Membranes/Capsheets

KEE-Stone® FB 60 (2-Ply Hybrid Roof System)

Long Lasting & Durable
Superior Chemistry & Manufacturing
UV Resistant & Energy Saving

KEE-Stone FB 60, a thermoplastic cap sheet modified with Ketone Ethylene Ester (KEE), is designed as the top component in a multi-ply hybrid system incorporating Garland-approved modified bitumen base sheets. This unique sheet incorporates the industry’s highest quality KEE formula, Dow ELVALOY™ HP, for superior flexibility and strength. Under the attractive, bright white surface, this membrane is reinforced with a unique polymer-coated high tensile strength polyester scrim. This distinctive composition provides exceptional puncture, tensile, and tear resistance while preserving the membrane's flexibility. Polyester fleece (6.5 oz. per sq. yd.) is heat bonded to the backside for superior adhesion in hot or cold adhesives. KEE-Stone meets and exceeds ASTM D 6754, the standard specification for KEE-based sheet roofing.

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Product Specifications

Method	Description
Hot-Applied	KEE-Stone FB 60 can be installed over Garland-approved modified base sheets; see the KEE-Stone FB 60 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, Garland’s HPR® All-Temp Asphalt or Garlastic® KM Plus modified asphalt at a rate of 25 lbs. per 100 sq. ft. Once the KEE-Stone FB 60 is adhered, heat-weld seams to seal the membranes together.
Cold-Applied	KEE-Stone FB 60 can be installed over Garland-approved modified base sheets; see the KEE-Stone FB 60 Installation Guide for a list of approved base sheets. Adhere one ply of approved base sheet solidly to the approved substrate. Apply KEE-Stone cap sheet using Garland’s KEE-LockTM Foam adhesive with 1⁄2” to 3⁄4” wide beads (1.27- 1.90 cm), 12” o.c. (30.5 cm). Once the membrane is in place, roll the membrane with a weighted roller to ensure contact with the adhesive and remove air pockets from under the membrane. Once the KEE-Stone FB 60 is adhered, heat-weld seams to seal the membranes together.

Method

Description

Hot-Applied

KEE-Stone FB 60 can be installed over Garland-approved modified base sheets; see the KEE-Stone FB 60 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, Garland’s HPR® All-Temp Asphalt or Garlastic® KM Plus modified asphalt at a rate of 25 lbs. per 100 sq. ft. Once the KEE-Stone FB 60 is adhered, heat-weld seams to seal the membranes together.

Cold-Applied

KEE-Stone FB 60 can be installed over Garland-approved modified base sheets; see the KEE-Stone FB 60 Installation Guide for a list of approved base sheets. Adhere one ply of approved base sheet solidly to the approved substrate. Apply KEE-Stone cap sheet using Garland’s KEE-LockTM Foam adhesive with 1⁄2” to 3⁄4” wide beads (1.27- 1.90 cm), 12” o.c. (30.5 cm). Once the membrane is in place, roll the membrane with a weighted roller to ensure contact with the adhesive and remove air pockets from under the membrane. Once the KEE-Stone FB 60 is adhered, heat-weld seams to seal the membranes together.

Physical Property	Value
Tear Strength	120 lbf. min. (534N)
Elongation	At Break : 40% At Break, strip: >90% of original

Eco-Fact	Value
Solar Reflectance	0.87
Solar Emittance	0.88
SRI	110

Type	Link
Data Sheets	KEE-Stone FB 60 Technical Data Sheet
SDS	KEE-Stone FB 60 Membrane Safety Data Sheet
SDS	KEE-Stone Products OSHA WHMIS GHS Safety Data Sheet
Benefits	KEE-Stone Thermoplastic Membrane Benefits
Application Guidelines	KEE-Stone Cold Application Guide
Application Guidelines	KEE-Stone Hot Application Guide

Features

Superior Chemistry & Manufacturing

Garland’s KEE-Stone thermoplastic chemistry uses the industry’s highest quality KEE compound for the longest-lasting weatherability. This formula exhibits superior heat resistance while retaining its low-temperature flexibility. While some thermoplastic sheets only add quality KEE above the scrim, KEE-Stone is formulated with KEE throughout the entire sheet because the sheet is only as strong as its weakest point.

Long-Lasting & Durable

KEE-Stone exceeds standard weathering tests, standing up against even the harshest weather and UV radiation. In accelerated weathering tests, KEE-Stone shows no signs of cracking or cratering even at 100X magnification, ten times more than the ASTM standard requires. KEE-Stone retains more than 90% of its breaking strength, elongation, and flexibility in heat aging tests.

UV Resistant & Energy Saving

KEE-Stone’s white surface and advanced chemistry fight off the damaging effects of the sun to protect your building and your wallet. KEE-Stone’s bright finish reflects damaging UV rays away from the building. At the same time, the KEE formula locks the plasticizer within the membrane to prevent damaging migration that causes lesser materials to dry and crack under UV exposure. These resilient properties earned the Cool Roof Rating Council (CRRC) seal.

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KEE-Stone® FB 60 (2-Ply Hybrid Roof System)

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Features

Superior Chemistry & Manufacturing

Long-Lasting & Durable

UV Resistant & Energy Saving

Related Products

KEE-Stone® NF 60 Flashing

KEE-Stone® Utility Roll

KEE-Lock™ Mastic

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