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Your cart is empty.ASI 502 is a 100% RTV Silicone that is UL & NSF Recognized. ASI 502 is a one-part, moisture-curing RTV (room temperature vulcanizing) silicone that cures to a strong, silicone rubber that maintains long-term durability and flexibility. ASI 502 100% RTV Silicone is a non-slump sealant and can be applied to vertical or overhead surfaces without flowing or sagging. Because ASI 502 is a 100% RTV silicone sealant, it has excellent resistance to weathering including ozone, ultra-violet radiation, freeze-thaw conditions and airborne chemicals. Fully cured, ASI 502 has excellent adhesion to glass, metal, porcelain, ceramic, wood, most plastics and many other nonporous substrates. ASI 100% RTV Silicone (ASI 502) can be applied to surface temperatures from -18°C to +50°C (0°F to +120°F) and after curing, withstands constant operating temperatures from -70 to +400 degrees F. Typical Uses: ASI 502 is an excellent sealant and/or adhesive for many applications where a long-term, permanently flexible bond or seal is required.
SHANE BERTHELOT
Reviewed in the United States on February 1, 2025
Sealant works good and drys overnight
Warrior_joe
Reviewed in the United States on August 7, 2024
This finishes shiny black. The calk is similar to GE or any other silicone. Those that say it is hard to use, never used pure silicone before. Yes, I would definitely buy this product, if i needed shiny black silicone calk. Worked great for me
Dale Caskanette
Reviewed in Canada on June 10, 2024
I had an old pan that the handle cracked on. Thought this hi temperature silicone might work for a repair. Handle is once again secure and have ran pot through dishwasher several times and silicone looks like new
ClanMacLaren
Reviewed in the United States on May 22, 2024
I had to seal up some lighting junction boxes I installed on my porch that would be exposed to rain. The boxes were black and I bought this primarily because it was black as well. But it also was easy to apply and dried quickly and yet stayed flexible.
Brian
Reviewed in the United States on December 1, 2024
I bought this to seal the backs of fog lights that I bought for my Honda Element. These fog lights were known to get moisture on the inside. So far this sealant has worked well to keep the moisture out. I like that the color is black.
MCR
Reviewed in the United States on November 19, 2024
Application very easy.
cliffordo
Reviewed in the United States on November 13, 2024
Works well but small tube.
John mccants
Reviewed in the United States on April 9, 2024
It’s a good silicon, but it takes a long time to set up and when it dry, it turns gray, which was not my cup of tea
Randall W. Rasner
Reviewed in the United States on December 14, 2023
I ordered this to use on 2 cigarette lighter (power points) that I replaced in an older vehicle. The replacements were supposed to be OEM fits, but were not, and would not stay in the receptacle holes in the dashboard. I got this to put around the lips of the receptacle holes and then braced some wood against them while the adhesive initially cured. So far, this has done what I expected. The only drawback is the curing times. Initial cure/set time is 24 hours. Final cure is 7 days! I did mine one at a time so that I could allow the complete week to cure. These seem to hold well (so far anyway). It is a messy product. I had to keep some rubbing alcohol and paper towel handy to clean excess and any accidental applications to adjacent areas. The consistency reminds me of Permatex. So far, the cap kept the stuff permeable and liquid enough from using it the first time, and after a week. I don't know how well it will keep it from hardening inside the nozzle over time. It was reasonably priced for as well as it has worked.
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