Aquarium Mastic Sealants

We stock specialist silicone sealants from brand leaders Dow Corning Geocel, Otto Chemie and Arbo, for use on all aquarium applications. From simple crack repairs in fish tanks to large, sculptured glass block structures and new, decorative 'feature fish tank' builds, Sealants Online have a fish safe, aquarium-specific silicone mastic joint sealant or hybrid polymer-based aquarium sealant to make your aquaria sealing maintenance, build or repair, safe and secure.