CT1 Exterior Adhesive & Underwater Pond Sealant – Black 290ml
CT1 Exterior Adhesive Sealant is a market-leading hybrid polymer sealant and structural adhesive, trusted by professionals and pond installers for demanding aquatic, pond, and koi pond applications. Uniquely formulated to bond and seal even underwater, CT1 is an exceptionally versatile solution for pond construction, pond repairs, liner fixes, and aquatic maintenance.
Unlike traditional mastics or silicones, CT1 contains no solvents and is 100% VOC-free, ensuring it will not shrink, crack, or react with surrounding materials. This guarantees a long-lasting, watertight bond, making it ideal for use in garden ponds, koi ponds, waterfalls, streams, and water features, where reliability is essential.
CT1 adheres strongly to a wide range of materials commonly used in pond and aquatic installations, including stone, concrete, brick, EPDM liners, plastics, metals, wood, and fibreglass. Its ability to cure in wet conditions makes it especially valuable for emergency pond repairs, sealing leaks, bonding pond fittings, or securing aquatic components without draining the pond.
Often described as an all-in-one replacement for silicone, mastic, and traditional adhesives, CT1 is a true problem-solver for both professionals and DIY pond keepers. Whether sealing around bottom drains, skimmers, pipe penetrations, or repairing pond edging, CT1 delivers dependable performance in challenging environments.
For complete installations and repairs, CT1 works seamlessly alongside other specialist products in our Pond Sealants & Adhesives Collection at Pond Supplies Essex — your trusted source for aquatic sealants, pond adhesives, koi pond repair solutions, and waterproof bonding products.
Key Benefits
Bonds and seals even when fully underwater
Ideal for ponds, koi ponds, and aquatic features
100% VOC-free and solvent-free formulation
No shrinkage, cracking, or chemical reaction
Acts as a replacement for silicone, mastic, and adhesives
Excellent adhesion to most pond construction materials
Suitable for internal and external pond use
Product Specifications
Product Name: CT1 Exterior Adhesive Sealant
Colour: Black
Tube Size: 290 ml
Sealant Type: Hybrid polymer adhesive
Cure Conditions: Works in wet and underwater environments
VOC Content: 0%
Application: Pond repair, liner bonding, aquatic sealing, construction
CT1 is an essential product for anyone involved in pond building, koi pond maintenance, or aquatic repairs, offering unmatched versatility, strength, and peace of mind. When combined with the full range of pond sealants and adhesives from Pond Supplies Essex, it ensures professional, long-lasting results every time.
