KEE-Stone Legacy contains 20% recycled content in both the membrane and the reinforcement, helping to reuse and divert materials from landfills. The compound below the scrim has a non-phthalate liquid plasticized compound for improved flexibility and enhanced environmental performance.

Modified Bitumen

KEE / Thermoplastic

Standing Seam Metal Roofing

Wall Panels & Rainscreens

Edge Metal

Metal Accessories

Restoration Systems

Metal

Modified Bitumen Roof Surface Coatings

Facades / Walls

Garland's Process

Roof Assessment

Envelope Services

OMNIA Partners

Vizient

Premier Partners

GSA

CMAS (CA)

COMMBUYS (MA)

EducationPlus (MO)

Equalis Group (OH)

Vegetative Roofing

Solar Roofs

K-12

Higher Education

Garland Federal Division

Garland Federal Partner Program

Municipalities

Correctional Facilities

First Responders

Rec Centers & Natatoriums

Architects & Design Professionals

Membranes/Capsheets

KEE-Stone® Legacy

Product Specifications

Technical Data

Application

Physical Properties

Sustainability

Documents

Features

Environmentally Conscious Raw Materials

High-Performance Formulation

Sustainably-Focused Design

Related Products

KEE-Lock™ Spatter Spray

KEE-Stone® Legacy NF Flashing

KEE-Lock™ Flashing Adhesive