Technical Specifications

ManualsBrandsTarco ManualsBuilding materialsLeak Barrier Granulated Ice & Water Barrier 3' X 65' (195 sq. ft.)

LeakBarrier MS300 Ice and Water Armor helps to protect a building’s deck or internal structure against

leaks caused by ice and water damming and wind-driven rain. It is highly effective in critical rooﬁng areas such

as valleys, ridges, coping joints, chimneys, vents, dormers, skylights and low-slope sections.

LeakBarrier MS300 Ice

and Water Armor is a glass

ﬁber reinforced, self-adhesive

modiﬁed bituminous rooﬁng

underlayment for use under

slate and asphalt shingles.

Mineral granules on the

upper surface provide

enhanced skid resistant

properties.

Tarco

LeakBarrier

MS300 Ice and Water Armor

LeakBarrier

MS300 Ice and Water Armor

Usage

Features and Benets

 Skid resistant surface provides improved footing

 Release ﬁlm peels off for easy installation and

handling

 30 day exposure limit

 Adheres directly to concrete, plywood, wood

composition board and gypsum sheathing

 Self-sealing around nails, preventing moisture

penetration

 MS300 rolls must be stored indoors, in a dry location.

 Rolls must be stored on end only. Do not store in a

leaning position.

 The rolls must be protected from the elements. Do

General Precautions

 Install MS300 only when material interface

temperatures (air, deck, material) are 40

F and rising.

 Do not install when any form of moisture such as

water, ice, snow, dew, rain, etc. is present.

 Ensure roof has positive drainage prior to installation.

 Proper ventilation is critical. When applying over the

entire roof deck, the rooﬁng system must provide

sufﬁcient ventilation, including both ridge and sofﬁt

venting.

 A full, irreversible adhesion is achieved when the

underlayment goes through a complete heat cycle. Do

Storage

 Meets ASTM D 1970

 ICC-ES ESR-2116

 Miami-Dade County Approval NOA No. 12-0420.02

 Florida Building Code FL 10450-R4

 CCMC

13451-R

 UL Prepared Rooﬁng Accessory File No. R16744

 Available in 1 sq. and 2 sq. rolls

not expose rolls to direct sunlight.

 Store rolls at room temperature. Prolonged exposure

to elevated temperatures may reduce the adhesive

characteristics of the membrane.

not attempt to remove the underlayment immediately

after adhesion to the substrate.

 Use of a hand-held “hot air gun” might help

in enhancing adhesion during application of

underlayment in cooler weather.

 MS300 must be covered with a ﬁnished roof covering

within the speciﬁed exposure time of the product.

Refer to section on Features and Beneﬁts for exposure

times.

Summary of content (2 pages)

PAGE 1
Tarco LeakBarrier® MS300 Ice and Water Armor LeakBarrier MS300 Ice and Water Armor is a glass fiber reinforced, self-adhesive modified bituminous roofing underlayment for use under slate and asphalt shingles. Mineral granules on the upper surface provide enhanced skid resistant properties. Usage LeakBarrier MS300 Ice and Water Armor helps to protect a building’s deck or internal structure against leaks caused by ice and water damming and wind-driven rain.
PAGE 2
Surface Preparation  Surface must be clean, dry, and without voids that may interfere with adhesion.  For re-roofing, all old roofing and other loose materials must be removed prior to installation.  Acceptable substrates for adhesion of LeakBarrier Application  Cut MS300 roll to suitable, manageable lengths before installation.  Place a full width piece of the pre-cut MS300 underlayment on the substrate, parallel to the eave (low) edge of the roof.