I think it is tar. But I am not sure.
The word is daub. It means to coat or smear a surface with a sticky substance in a liberal way.
gel is a 3 letter word for sticky substance.
spread
They contain a sticky substance known as resin.
The sticky organic substance exuded by pine and fir trees is sap or rosin.
tape
Dowb
tar
Honey
mucus
This substance is a latex.
honey and toffee