100% Silicone Roof Coating
RC 32 Series Silicone Coating is a low VOC, high solids silicone roof coating designed to provide a seamless waterproof membrane over top of your existing roof surface.

Available in 5 gallon buckets.

Click here to see coverage rates for this product.

SKU: RC32 Category:

Basic Uses & Description

Home-Sil RC 32.00 Series Roof Coating is a solvent-free, silicone roof coating made of one-component. It is a moisture curing, silicone rubber roof coating system designed to adhere to many different roofing systems. This coating can be sprayed or roll-applied. For residential applications, we recommend roll-applying.

This system resists weathering, aging, oxidation, wind-driven sand, rain and snow, the effects of ozone, UV radiation, and the temperature extremes typically found on roofs. Home-Sil RC 32.00 Series Roof Coating can be applied in very thick coats without blistering, and still maintains maximum adhesion.

Composition and Materials:

Home-Sil RC 32.00 Series Roof Coating is a dispersion of silicone rubber. The coating is one-part and ready-to-use out of the bucket. It can be easily applied to a dry, frost-free surface. It cures in 1-4 hours at a normal temperature simply by interacting with moisture in the air. Cure time will be extended in areas with lower than normal humidity levels.

Packaging Information:

Home-Sil RC 32.00 Series Roof Coating is available in 5 gallon containers.

Instructions for our High Solids Silicone Roof Coating vary greatly depending on the substrate being applied to. Select your substrate for specific instructions below:

Built-Up or Modified Bitumen
PVC, TPO, or Hypalon
RV, Camper, or Mobile Home

If you prefer to watch rather than read, we also have instructional videos below:
Built-Up or Modified Bitumen

What coverage rate should I use for RC 32.00?
Coverage rates vary greatly depending on the substrate being coated. Please review the instructions for your specific substrate to find the proper coverage rates.

How much acrylic coating do I need for the same job done by silicone coating?
This answer varies greatly depending on the substrate being coated, but a good estimate is twice as much acrylic as silicone roof coating for the same job. Acrylic requires a primer coat, a base coat, and one to two top coats at 1 gallon/100 sq. ft.

How does RC 32.00 series compare to acrylic roof coatings?
Silicone is superior to acrylic in four key ways. 1) Prep times are much shorter for silicone, and once installed they can cure up to 80x faster than acrylic. 2) Water based vs. Silicone based. Acrylic coatings are water based, and therefore they cannot resist the elements and ponding water like silicone can. 3) Wash-off is a problem for acrylics. They are an evaporative cure product, and run a high risk of wash off shortly after installation. Silicone does not face this same problem because it is moisture-curing. 4) Silicone is the lowest VOC roofing product on the market, 4-8 times less than acrylic VOC content. Silicone lasts longer, and never needs to be replaced, only reapplied. That longer life-cycle leads to a much lower environmental impact. Check out our blog post here for a more thorough explanation of each factor above.

What substrates can I use RC 32.00 on without a primer?
RC 32.00 can be applied over concrete, modified bitumen, single-ply, metal roof panel, and smooth BUR without a primer.

How should I apply RC 32.00?
RC 32.00 can be spray-applied or rolled on. We recommend rolling the material for smaller residential applications. The roller should be nap resistant.

What colors is RC 32.00 available in?
RC 32.00 is available in 4 standard colors and 8 custom colors. They are white, tan, gray, light gray, hunter green, barn red, colonial red, black, dark brown, regal blue, slate blue and burnt orange. See our Color Guide for swatches and product numbers.

What is the skin on top of the RC 32.00 container?
This skin is the result of the RC 32.00 coating beginning to cure in the pail. Silicone is moisture-cured, so high heat and humidity will cause the product to skin. If surface skins, remove skinned material from container. To minimize skinning over several days, pour a thin layer of 100% mineral spirits on top of product until it is completely covered and do not move pail until ready to reuse. When ready, stir thoroughly with a power mixer. Keep container tightly closed between applications to minimize surface skinning.

Is there a mildicide in this material?
There is no mildicide in our roof coating because mildew does not grow on the surface of our silicone products. Unlike acrylic coatings, our coatings are inert and do not provide a food source for mildew or mold.

Can I pressure wash this product?
All of our products can be pressure washed at a low power setting (<2,500 psi) once installed and cured.

Does this product have a UL approval rating?
All of our products are UL rated when installed on a non-combustible surface.

Can this product be applied to walkways?
This product can be applied to walkways. However, silicone coatings become very slippery when wet. It is recommended that a walkway be installed (yellow spaghetti, plastic or metal grating) before heavy use begins.

Can this product be used on a peaked roof?
Our roof coatings have been specially formulated to decrease “run-off” once applied. This means that, yes; our products can be applied to peaked roofs and still maintain their integrity.

Since both coats are the same color, how can I see where to apply the second coat?
If you are applying to a substrate that requires two coats, you may consider purchasing two different color coatings (one for the base coat, one for the top coat). If that is not an option, simply use chalk lines to mark out 100 sq. ft. at a time and apply the coating that way.

Which primer is right for which surface?
P-110 is designed for use over concrete, wood, fiberglass, steel, galvanized and aluminum surfaces, and metal. P-120 is designed for use with elastomeric coatings and TPO membranes. P-130 is designed primarily for metal but can also be useful for wood, metal, concrete, masonry, various single ply membranes, SPF and most common roof coatings. P-150 is designed for PVC and TPO membranes.

How should I clean up afterwards?
Use normal precautions to avoid getting the product on your skin (wear long pants, socks, long sleeves, and work gloves). If you do get product on your skin, you can scrub it off with soap and water. Product will not come out of clothing or shoes. Clean any tools and equipment after application with 100% mineral spirits and a rag.

How should I dispose of this product when finished?
All of our products are inert, which means they are fine to be thrown away in your regular trash. However, your locality may have certain regulations related to the handling of materials such as ours; be sure you consult your local laws and dispose of our products in an appropriate manner.

How do I check that I am applying at the correct coverage rate?
We have mil gauges available to check your coverage thickness while you are working.

How long should the material sit before being walked on?
Most of our products cure in less than 24 hours, but to be safe you should wait 24 hours before walking or placing equipment on the freshly applied product. This rule also applies to adding a second coat.

Got more questions? Contact us!

Product Information