Model # RC905-2

Internet #202086637

Store SKU #548821

Lanco 5 Gal. Ultra-Siliconizer Roof Sealer


5 Gal. Ultra-Siliconizer Roof Sealer

$89.90 /pail

Frequently Bought Together

Product Overview

Lanco Roof and surface Membrane Sealant (Elastomeric Silicone - Acrylic based) for sealing surfaces in a monolithically way. Designed for concrete surfaces, metal, wood, asphalt membranes, polyurethane, EPDM and TPO. May be applied with roller, brush or spray - airless.

  • 78% Solar reflectance
  • 90% Heat reduction
  • Changes color for an easier application
  • Strong finish and high resistance to mildew and dirt
  • Can be reinforced with polyester or fiberglass mesh
  • To use with membrane primer or without it
  • Low VOC volatile organic compounds (50 g/l)
  • 100% Acrylic/silicone technology
  • Coverage: 50 sq. ft. (4.6 sq. m) per gallon (32 wet mils, 17.5 dry mils)

Info & Guides

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Warranty / Certifications

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Customer Questions & Answers

Can it be tinted?

Asked by: steve
Answered by: antonio
Date published: 2016-07-04

What is the coverage per bucket on flat concrete tiles?

Asked by: Tony
I KNOW that concrete tiles will not soak anything up (or very little). We had concrete tiles on the home I grew up in and we "white washed" them every two or three years. I wish we would have had THIS stuff! Unless you have a lot of cracks that will eat it up (and I mean a lot!), you will get at LEAST 50 sq ft per gallon, and probably more (250 sq ft+ per bucket). Someone wrote in their review they got close to 60 (almost 300 sq ft for a 5 gal bucket on a fairly solid roofing material). This stuff is VERY thick and does not soak in unless you have a MUCH softer material like I had. They say it is designed more to adhere to materials (and it SURE does). I put it on 18 year old asphalt shingles and I got 44 sq ft per gal (220 sq ft per bucket) and I put it on thinker, intentionally, too. You will get FAR MORE, for sure, as long as you spread it out as you go and do not let it pool up in sections. Just keep rolling until it won't spread any more, then go back for some more. And MAKE SURE RAIN is not headed your way. I lost a whole bucket and 2 hours work to a FREAK morning rain shower - it got washed off into the gutter. Very depressing. Good Luck!
Answered by: CasualRoofer
Date published: 2016-12-16

Do you sell any product for a leaky sun room ( three season room ) and if not, where can I buy it...

Do you sell any product for a leaky sun room ( three season room ) and if not, where can I buy it? How is it applied if you do sell this type of product? A roofing company wants 1800 dollars to do such a job.
Asked by: Jim
Hi Jim, this item is currently in stock online; however it may be available at your local Home Depot store as there is a listed store SKU number. To determine availability you will need to localize the item online by using a zip code. 1. Localize using your zip code (My Store Location: Change) 2. Choose the store where you want to pick up the item (Make this my Store) If you do not see the store inventory for this item, it is most likely an online exclusive in your region and must be ordered online. We don't provide instructions on installation please reach out to the manufacturer. We appreciate your business and look forward to serving you in the future. Thank you for shopping Home Depot!
Answered by: THDSupport
Date published: 2017-02-13

Can this coating be directly over rusty metal roofing? Following a complete power washing. ..

Can this coating be directly over rusty metal roofing? Following a complete power washing. ..
Asked by: Bill
This can be used on concrete surfaces, metal, wood, asphalt membranes, polyurethane, EPDM and TPO.
Answered by: CommunityAnswer
Date published: 2017-02-15
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Customer Reviews

