Base and Ply Sheets

HPR® Torch-Applied Base Sheet

High Tech Base Sheet
Superior Strength
Advanced Rubber Technology

HPR Torch Base Sheet is the underlayment ply for any of Garland's torch-applied membranes. HPR Torch Base Sheet is a Styrene-Butadiene-Styrene (SBS) membrane specially formulated to accept the high heat from a torch. It has a burnable polypropylene backer that melts when the proper torching temperature has been reached. The HPR Torch Base Sheet eliminates the use of a kettle and also allows the torch-applied system to be installed with a one-ply underlayment. DO NOT USE the HPR Torch Base Sheet with hot asphalt or cold adhesives.

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Product Specifications

Method	Description
Torch-Applied	Garland's 2-ply torch applied systems incorporate asphalt-based membranes and base sheets containing the latest SBS (styrene-butadiene-styrene) and fire retardant compounds, and scrims from fiberglass and polyester reinforcements. Garland's torch membranes are manufactured with a burnable polypropylene backer that melts when the proper torching temperature is applied to the back of the membrane. The 2-ply torch systems eliminate the use of a kettle and can be installed with just one ply of underlayment.

Method

Description

Torch-Applied

Garland's 2-ply torch applied systems incorporate asphalt-based membranes and base sheets containing the latest SBS (styrene-butadiene-styrene) and fire retardant compounds, and scrims from fiberglass and polyester reinforcements. Garland's torch membranes are manufactured with a burnable polypropylene backer that melts when the proper torching temperature is applied to the back of the membrane. The 2-ply torch systems eliminate the use of a kettle and can be installed with just one ply of underlayment.

Physical Property	Value
Tensile Strength	MD 210 lbf./in. (36.75 kN/m) XD 210 lbf./in. (36.75 kN/m)
Tear Strength	MD 300 lbf. (1334 N) XD 300 lbf. (1334 N)
Elongation	MD 6.0% XD 6.0%
Low-Temp Flex	-30°F (-34°C)

Type	Link
Data Sheets	HPR Torch Base Sheet Technical Data Sheet
SDS	Glass Rolled Goods Safety Data Sheet
SDS	FlexBase 80 & Other Rolled Goods Safety Data Sheet
Application Guidelines	HPR Torch-Applied Two Ply Application Guidelines

Features

Superior Strength

The HPR Torch Base membrane is reinforced with a dual fiberglass scrim. The superior strength provided by this reinforcement resists the movement created by today's modern buildings. In addition, HPR Torch Base Sheet provides tensile strength in excess of 200 pounds per inch in the machine direction. This translates to long-term resistance to splits and tears in the completed HPR torch-applied roof system.

Hand adjusting temperature on electric thermostat

Advanced Rubber Technology

The modifier utilized in HPR Torch Base Sheet is SBS. When the SBS rubber is properly dispersed throughout the high-penetration asphalt, the rubber provides increased thermal resistance, UV protection, heat resistance, elongation, and low-temperature flexibility. A special high-shear mixer is used in manufacturing to ensure proper dispersion.

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Base and Ply Sheets

HPR® Torch-Applied Base Sheet

Product Specifications

Technical Data

Application

Physical Properties

Documents

Features

High Tech Base Sheet

Superior Strength

Advanced Rubber Technology

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