This is the best aquarium safe silicone on the market.Safe for all fish, reptiles and amphibians and arachnids.This is a non-slump sealant and can be applied to vertical surfaces without flowing or sagging. Withstands constant operating temperatures from -57°C to +233°CNot affected by humid or moist conditions.Wont dry out/split or crack.This Professional-Grade silicone is of the purest and highest quailty and wont break down as fast as others and will last decades. Comes Black or Clear.
