Easily repair damaged gutters or adds durability to new installations with the Amerimax SeamerMate 10 oz. Gutter Sealant. This strong sealant has a tri-polymer based formula that is semi-self leveling. SeamerMate can be applied underwater and contains a strong holding power. The sealant is also UV resistant and perfect for most types of metal-to-metal sealing
Use to seal all gutter connections in new or damaged gutters
Compatible with most types of metal-to-metal sealing
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Product Depth (in.)
Product Height (in.)
Product Width (in.)
Gutter Sealant Type
Product Weight (lb.)
Roofing Product Type
Warranty / Certifications
Limited Manufacturers Warranty - Free from defects in materials and workmanship
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out of 137 reviews
83%recommend this product
Showing 1-10 of 137 reviews
Jul 7, 2019
So far so good, has prevented the water from leaking, used on seam where I attached an old gutter...
So far so good, has prevented the water from leaking, used on seam where I attached an old gutter to a new one. It also fixed a leak in another area of the gutter in which I applied the sealant, put a little piece of screen on it (like when patching a roof) then put sealant over that piece of screen and it worked.
4 found this review helpful
Jun 1, 2022
Does the job
Very good polymer based sealant for gutters. So far so good regarding the repair I did
May 12, 2022
Does not last long
Northern Minnesota….with cold winter temps and warm to hot summers….(sometimes). So temps vary and 3 years later seams ALL leak. Now what!?!?!
Apr 27, 2022
This is a good product for sealing leaking gutters....
This is a good product for sealing leaking gutters.
Apr 5, 2022
Apr 5, 2022
Jan 2, 2022
not in cold
The temperature dropped from 56 to 30 degrees overnight; I should have tried to seal the leaking corners before the cold front arrived. The sealant did not flow out of the tube and did not stick to thr aluminum at 30 degrees.
Dec 24, 2021
Useless! Don’t waste your money
I don’t know if the tube i bought was defective, but it did not work. I punctured and repunctured the nozzle several times, but I could not push out the sealant. For a second, I then thought my caulk gun was broken. The sealant began dripping from the back of tube because I was squeezing so hard. Expensive product to completely useless
Gibraltar 10 oz. silicone gutter sealantGibraltar 10 oz. silicone gutter sealant is ideal for gutter assembly or repair. This clear silicon sealant cures quickly and remains flexible enough to move with the expansion and contraction of the gutter. Sold in 10 oz. caulking gun cartridges.View Full Product Description