Underlay-M
LATEX MASTIC UNDERLAYMMENT
DESCRIPTION:
The Underlay-M system is a two component system consisting of a
modified SBR latex emulsion and a compatible portland cement filler
mix. These components are mixed together on the job and installed
by trained mechanics to provide a uniform monolithic subsurface
to receive a finished flooring or a thick bed mortar for stone,
quarry or ceramic tile.
USE:
A rubber mastic composition designed to underlay and provide an
acceptable surface for various floor coverings such as resilient
tile, carpet, ceramic or quarry tile and vinyl sheeting. Underlay-M
is also designed to provide slope and as a thick bed mortar.
ADVANTAGES:
• Easy to install.
• Excellent bond to concrete, wood and metal with a minimum
of preparation.
• Highly resilient.
• Crack resistant.
• Fire retardant.
• Good thermal and acoustical insulating properties.
• Trowels to a smooth and uniform finish.
• Helps reduce subgrade heads of water (hydrostatic pressure).
LIMITATIONS:
• Not recommended for heavy rolling loads.
• Powder should not be exposed to moisture prior to application
and liquid must not be allowed to freeze.
CONSIDERATIONS
FOR INSTALLATION:
When covering wood sheathing, wire or expanded reinforcing metal
should be used. When Underlay-M is applied in thick section (over
1") additional time should be allowed for curing. Thick section
fills are normally installed with a drier mix to enhance workability.
In such cases, a wetting (“slurry”) coat MUST be applied
PRIOR to the application of the underlayment. Concrete should be
free of dirtand laitence. When used as thermal insulation in conjunction
with Mer-Ko Weather Deck, consult a Mer-Ko representative for standard
specifications.
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