... as glass, coated glass, ceramic tiles, enamel, painted surfaces (wood and other), aluminum, steel and many plastics. In some cases ... , metal and plastic substrates require priming before JOINLEADER 688 Aquarium Silicone Sealant is applied.APPLICATION LIMITS JOINLEADER 660 Large Plate ... all surfaces that bleed oil, plasticizers or solvents such as wood immersed in oil, oil crack filler, and some uncured ...