GESilPruf SCS2002 Silicone Sealant - 10 Oz Cartridge, White (Single Tube)

Used this to seal a large window (5' wide) on a 39 foot sailboat. I have tried numerous sealants on this window and they all start leaking within a few months. This lasted the whole season. This window flexes a lot since it is on a boat that is constantly undergoing different loads while sailing. Redoing this after hauling the boat out for the winter to ensure another dry season, but the sealant I pulled out of the window looks like it is brand new, still super flexible and mildew free! Highly recommended.

SCS2000 is pricey silicone sealant adhesive but it is without doubt a superior product. I learned about it from a structural engineer when I was researching the best adhesive to install a loose piece of Corian tile in a custom shower stall. I needed something that would cling tenaciously yet be completely impervious to water. He recommended SCS2000. This is the stuff that they use to seal glass on 100 story sky scrapers. It remains flexible even when cured so is suitable for temperature extremes indoors or out. The brand is GE who developed the product decades ago when it was a industrial conglomerate. The adhesives group was spun off and is now owned by another entity but they've kept the original specs and brand name. If you just need silicone sealing/caulking this stuff is overkill but if you need the features of silicone with great adhesion properties SCS2000 is the one to get. I am aware that there are other "silicone adhesives " out there but most don't come anywhere near the gripping power of this product.

Worked very well on my airplane windows where all other caulks hardened and discolored. This is bright white and stays a bit supple.

Good stuff. Used to seal chain plates on sailboat. Works great doesn’t get hard.

Good sealant