CT1 Sealant & Adhesive – All in 1 – CLEAR

CT1 sealant adhesive is one of those products that earns its place in a tool bag by actually doing what it claims. In a single cartridge, CT1 combines a high-strength structural adhesive with a permanent, flexible sealant — handling jobs that would otherwise need two separate products, mechanical fixings, or both. Whether you are bonding a mirror to a tiled wall, sealing around a roof flashing, or fixing a metal bracket to a concrete surface, CT1 deals with it without fuss.

The clear variant is particularly useful when the finish matters. Unlike grey or white sealants that show against glass or light-coloured surfaces, the clear formulation dries virtually invisible. This makes it a sensible choice for glazing applications, glass splashbacks, shower enclosures, and anywhere the bead itself needs to disappear into the background.

What CT1 Sealant Adhesive Bonds and Seals

CT1 bonds across an unusually wide range of materials. Metals including lead, copper, aluminium and steel all take it well. Glass, mirrors, tiles, concrete, most stones, wood, MDF, polystyrene, fibreglass, and the majority of synthetic materials and plastics are all within its range. The exception list is short: CT1 is not suitable for bonding PP (polypropylene), PE (polyethylene), or PTFE, so if you are working with those materials you will need a different approach. On most stones it will not stain, though testing on a hidden area first is worth doing on porous or light-coloured natural stone.

The adhesive bond CT1 forms is strong enough in many applications to replace mechanical fixings entirely. This matters on jobs where drilling is not an option — think glass, coated surfaces, or substrates where a screw would cause damage or simply would not hold.

Performance in Wet and Outdoor Conditions

CT1 is fully waterproof once cured and can be applied to damp or even wet surfaces, which sets it apart from most sealants that need a dry substrate. This makes it genuinely useful outdoors and in situations where drying the surface first is not practical — gutters, rooflines, and outdoor masonry repairs included. CT1 is also UV-stable and resistant to most chemicals, so it holds up in exposed positions without the discolouration and cracking that affects lower-quality sealants over time.

The formulation is solvent-free, which means no shrinkage after application. What you see when you tool the bead is what you get when it cures. It remains permanently flexible after curing, so it can handle movement and vibration without cracking — useful anywhere two different materials are being bonded together, since different materials expand and contract at different rates.

CT1 is used across a wide range of trades: plumbing, joinery, roofing, glazing, general building, and maintenance work. At this price per cartridge it is a practical choice to keep on the van, ready for the job that does not fit neatly into a single product category.