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MASONS SUPPLY COMPANY
Oregon (800) 537-3407 ♦ Washington (800) 537-6216
Clackamas | Eugene | West Eugene | Hillsboro | Medford | Portland | Salem | Wilsonville | Ridgefield | Seattle | Tacoma | Woodinville
M A S C O . N E T
SLAB/HORIZONTAL
VAPOR RETARDER
Moistop
®
Concrete Slab
Building Wall
Compacted
Subgrade
6"-8" Open
Drain Rock
Moistop
®
Moistop is an extremely effective Underslab Vapor
Retarder. meets ASTM E 1745-96 requirements for Water
Vapor Permeance. Moistop is approximately 12 mils thick
constructed from a multi-layer composite employing
polyethylene for superior barrier performance and
fiberglass reinforcing for tear strength and puncture
resistance. The result of this unique multi-ply construction is
a product that provides: low perm rating, high degree of
puncture resistance, tear and scuff resistance and life long
performance. Prior to the placing of steel reinforcing and
pouring of concrete, the ground is leveled and tamped.
Moistop should then be rolled out parallel with the direction
of the pour. All seams should be overlapped no less than 6
inches and seamed with Moistop Tape.
Moistop
®
Tape
Moistop Tape was designed for use with all Moistop Underslab
vapor retarders. Improved adhesion assures moisture tight
joints. Moistop Tape also exhibits vapor retarding performance
characteristics as required by ASTM E 1745-96. Prepare substrate
by making it clean and dry. Apply tape evenly over seam and
rub out any wrinkles formed during application.
No.
Size
Wt (lbs)
GP MOST8 8' x 250'
85.0
No.
Size
Wt (lbs)
GP MOST499-4 4" x 108'
2.5