can this be applied over silicone

Says right on the container: "Remove any silicone with a silicone caulk remover".

Is this a silicone or a rubber-based product? Or something else?

It says it's a co-polymer rubber in one of the descriptions.

Why would this sealant and the through the roof cartridge sealant be "frequently bought together"? Is there a difference in what they do?

I bought the two together so that with the cartridge it could be squeezed into tight fitting cracks. And I bought the stuff in the can so that it could be brushed over to possibly seal anything that was missed with the cartridge. Kind of a double up in order to catch a leak that has been hard to find.

Hi! Can I apply this with a foam brush?

Schmitt, you could over a small area, but the foam will fall apart. a 3 to 4 inch bristle brush is ideal for large areas. My wife has used a 2 inch brush on some seams on her car.

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Through The Roof Sealant, Roof Seal, 10.5 Ounce Cartridge, Clear (Pack of 12)

Through The Roof Sealant, Roof Seal, 10.5 Ounce Cartridge, Clear (Pack of 12)

Product ID: 702646331

Details

Brand
Sashco
Item dimensions L x W x H
21.1 x 16 x
Item weight
10.5 Ounces
Material
Silicone
Style
Cartridge

💧Water & mildew resistant

🌡️Elastic from 0⁰ to 120⁰F

🛠️20x longer lasting than asphalt

$606.56

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Description

🔧 Seal smart, stay leak-free — the clear choice for pros who demand perfection.

UNIVERSAL ADHESION - Bonds tenaciously to metal, wood, ceramic, glass, and more—even on wet surfaces—for versatile, reliable sealing.
CRYSTAL CLEAR FINISH - Goes on transparent and stays clear—no unsightly yellowing or mess, perfect for professional-grade repairs.
READY FOR ANY GARAGE - Won't freeze and is safe to store in unheated spaces, so you’re always prepared for emergency fixes.
UNMATCHED DURABILITY - Lasts 20 times longer than traditional asphalt sealants, ensuring your roof stays leak-free season after season.
FLEXIBLE WEATHERPROOF SEAL - Ultra-elastic formula expands and contracts with temperature swings from freezing to scorching heat without cracking.

Sashco Through The Roof Sealant is a premium clear silicone gel designed for long-lasting, flexible roof repairs. It adheres to a wide range of materials, resists UV damage, water, and mildew, and remains elastic across extreme temperatures. Packaged in convenient 10.5 oz cartridges (12 per pack), it delivers professional, invisible sealing that outperforms traditional asphalt by 20x in durability.

Specifications

ASIN	B00IQCIE0C
Brand	Sashco
Colour	Clear
Compatible Material	Ceramic, Glass, Metal, Wood
Customer Reviews	4.7 4.7 out of 5 stars (116)
Item Dimensions	21.1 x 16 x 30.5 centimetres
Item Form	Gel
Item Weight	10.5 Ounces
Manufacturer	Sashco
Manufacturer Part Number	14010-12
Material	Silicone
Model Number	14010
Number of Items	12
Style Name	Cartridge
Surface Recommendation	Roof
UPC	031525914107
Unit Count	12 Cartridge
Water Resistance Level	Water Resistant

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