Mastics

KEE-Lock™ Mastic

Solvent Free
Accelerated Curing
Easy to Use

KEE-Lock Mastic is a white, polyether, trowel grade, flashing mastic, or cold-applied application. KEE-Lock Mastic is designed to seal the base edge of a KEE-Stone ® FB 60 Flashing membrane, which ties into the field of an SBS-modified membrane roofing system. KEE-Lock Mastic bonds tenaciously to SBS-modified bitumen membranes and the KEE-Stone FB 60 Flashing membrane and is extremely elastic. KEE-Lock Mastic contains zero VOCs. KEE-Lock Mastic is used in conjunction with GarMesh® to create a three-course application and can also be used for a variety of roofing repairs where white mastic is needed.

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Product Specifications

Method	Description
Trowel	KEE-Lock Mastic is ready to use right out of the pail. Just apply the mastic to the surface of the KEE-Stone FB 60 Flashing membrane with a trowel at a coverage rate of 7 linear feet per gallon at an 8 inch-wide pass ¼” thick. For best results, trowel a base coat of KEE-Lock Mastic 1/8”-thick and 8 inch-wide half onto the KEE-Stone FB 60 Flashing membrane and the other half onto the modified field membrane. Then, embed 6-inch GarMesh into the base coat and top dress with an additional layer of KEE-Lock Mastic at 1/8” thick. The top coat should be thick enough to fully embed the GarMesh and achieve a complete seal.

Method

Description

Trowel

KEE-Lock Mastic is ready to use right out of the pail. Just apply the mastic to the surface of the KEE-Stone FB 60 Flashing membrane with a trowel at a coverage rate of 7 linear feet per gallon at an 8 inch-wide pass ¼” thick. For best results, trowel a base coat of KEE-Lock Mastic 1/8”-thick and 8 inch-wide half onto the KEE-Stone FB 60 Flashing membrane and the other half onto the modified field membrane. Then, embed 6-inch GarMesh into the base coat and top dress with an additional layer of KEE-Lock Mastic at 1/8” thick. The top coat should be thick enough to fully embed the GarMesh and achieve a complete seal.

Physical Property	Value
Tensile Strength	150-250 psi
Elongation	700%

Type	Link
Data Sheets	KEE-Lock Mastic Technical Data Sheet
SDS	KEE-Lock Mastic Safety Data Sheet
SDS	KEE-Lock Mastic GHS Safety Data Sheet

Features

Accelerated Curing

KEE-Lock Mastic will cure in 1-5 days, depending on climatic conditions, compared to 30 days or more for most traditional solvent-based mastics. This mastic becomes tack-free in hours, decreasing the chances of tracking the material around the roof surface and keeping the roof cleaner.

Easy to Use

This product is ready-to-use right out of the pail requiring no mixing. The consistency of this trowel-grade formula makes KEE Lock Mastic easy to apply. The material adheres to substrates without vertical sagging or flow. It has tremendous green strength, holding KEE-Stone FB 60 Flashing in place and keeping moisture from getting underneath the flashing membranes.

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KEE-Lock™ Mastic

Product Specifications

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Features

Solvent-Free

Accelerated Curing

Easy to Use

Related Products

KEE-Stone® FB 60 Flashing

KEE-Stone® Utility Roll

KEE-Lock Water Cut-Off Sealant

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