can this be used to seal copper duct?

I would use it myself but a lot depends, size of gap to be filled,( may have to layer it on. ), is it going to be subject to extreme temps, which should not be an issue. We use it at work to adhere rubber seals onto airplane wings. This stuff is tough. I bought some for home use in all 3 colors, have used the white, we use clear at work. Haven't tried the black. But if anything will seal it, this stuff is premium quality. Depending on area temp, this needs to be in place rather quickly, don't start and then go to bathroom. Average temp will give a 3 to 5 minute window before starting to set. Practice on a small piece first to get idea of set time to work. Clean area to receive sealer with acetone or vinegar. Not sure which would be best, experiment. Will it stick to copper? I just don't know, but can say this is the best sealer I've ever used and the airline industry uses it, just not on copper.

yes, there is an odor of acetic acid, (vinegar like smell)

I'm looking for a mold resistant shower caulk. is the the best there is out there?

We recommend Dow Corning 786. The color white is sold singly, in packs of 3 and 6 and in a case of 12 cartridges. Please search for the following ASIN numbers within Amazon..B00VP70XJA, B01ATLTZ6O, B012B34SDS, B012B0Q5PK Thank you, PK Supplies, Inc.

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Dow Corning 732 Multi-Purpose Silicone Sealant - White, 10.1 Ounce

Product ID: 16886847

Details

Brand
Corning
Item Weight
300 g
Item dimensions L x W x H
11.61 x 1.89 x
Material
Rubber
Style
Compact

💧Waterproof & moisture-cure

🌡️Wide temp range -60°C to +180°C

🛠️One-component, easy application

S/.128

Duties & taxes included

In stock

Sold byAmazon PeruDelivered 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 Peru.

Secure transaction

Description

🔧 Seal Smart, Live Bold: The Ultimate Multi-Surface Shield

DURABLE FLEXIBLE FINISH - Non-sag paste cures into a tough yet flexible rubber, ensuring long-lasting protection without cracking or peeling.
CERTIFIED QUALITY SAFETY - Backed by MIL-A-46106 and FDA 177.2600 compliance, guaranteeing industrial-grade reliability and peace of mind.
EXTREME TEMPERATURE RESILIENCE - Stay confident with a sealant that flexes from freezing -60°C to scorching +180°C, perfect for any environment.
EFFORTLESS ONE STEP APPLICATION - Simplify your projects with a single-component sealant that cures on contact with air moisture—no mixing, no mess.
UNIVERSAL SURFACE COMPATIBILITY - Seal and bond glass, metal, ceramic, wood, plastics, and more—versatility that keeps you ahead of the curve.

Dow Corning 732 Multi-Purpose Silicone Sealant is a premium white, one-component adhesive that cures at room temperature via an acetoxy moisture cure system. It offers exceptional flexibility and durability across a wide temperature range (-60°C to +180°C), bonds to diverse materials including glass, metal, and wood, and provides waterproof protection. With industrial certifications and a 900-day shelf life, it’s engineered for professionals demanding reliable, long-lasting seals.

Specifications

ASIN	B008R14R08
Best Sellers Rank	#160,778 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #286 in Silicone Adhesives
Brand Name	Corning
Color	White
Compatible Material	Ceramic, Glass, Metal, Non-oily Woods, Painted Surfaces, Plastic, Porcelain, Rubber
Customer Reviews	4.8 4.8 out of 5 stars (58)
Item Dimensions	11.61 x 1.89 x 1.89 inches
Item Form	Paste
Item Weight	300 g
Manufacturer	Dow Corning
Material Type	Rubber, Silicone
Model	1892118
Number of Items	1
Number of Packs	1
Part Number	1892118
Style Name	Compact
Surface Recommendation	Wood
UPC	077472131419
Unit Count	1 Count
Water Resistance Level	Waterproof

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

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.

1 day ago

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

S/.128

Duties & taxes included

In stock

Sold byAmazon PeruDelivered 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 Peru.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

View all Trustpilot reviews