Technical Specifications
© 2015 Tarco All Rights Reserved. Printed in U.S.A.
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.
Align MS300 so that it is parallel with the edge
of the eave and extend over the eave and rake
approximately 3/8".
Place the side lap on the up side of the roof, fold
back the sheet, and remove the exposed release film,
taking care not to displace the sheet.
Working from the center out, roll the sheet onto the
substrate, taking care to avoid wrinkles and ridges.
MS300 must be set straight. Repeat this process for
the remaining half of the sheet.
Starting at the middle and extending to one end of
MS300, drive securing nails in 18" centers in the side
lap area, 1½" from the edge. Do not drive the nails all
the way in.
Backroll the unsecured portion of the roll up the
middle where the first securing nail is driven.
Apply a 1/16" thick layer of roofing lap cement over
the eave and rake metal drip edges extending 2" to 3"
onto the deck surface where the roll will intersect.
Remove the securing nails from the other half of
MS300, backroll and apply in like manner.
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
Property Typical Values Reference Test
Tensile Strength, MD 25 lbf/in ASTM D1970
Tensile Strength, XMD 25 lbf/in ASTM D1970
Elongation, mod. bit. portion 10
%
min ASTM D1970
Adhesion to Plywood
@
40°F 2 lb/ft of width ASTM D1970
Adhesion to Plywood
@
75°F 15 lb/ft of width ASTM D1970
One Information Way, Suite 225
Little Rock, AR 72202
501-945-4506
800-365-4506
Fax: 501-945-7718
www.tarcoroofing.com
Properties
Product Data 1 Square 2 Square
Width 36 in 36 in
Length 33 ft 65 ft
Weight 30 lb 60 lb
(nominal) (nominal)
Thickness 56 mil 56 mil
(nominal) (nominal)
Property Typical Values Reference Test
Thermal Stability, max 0.1 inch ASTM D1970
Flexibility Temperature -20° F ASTM D1970
Tear Resistance, MD & XMD 20 lbf ASTM D1970
Slip Resistance Pass ASTM D1970
Moisture Vapor Permeance 0.1 U.S. Perms ASTM D1970
(max)
Warranty MS300
Ice and Water Armor
is warranted to be free from manufacturer’s defects.
Tarco
Revised 3/2015
membranes can be found at the Tarco website.
For best results, surface may be primed with an
ASTM D 41 Primer prior to installation of MS300.
When primer is used, ensure the primer is fully dry
prior to application of MS300.
On slopes greater than 2:12, drive nails flush in the
selvage area 1½" from the edge on 18" centers,
after MS300 has been applied and prior to the next
overlapping course.
Apply full roll width, a 1/16" thick layer of roofing lap
cement to the surface of the first course in the 6" end
lap area before adhering the next course.
Apply the next eave course in the same manner
overlapping the first course at the end lap by 6".
Lap the succeeding course over the lap area.
Apply succeeding courses in like manner, as in steps
above.
Stagger the end laps a minimum 3' from the
preceding course.
Install capped or tin tagged nails 6 inches on center
in the middle of the selvage edge (side lap) or fasten
according to applicable Building Codes.
At the T-joint (where an end lap and next overlapping
course intersect), apply a bead of roofing lap cement
before the overlapping course is laid.
Roll the entire membrane surface, paying special
attention to side laps, end laps and T-joints. Roller
weight shall be 70 lb. minimum for low slope (<2:12
pitch) and 28 lb. minimum for steep slope (>2:12
pitch).
NOTE: All statements, information and data, given herein are believed to be accurate and reliable but are presented without guaranty, warranty or responsibility of
any kind, expressed or implied, except as may be indicated otherwise in this literature. Statements or suggestions concerning possible use of our products are
made without representation or warranty that any such use is free of patent infringement and are not recommendations to infringe any patent.