Professional Grade Silicone Sealant SS 300 Series
SS 300 Series is a 100% silicone, low VOC roofing caulk designed to make small repairs and prep joints and protrusions for roof coating application.

Available in cases of 12-10.0 fl. oz. tubes.

SKU: SS 300 Category:

Basic Uses & Description:

Home-Sil SS 3.00 Series Seam Sealant is a silicone sealant designed for roofing applications, repairs, and various joint applications.

Weather Restrictions:

Home-Sil SS 3.00 Series Seam Sealant should not be applied when temperatures are below 20°F or above 120°F.


Home-Sil SS 3.00 Series Seam Sealant is available in cases of twelve 10.0 fl. oz. cartridges.


1. Do not cut open until ready for use. Plug cartridge when not in use.
2. Ensure surface is clean, dry and free from foreign material.
3. If surface must be cleaned, use solvent procedure or mechanical means.
4. Do not use soap or detergent and water to clean.
5. Cleaning of all surfaces should be done on the same day on which the sealant is applied.
1. Cut nozzle at 45 degree angle to desired bead size then load cartridge into caulking gun.
2. Apply sealant onto the substrates to be sealed. Sealant will flow onto the substrate surface and into cavities of narrow joints.
3. Remove excess sealant before sealant is cured.
1. Do not apply when surface temperatures exceed 120 degrees.
2. Store below 90 degrees.

How does this material compare to acrylic caulking sealants?
Silicone is superior to acrylic in four key ways. 1) Prep times are much greater for acrylic, and once installed they can take up to 80x longer to cure than silicone. 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.

How do I know if I need a primer?
Our caulking adheres to most substrates without a primer, and we’ve worked hard to make it so. It will adhere to all surfaces our coating does, so you can use the coating as a guideline for the caulking.

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

What colors is this material available in?
Our caulking is available in White, Tan and Gray.

Is there a mildicide in this material?
There is no mildicide in our caulking because mildew does not grow on the surface of our silicone products. Unlike acrylic products, our caulking is inert and does 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 fully cured.

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

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, and therefore will create no issues when disposed of in your regular trash pickup. However, you should consult your district’s policies and ensure you comply with any disposal regulations.

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Product Information