Instructions / Assembly

LANCO–TheHomeDepotInstructions/Assembly—
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When applied as directed, Lanco® Siliconizer™ will provide a waterproof and weatherproof seal adhering
tightlytomostsurfacesandwillnotcrack,crumbleorpeeldespiteexposuretosevereweatherortotaljoint
movement.Lanco®Siliconizer™reflectssunraysandreducesinsidetemperatures.
USES: For waterproofing and protecting a wide assortment of approved roofing systems and/or substrates
that are structurally sound suchasconventional bituminous built‐up roofs, concrete, metal, aged galvanized
metal,bondedtarandgravelandasphaltshingles. DonotuseSiliconizeronEPDM(Rubber)orpolyurethane
foam.
IMPORTANT: Even though Lanco® Siliconizer™ will resist standing water (for 50 hours), do not use on roofs
withaslopelessthan1/2inchperfoot.Ifusedonroofswithslopelessthan1/2inchperfoot,Warrantywill
be void. Roofs with less severe ponding areas and improper drainage will require annual maintenance and
must be re‐coated yearly with an application  of two coats of Lanco® Siliconizer™. Prior to application over
asphalt shingle roofs, the attic area should be very well ventilated (gable vent fan works best) to prevent
condensationontherooforinbetweenthelayersoftheshinglesordecking.
GENERALSURFACEPREPARATION:
1. WashandRinse:Makesuretheroofisclean.Pressurewashtheroofwithamilddetergentandrinse
thoroughly. Remove all dirt, grease and loose particles such as gravel, old coating, etc. Remove any
mildeworfunguswithableachsolutionof2partswaterto1partbleach.Ifneededusealonghandle
withscrubbrush.Rinsethoroughly.CAUTION‐Readbleach warninglabels.Wear rubberglovesand
safetyglasses.
2. Repair:Areas where water may accumulatefor more than 50 hours mustbe corrected by using roof
drainsorotheravailablemeansbeforeapplyingsealer.Iflevelcorrectionsmustbemade,useLanco®
Ultra Level™ self‐leveling underlayment according to label instructions. On any weakened areas of
concretesurfaceusea goodquality  masonry cementmixedwithLanco® BondingAgent accordingto
label instructions.Rusty metal must be cleaned with a wire brush and primed with a rust inhibitive
metal primer before application of this product; we recommend Lanco® Gray Oxide Primer. Replace
anyloosefastenersor screws. Make sure cracks,seams,and flashing are cleanand dry.With a putty
knife, apply Lanco® Siliconizer Crack Filler and Fiber‐Glass Patching Weave over cracks, seams,
flashing,screwsandanyotherstandingobjects.Becertainallsurfacesareproperlyrinsedanddryprior
toapplyingcoating.
3. Prime: In most cases, a primer is not needed. However, a primer is recommended for uncoated
concrete, chalky surfaces or rusty metal. For bare concrete and chalky surfaces,
use Lanco® Clear
AcrylicPrimerSealertosealinternalconcretecracks.Forrustymetal,useLanco®RedOxidePrimeror
equivalent.
4. ASPHALTSHINGLES–Priortoapplicationoverasphaltshingleroofstheatticareashouldbeverywell
ventilated(gableventfanworksbest)topreventcondensationontherooforinbetweenthelayersof
the shingles or decking. Follow proper cleaning and preparation as described above. Be sure all tabs
are completely adhered and sealed. Areas where the existing material has blistered, buckled or
becomewet,mustberemovedandrepairedusingsimilarproductsorsystem.Apply2coatsofproduct
asdirected,allowing24hoursdryingtimebetweencoats.Besurealledgesandgroovesarecompletely
coatedtoensureauniformthickness.Ifany largeholes,dents,groovesorflashingtransitionsremain,
apply Siliconizer Crack Filler and polyester weave on those areas not properly sealed. Allow to
 dry
another 24 hours and apply an additional coat of product to these areas. Additional coats may be
neededinordertoprovideacompletelycoveredanduniformcontinuousfilm.
GENERALAPPLICATION: Applywith aheavynap rolleror airlesssprayer intwo (2)coats; allow24 hoursdry
timebetweeneachcoat.Applyonlyattemperaturesabove50°F.Donotapplyiftemperatureisexpectedto
dropbelow50°Fdegreesbeforethecoatinghascompletelydried.Donotapplyifroofsurfaceisabove95°F.If
roof is too hot, spray with water to avoid sealer from drying too quickly
 and allow water to dry. Each coat
shouldbeappliedinaperpendiculardirectionfrompreviouscoat;allow24hoursdrytimebetweencoats.Do