The most important part when selecting any sealant - whether it is the clear Silicone Sealant or any other type of sealant is to remember that it should be 'non toxic', especially if you are sealing round pipe work which will be in close contact with the pond water.
All silicone and adhesives should, where possible, be allowed to cure for 24 hours before being submersed in water.
Solvent Glue 125ml
Weld-On® 725™ Wet ‘R Dry™ is an aqua blue, medium bodied, extremely fast setting, high strength PVC solvent cement for..