Underlayment surface preparation, Using l, Floor underlayment all purpose sealer – USG Levelrock Floor Underlayment Finished Floor User Manual

Page 5

Underlayment Surface Preparation

Using L

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Floor Underlayment All Purpose Sealer

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™

floor underlayment all purpose sealer can be applied to most L

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floor

underlayments prior to the application of floor-covering adhesives to enhance the bond between
the underlayment and the adhesive . L

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all purpose sealer can be applied by the floor

covering manufacturer or a USG L

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authorized applicator . The recommendations of the

floor-covering and adhesive manufacturers will supersede those presented here .

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all purpose sealer is a concentrated formula and must be diluted prior to use . All

purpose sealer is tinted light red to identify application and just one coat application is
recommended . Note – Do not use L

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all purpose sealer with L

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4500 NXG

or L

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uik

-t

floor underlayments, as these contain a built-in sealer .

Instructions for USG L

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Authorized Applicator

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all purpose sealer can be applied to L

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floor underlayment by a USG L

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authorized applicator 2 hours after the underlayment has been installed; or as soon as the
floor can be safely walked on .

At the jobsite, L

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all purpose sealer and the underlayment must be maintained between

50-95 °F for 48 hours before, during and after job completion . Radiant heat systems should
be shut down and cooled off during application and drying of the sealer . Underlayment must be
free of dirt, wax, polish, paint, excess dust or other contaminates before application of sealer .
Should the surface of the L

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floor underlayment be excessively dusty, contact your

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Lcorp

Network representative for further instructions .

Spray apply L

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all purpose sealer for best results . When spray-applying, a uniform

application is critical . Voids may compromise the sealer performance and detrimentally affect
adhesive bond . May also be broom- or roller-applied . Apply diluted solution of sealer at a rate
of 300 sq . ft ./gal . (see pages 14-15 for recommended application and dilution rates) . Do
not allow sealer to puddle, back-roll if necessary . For smaller areas, a roller may simplify
application . L

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all purpose sealer is not a wear surface .