Can this be used to seal cracks in existing cement between Boiler and Chimney?

Hi, you most certainly can. If you need something with a higher heat rating and the red color isn't an issue, we also make a Hi Heat Red Silicone that is good to 600 degrees. I have posted that link for you below. Thanks! https://www.amazon.com/Red-Devil-08090I-Resistant-Silicone/dp/B009EC5ELK/ref=sr_1_1?keywords=RED+DEVIL+08090I&qid=1579040983&sr=8-1

Can i use this to seal on the wall around the dryer vent hose is?

Yes, no problem, just be aware the item is not paintable. Thanks!

Is this 100% silicone?

It doesn’t say so on the tube but I believe that it is 100% silicone. I used it to caulk around a new fireplace chimney cap due to the high heat from the fireplace smoke when it’s burning. It should be great since it’s exposed outdoors year round

I will not be using this in automotive environment but rather in a diy project. sealing the edges of a metal box with antifreeze to leak proof work?

Hi, yes, it will then work, I just wanted to make sure it was not being used in a car engine. Thanks!

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Red Devil 089650 Extreme Temperature HVAC/R Silicone Sealant, 280 ml, Aluminum, 1 Pack, Made in USA

Red Devil 089650 Extreme Temperature HVAC/R Silicone Sealant, 280 ml, Aluminum, 1 Pack, Made in USA

Product ID: 36499957

Details

Brand
Red Devil
Color
Aluminum
Item Form
Paste
Item Weight
11.52 ounces
Liquid Volume
280

🔥Temp range -60°F to 400°F

🔩Adheres to 7+ surfaces

🛡️Permanent flexibility, no cracking

14917CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

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Description

🛠️ Seal the deal with Red Devil – where extreme temps meet unbreakable bonds!

DURABILITY THAT LASTS - Engineered to never crack, peel, or shrink—your seal’s forever armor.
MULTI SURFACE MASTERY - Bonds seamlessly to metal, aluminum, glass, vinyl, and more—versatility that sticks.
MADE IN THE USA QUALITY - Crafted domestically with premium materials for trusted performance.
WEATHERPROOF CONFIDENCE - Creates a waterproof, weather-resistant barrier that flexes with the elements.
EXTREME TEMPERATURE RESILIENCE - Withstands brutal temps from -60°F to 400°F for HVAC/R reliability.

Red Devil 089650 Extreme Temperature HVAC/R Silicone Sealant is a high-performance, weather-resistant sealant designed specifically for HVAC and refrigeration applications. It offers exceptional adhesion to multiple surfaces including metal, aluminum, and glass, and remains flexible and durable across a wide temperature range from -60°F to 400°F. Made in the USA, this 280 ml aluminum-colored sealant ensures a long-lasting, waterproof seal that resists cracking, peeling, and shrinking, making it the go-to choice for professionals seeking reliable, extreme-condition sealing solutions.

Specifications

ASIN	B011JJ89OY
Best Sellers Rank	#8,349 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in High Temperature Caulk #70 in Industrial Sealants
Brand Name	Red Devil
Color	Aluminum
Customer Reviews	4.6 4.6 out of 5 stars (768)
Global Trade Identification Number	00075339089651
Item Form	Paste
Item Type Name	Extreme Temperature HVAC/R Silicone Sealant
Item Weight	11.52 ounces
Liquid Volume	280
Manufacturer	Red Devil
Material Type	Rubber
Model	089650
Number of Items	1
Number of Packs	1
Part Number	089650
Surface Recommendation	Tile
Tensile Strength	500 psi
UPC	075339089651
Unit Count	1 Count
Water Resistance Level	Waterproof

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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14917CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Senegal.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

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Perfect platform for hard-to-find items. Delivery was prompt.

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