5 Gal. Ultra-Siliconizer Roof Sealer is rated 4.4 out of 5 by 20.
Rated 5 out of 5 by from Great Product ! It does what it claims to do ! It was recommended by a roofer. Easy to apply. Hig... Great Product ! It does what it claims to do ! It was recommended by a roofer. Easy to apply. Highly recommend !
Date published: 2016-12-13
Rated 4 out of 5 by from Use this product repeatedly for Recoating peoples Mobile... Use this product repeatedly for Recoating peoples Mobile home roof works as easily with the color change
Date published: 2017-01-31
Rated 5 out of 5 by from Facile à étendre. Garantie 15 ans, nous verrons sa fiabilité au cours des prochaines années. Facile à étendre. Garantie 15 ans, nous verrons sa fiabilité au cours des prochaines années.
Date published: 2017-02-14
Rated 4 out of 5 by from used paint roller, easy to cover surface, dried quickly used paint roller, easy to cover surface, dried quickly
Date published: 2017-01-10
Rated 5 out of 5 by from The ONLY One for Asphalt Shingles (and GREAT at it) This was on a 3:12 Sloped Asphalt Tile Roof (18 years old). Someone already said it, but get the MOLD and lose material off of your Asphalt Tile roof. Use a bleach and water mix 10% or 15% bleach and make sure the bleach solution stays on the moldy areas long enough to KILL IT and get rid of it or it may bleed through and possibly affect adhesion. And get all loose material off. Spend several hours with a fairly stiff broom but DON'T BEND or BREAK ANY shingles/tiles (yes, I bent one and snapped it, and glued it back on with a tube of Black Jack I had on hand. Also, I missed cleaning a corner and had to stop since the roller will THROW loose tile facing (sand) in your face, on your clothes and all over everything else. I started with a tray, but DON'T BOTHER. THIS STUFF IS THICKER THAN ANY PAINT I HAVE EVER SEEN! You can't get it on fast enough and it will DRY on the roller before 5 gallons is used - even on cool mornings (I did all work on mornings right after the roof was dried but before it was too hot). I did one 5 gal bucket per morning (took me one week - hey.. I'm 60.. OK? I move slower these days). So I grabbed a 2 quart plastic pitcher and dipped it in the 5 gallon bucket and scraped the sides of the pitcher off with a small squeegee then walked over and poured is out in a line 6" wide across the top and rolled it DOWN the slope of the roof until I got to 8 feet from the bottom and turned around and poured the last lines below (near the edge) and rolled it upward making sure coverage was even and a tad thicker on the edges (I want to keep edge tiles down in the wind). It worked GREAT and I got fairly even coverage - thin enough that I need a second coat on my medium brown colored shingles (I wanted 2, and they recommend 2 anyway), but it was thick enough that the excess seeped down between the tiles for a good seal and even coloring. One of my freshly applied buckets got washed off in a FREAK Rain shower 30 minutes after I applied it. So it took 8 to do 1550 sqft instead of 7 buckets as planned (20% chance of rain my A - -!). 1550 Sq Ft - 7 buckets - 35 gallons. That is 44 sq ft/gal - a bit thicker than the 50 sqft/gal they recommend, but I suspected older shingles would take more, and some would seep and be EATEN between the tiles and I planned for it. I suspect that will even help keep the tiles down in high winds and I checked several and it DOES seep under the edges acting as an adhesive to hold them down, too (that is very good). If it rains within 1.5 to 2 hours, you are going to lose 3 of your 5 gallons into your gutters... get another bucket. I plan to do the next coat across the tiles (perpendicular to first coat) as recommended. Just this first coat literally strengthens the tiles and it does remain a bit flexible and does NOT crack when you walk on it. I am going to add 10 to 15 gallons every year after a soap and water wash down (maybe a small bit of bleach - we shall see). You will need one new 12" ROLLER for every 5 gallon bucket. You may be able to stretch it to two, but it does a number on them. This is some VERY THICK STUFF!! Get this: I can walk on my ASPHALT SHINGLE ROOF AT HIGH NOON, FULL SUN, IN MY BARE FEET! Pretty Cool, eh? (literally... ). And this too: A/C BEFORE Lanco from Noon to 4 PM: 1 HOUR ON, 10 Min OFF (yes, I said ONE HOUR ON). A/C AFTER Lanco from Noon to 4 PM:: 20 min ON, 15 min OFF. I have not seen the first electric bill yet, but that has GOT TO BE SOME BIG BUCKS! Life is good. And I KNOW I added 7 to 10 years to the life of my old roof - maybe more. Pity the roofers when this gets out... Oh..., one bad thing. Since the roof is cooler. The Birds land on it - and DECORATE all over it. But, it does wash off with the rain - unless they have eaten those purple berries. So I get a Polka Dotted roof.... a bit of mild bleach will clean it (I hope). Or maybe I need a scare crow now... FINAL THOUGHTS: HIGHLY RECOMMENDED FOR OLDER ASPHALT SHINGLE ROOFS. VERY HIGHLY!! I have also seen it after about two years on a roof of similar type, and it looks like new (they recommended it to me). Why would ANYONE leave an uncovered asphalt shingle roof with this stuff around? I'll bet it pays for itself in 2 years on just what I DON'T SEND TO FP&L each month! I should have done this 5 YEARS go... (was this stuff around 5 years ago?)
Date published: 2015-09-10
Rated 5 out of 5 by from Reduced kitchen ceiling temps by over 30 degrees My metal strips supporting my drop ceiling in kitchen add on to house would be too hot to touch in the afternoon even with lots of insulation. The AC Was working hard. After first thin coat applied on Labor day, the strips were only about 78 degrees when it was well over 95 degrees outside. It rained about 5 hours later and nothing leeched off the roof. Put on 2nd coat 6 days later, is so white it hurts to look at it even with dark sunglasses. No doubt that my next electric bill will be lower as it no longer runs as long to cool the house. This is over a mostly flat roof wtih a gentle slope that mostly dries quickly after a rain. Next question, should I try it on the Architectural Shingles? The light gray color is getting darker after 14 years. Would definitely help cool the attic.
Date published: 2011-09-12
Rated 5 out of 5 by from Wrong specs, 300 sq. ft. coverage per bucket! The coverage area is not 60 sq.ft., it's actually 60-80 sq. ft. per gallon! You should be able to do about 300 sq. ft. with a 5 gal bucket. Read the PDF guidelines on Lanco's website "Apply the first coat by pouring container of Lanco® Ultra Siliconizer™ onto the roof and spreading at a rate of 2-4 gallons per 120-240 sq. ft.."
Date published: 2011-10-24
Rated 5 out of 5 by from Awesome Product I own a roofing company in the Virgin Islands and we do strictly waterproofing and minor repairs of roofs. We have been using this product for many years now and it is the only water based Acrylic product that we use. When properly applied, according to manufacturer's specs, it forms a superb waterproof membrane on your roof that does an awesome job of repelling water. Best when used on roofs with good drainage and little to no water ponding. Be sure roof is properly cleaned first in order to get a good bond.
Date published: 2013-09-13
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