Bond It HA6 RTV Marine Water Fish Tank Grade Silicone Seawater Gasket Sealant UK Description: A high quality, non‐shrinking, marine quality, automotive silicone sealant. Surpasses the requirements of EN15651‐1,2:2012 Uses HA6 is unaffected by UV, ozone, salt water immersion and extremes of temperature and is non-slumping in paste form. HA6 contains no fungicides or oils which may leach into water and is therefore recommended for bonding, bedding and sealing glass in aquarium construction. HA6 is also recommended for the manufacture of in-situ gaskets and seals for pumps and pipework to prevent water ingression and as a dust and weatherproofing seal for cabinets in dirty environments or external applications. It is ideal for use on: glass; ceramics; anodised aluminium; .