SKU: 99275124334

GAF Silicone Mastic, White — 3.5 Gallon Pail

$94.13 $104.59
Save 10%
No.2 Bestseller on lamcf.fr >

Pay in installments of $26.15 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 9 - Aug 14

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

GAF Silicone Mastic, White — 3.5 Gallon PailGAF Silicone Mastic Sealant, White (3. 5 Gal) Professional grade, thick silicone mastic designed for flashing and detail work. Low odor, fast moisture cure formula adheres strongly to a wide range of roofing substrates. Key Features: High Build Silicone Sealant: Thick consistency for robust coverage on seams, penetrations, and flashing details Easy Application: Low odor and smooth tooling help speed installs on the jobsite Fast Moisture Cure: Cures

GAF Silicone Mastic Sealant, White (3.5 Gal)

Professional-grade, thick silicone mastic designed for flashing and detail work. Low-odor, fast moisture-cure formula adheres strongly to a wide range of roofing substrates.

Key Features:

  • High-Build Silicone Sealant: Thick consistency for robust coverage on seams, penetrations, and flashing details
  • Easy Application: Low odor and smooth tooling help speed installs on the jobsite
  • Fast Moisture Cure: Cures quickly to reduce downtime and return roofs to service faster
  • Strong Multi-Surface Adhesion: Formulated to bond to a variety of common roofing substrates
  • Tested Performance: Meets ASTM D1644, D2697, and D2370 standards

Specifications Table:

Specification Details
Color White
Package Size 3.5 Gallon Pail
Item Weight 42 lb
Standards ASTM D1644; ASTM D2697; ASTM D2370
Manufacturer Number 891402WH
Product Number GAFSM35WH
Category Adhesives, Caulks & Sealants
Description A thick, high-build silicone sealant featuring low odor, easy application, fast moisture cure, and enhanced adhesion to a variety of substrates.

Frequently Asked Questions (FAQ):

Q: What is the color of this silicone mastic?
A: White.

Q: How much product is in the container?
A: 3.5-gallon pail.

Q: What standards does it meet?
A: ASTM D1644, ASTM D2697, and ASTM D2370.

Q: Where is it typically used?
A: For flashing, seams, penetrations, and detail repairs on compatible roofing systems.

Q: Does it have strong odor?
A: No—it's a low-odor formula for easier application.

Sculpted Protection with a Clean, Architectural Finish

This silicone mastic draws a crisp, modern line around roof penetrations and edges, bringing order and polish to functional details. I love the dense, high-build body—it lays down with confidence and dries into a sleek, resilient skin. Use it to frame flashing and seams with a refined, white accent that feels intentional. It’s a quiet essential—performance-forward and luxuriously reliable.

Seal critical roof details with confidence—choose this GAF Silicone Mastic for fast-curing, durable adhesion that lasts.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 99275124334

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.0 ★★★★★
Based on 10 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
S
Verified Purchase
sheila b.
West Palm Beach, US
★★★★★ 4
It does exactly what they say it does! Worth the money
Color: A1-Red
It arrived quickly. It’s a fun toy! It’s the right size for cats. Definitely worth the money. It is exactly as described. So far, the quality seems very good and it seems durable. The instructions are on the side of the box, which makes learning how to operate it easy. I love it that it’s red, because my kitty seems to be attracted to red. My kitty is very interested in it, yet isn’t quite sure what to think of it. I love that it changes directions on its own so that it doesn’t get stuck or lost under furniture, which is typical for a ball that cats play with. It seems to only go two, three or four feet in one direction and then it changes directions, which is both good and bad. I just wish it would go farther in one direction before changing directions so that my kitty could chase it farther, as we have plenty of space in our house for her to run. But that certainly could be a plus for other cats, enjoying not knowing where the ball is going to go next and really keep them on their toes.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 20, 2026
O
Verified Purchase
Olcay
Phoenix, US
★★★★★ 5
Cat loves this
Color: A1-Red
This toy is great for keeping pets entertained. The ball moves quickly and the tail makes it even more fun for cats to chase. It’s rechargeable and easy to use, and my pet stayed interested much longer than with regular toys.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 15, 2026
R
Rich Loss
Lake Worth, US
★★★★★ 5
A Great Energy-Burner for High-Drive Pups!
As the owner of a high-energy dog, finding something that keeps them occupied for more than five minutes is usually a massive challenge. The LDZ&CHX Smart Interactive Dog Toy has been an absolute lifesaver for our daily routine. What I Love About It: True Boredom Buster: The moving and rolling action is erratic enough to mimic prey, which immediately hooks my dog’s attention. It does a fantastic job of keeping them busy and mentally engaged when I'm tied up with work. Smart Design: The inner ball provides the movement, while the outer blue cage-style sleeve makes it incredibly easy for dogs to grab, carry, and chase without getting their jaws stuck. Eco-Friendly & Wallet-Friendly: Thank goodness it's rechargeable. I am so tired of buying endless packs of AA batteries for moving pet toys, so being able to just plug this in is a massive plus. Things to Keep in Mind: The "Bite-Resistant" Sleeve: While the outer sleeve is durable, I wouldn't leave a notorious heavy chewer unsupervised with it for hours. It works beautifully as an interactive chase toy, but it shouldn't be treated as a pure, indestructible chew bone.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 11, 2026
L
logan zaske
Dallas, US
★★★★★ 4
Great toy for dogs, cats, or even children!
I got this for my dog, but she was completely uninterested. (I'm sure there are tons of dogs who would love it, mine just happens to not.) But a friend came over with her toddler son, and he absolutely loves it, so I gave it to him. It's a pretty fun little ball and vibrates strongly enough to make itself roll around in random patterns on the floor. It also lights up as it does so, and looks pretty cool! The build quality seems to be pretty good, the outer rubber cover is pretty durable. Though some dogs will probably make quick work of tearing it up, as it has a large opening for the ball to come out. And the USB-C charging is a nice feature as well, but you have to remove the ball from it's sleeve and unscrew it to charge it. As for value, I think it's not a bad deal overall, and would recommend it for small/medium dogs, cats or children! It's well worth the price for the amount of entertainment it will provide! As always if I encounter any other issues or think of anything else to add I'll update this review!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 12, 2026
J
Jen
Dallas, US
★★★★★ 5
Puppy-Approved Entertainment
Oh my gosh, my puppy absolutely loves this toy. Out of all the toys we’ve brought home recently, this one may have become her favorite. She chases it around the room, pounces on it, carries it around, and then does the funniest thing—she’ll bring it back to her bed and just hold it in her mouth while it vibrates. I’m not sure if she’s soothing her teething gums or if she simply enjoys the sensation, but she seems completely fascinated by it. It’s honestly pretty entertaining to watch. The unpredictable movement keeps her engaged much longer than many of her other toys, and it does a great job encouraging active play. For a puppy with endless energy, that’s a big win. The outer sleeve has held up well so far, and I appreciate that the toy is rechargeable instead of constantly needing replacement batteries. If you’re looking for a toy that can keep a curious puppy busy and provide some laughs for the humans watching, this one has been a hit in our house. It’s getting a lot more playtime than most of the toys in her basket.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 8, 2026

recommand products

Athena Needle Bearing 18x22x21.8
14.95
Athena 14-15 Beta RR 350 4T Complete Gasket Kit (Incl Oil Seals)
154.47
Athena 09-10 BMW G 450 X 450 Oil Filter
18.95
VINHO DO PORTO - KOPKE COLHEITA 2003 WHITE
74.20
Athena 78-87 Suzuki TS X 125 14x18x20mm Needle Bearing
14.95