Model # RC200-2

Internet # 100428968

Store SKU # 212517

5 Gal. Siliconizer Elastomeric Sealer

  • Modified with silicone to make it waterproof and flexible
  • Offers years of protection for various roof substrates
  • Ideal for sealing surfaces against leaks and moisture

Frequently Bought Together

Product Overview

Lanco Elastomeric Styrene Acrylic Resin sealer modified with Silicone, which makes it waterproofing and highly flexible, for sealing surfaces against leaks and moisture. Designed for concrete roofs, metal, wood, asphalt membranes, polyurethane, EPDM, and TPO. May be applied with roller, brush, or spray - airless.

  • Reflects sun rays
  • Reduces interior temperature
  • Protects against moisture and leaks
  • Easy to keep clean
  • Can be reinforced with polyester o fiberglass mesh
  • Drying time: 30-60 min. to touch, 2-4 hours to recoat (79˚F (26˚C) and 85% RH)
  • Coverage: 50 sq. ft. (4.6 square meters) per gallon (32 wet mils, 17.5 dry mils)

Info & Guides

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Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 


Coating Base 
Coating Consistency 
Color Family 
Commercial / Residential 
Commercial / Residential 
Container type 
Dry Time 
4 h 
Fire Rating 
Class A (over non-combustible substrate) 
Roofing Product Type 
Roof Coating 
Surface Recommended 
Protects and waterproofs a wide variety of approved roofing systems and/or substrates, including conventional bituminous built-up roofs, asphalt, aged metal, wood, concrete, and asphalt shingle roofs. DO NOT USE on EPDM (Rubber) or polyurethane foam. 

Warranty / Certifications

ENERGY STAR Certified 
Manufacturer Warranty 
Lanco warrants only that this product is free of defects, since many factors which affects the results obtained from this product (such as weather, workmanship, equipment used and prior conditions of substrate) are beyond our control. We will replace at no charge any product proven to be defective within 10 years of purchase, provided it has been applied per manufacturer’s specifications. 

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Customer Questions & Answers

2 Questions1 Answer

Customer Questions & Answers

5 Gal. Siliconizer Elastomeric Sealer
5 Gal. Siliconizer Elastomeric Sealer

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I have a 2,000sf flat roof to cover....when the product label says 50sf per gal coverage, does that mean it will cover 2 coats or just 1.

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tampa fl
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September 23, 2015
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Answer (1)

January 15, 2016
This product will cover 50 square feet per gallon with two coats.
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Can i apply this over galvanized metal decking and should I apply it while the decking is new or wait till it has aged a little?

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south florida
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November 10, 2015
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Customer Reviews

Rated 3.7 out of 5 by 6 reviewers.
Rated 5.0 out of 5.0 by Great roof sealer Use on75 yr old concrete barrel tile roof. Seals it great and looks good too. We apply with cheap I string mops. Gets in all the cracks and crevices better and faster than a roller or brush. March 27, 2015
Rated 5.0 out of 5.0 by worked better than I thought I put a new roof on in 2008. I researched this product alot, talked to contractors, etc, because I wanted to seal the exposed openings of the shingles.After two coats it looks obvious why in Hurricane country (Fort Myers, FL ) Caulked all opening and with same brand Caulk (flexible to heat and cold)Added 2 more coats (to seals where I caulked) and it has lasted 3 years and no problems. Cool to the touch and attic is much cooler.Must (lightly) pressure wash cause of MOLD after 3 years. I'm putting another 1 coat on because the cracks that I did'nt seal have become exposed alittle bit. I read a guy used sand for area's that puddle up. Part of my Flat roof does puddle up,Worth a try!!! September 6, 2012
Rated 1.0 out of 5.0 by Roof coating woes I recently plied the elastomeric roof coating in hopes of reducing my energy costs on my home. Product applied fairly easily....but tacked up too quickly when rolling it out on a asphalt shingle roof. Then about 1 hr after i finished the last roll stroke..the afternoon rain storm came and my roof coating (water soluable) leached and turned my surrounding yard into puddles of milky white roof coating..... I sure hope it dries today. As far as energy usage? the roof/attic feels cooler....but time will tell when I get the electric bill. June 29, 2009
Rated 4.0 out of 5.0 by Good product It does what it says. Haven't yet given it enough time to see if it saved me money on electricity. As long as you watch the weather forecast and give it enough time to dry, you won't have a problem with it dripping all over the place. My advice, buy some pizza and beer and invite buddies to come help... its a boring task to apply it, and dividing it among 3 or 4 friends helps out alot... oh, and don't forget the sunblock... May 1, 2012
Rated 2.0 out of 5.0 by reflective use only This product has good reflective capability. However, it is more of a paint like product and does not provide the sealing capabilities of the asphalt based products. I recommend it only be used on new roofs to reduce heat build up. May 22, 2012
Rated 5.0 out of 5.0 by The product is amazing. I have a 12,000 square foot roof and just used forty five-gallon buckets coating my roof. I have used a similar product for the past 17 years, but nothing comes close to this product. In the past every time it rained, I became agitated and could not sleep worrying about water damage to ceilings from the leaking roof. Now, due to this product, I look forward to the rain; the harder the better. Although no one has approved the method, I have found that by adding sand to the product, I can create a flexible patch that fills small dips in the roof that tend to hold water and cause damage over time. I found I can build up areas around vents and air-conditioning stands also by adding play sand. I add sand until the product forms a thick paste, then I trowel it on. Let dry a few days then paint over with a final coat without sand. Overall I paint three coats in areas where water tends to stand for a few hours and two coats on the rest of the roof. I have tried everything on my roof in the past and this is the only product that works without peeling eventually due to some persistent standing water. I am slowly working on filling all low areas with the sand method then re-coating. Originally I was going to only use the product on the wettest areas then use a cheaper product on the remaining, however, I discovered that I got a superior coverage by this product that actually saved me money. Last time I coated the roof it took 60 five-gallon pails with another brand. June 7, 2012
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