C-TEC CT1 Sealant & Adhesive

C-TEC CT1 Sealant & Adhesive for Sealing, Bonding and Snagging Work

C-TEC CT1 Sealant & Adhesive is a professional-grade all-in-one sealant and construction adhesive designed to handle a huge range of sealing and bonding jobs across building, maintenance, repair and installation work. Whether you are sealing joints, fixing trims, bonding materials together, carrying out repair work, or dealing with snagging items on site, CT1 is designed to offer strong adhesion, flexible sealing performance and broad application versatility from a single cartridge.

One of the biggest advantages of C-TEC CT1 Sealant & Adhesive is its ability to replace multiple traditional products on site. The product information supplied for CT1 states that it can replace wood adhesives, PU adhesives, silicone sealants, sanitary silicone sealants, acrylic sealants and butyl rubber sealants. That makes it a practical choice when you want to reduce the number of separate products you carry while still keeping a high-performance solution available for everyday work.

CT1 is designed for a wide variety of applications, including construction, engineering, roofing, repair and maintenance, installation and marine repair. It is supplied in a 290ml cartridge and applied using a standard mastic gun, making it straightforward to use on site, at home or in the workshop.

Why Choose C-TEC CT1 Sealant & Adhesive?

One Product for Sealing and Bonding

Instead of needing one product for sealing joints and another for bonding materials, C-TEC CT1 Sealant & Adhesive is designed to do both. This makes it especially useful for snagging, repair work and maintenance jobs where speed, convenience and versatility matter.

Suitable for Wet Surfaces

A major benefit of CT1 is that it can be used on wet surfaces and even underwater. That gives it a practical edge for difficult site conditions, external repairs, bathroom work, plumbing-related sealing, roofing details and marine environments where perfectly dry substrates are not always realistic.

Broad Substrate Compatibility

CT1 is designed to bond to a very wide range of materials, including all metals including lead, glass, mirrors, all woods, MDF, polystyrene, fibreglass, tiles, concrete, most stones without staining, most synthetic materials and many plastics. This broad compatibility makes it a genuine go-to product for mixed-material jobs. The product information notes exclusions for PP, PE and PTFE, so suitability should always be checked for those materials.

Paintable When Cured

For many finishing jobs, appearance matters just as much as performance. CT1 can be painted with common water-based paints once fully cured, helping it blend more easily into finished work. It is not suitable with alkyd paints, and prior testing is recommended where finish compatibility is important.

Product Benefits

Ideal for Snagging and Finishing Work

Because C-TEC CT1 Sealant & Adhesive seals and bonds from one tube, it is highly practical for snagging lists, final repairs, call-backs, maintenance visits and small finishing jobs where you need a dependable product that can adapt to different tasks quickly.

Strong, Flexible Performance

The supplied product information lists TRIBRID polymer technology, a tensile strength of up to 2.90 N/mm² for colours and 1.60 N/mm² for Clear and Silver, plus elongation at rupture of 385% for colours and 500% for Clear and Silver. This combination supports a strong bond while still allowing flexibility in service.

Low Shrinkage

CT1 is listed with volume shrinkage after cure of less than 3%, helping support a cleaner finished joint and reducing the risk of unsightly shrink-back after application.

Good Temperature Resistance

Once cured, CT1 has stated thermal stability from -40°C to +120°C, making it suitable for a wide range of internal and external conditions where temperature changes can affect lesser products.

Useful in Demanding Environments

Good resistance to water, seawater, aliphatic solvents, oils, greases and diluted organic acids, with moderate resistance to esters, ketones, aromatics and chlorine for swimming pools/chlorinated solvents. Strong acids and alkalis are listed as limitations.

Product Properties

Cartridge Size

• 290ml cartridge
• Recyclable cartridge format, with the note that the cartridge should be completely empty and the nozzle removed before recycling.

Available Colours

CT1 is supplied in:

• Clear
• White
• Black
• Grey
• Beige
• Brown
• Oak
• Blue
• Silver
• Anthracite

Application Temperature

The stated application temperature is +5°C to +40°C.

Cure and Skin Times

The product information gives a skin cure of approximately 25 minutes ±5 minutes at 23°C and 50% RH. Full cure times are listed as:

• 2–3mm / 12 hours
• 3–6mm / 12–48 hours
• 6–12mm / 48–72 hours

Cure time can vary depending on application, environment and joint depth.

Flow and Finish

CT1 is listed with flow/sag below 3mm, which helps it stay workable and controllable during application.

Typical Applications

Sealing Internal and External Joints

CT1 is suitable for a wide range of sealing jobs, including building maintenance, general construction details, roofing-related work and installation tasks. The coloured range also has supporting declarations covering façade, sanitary and pedestrian walkway sealant uses.

Bonding Trims, Fixtures and Mixed Materials

Because it adheres to metals, glass, timber, MDF, tiles, concrete, fibreglass and many synthetic materials, C-TEC CT1 Sealant & Adhesive is useful for bonding jobs where multiple substrates are involved.

Bathrooms, Kitchens and Wet Areas

EN 15651-3 performance for the coloured range used as a sealant for sanitary joints, including microbiological growth SX3. CT1 can be used in wet environments, and a assignment report records a passed water-tightness test in a bathroom panel assembly using CT1.

Roofing, Maintenance and Repair

Its wet-surface capability and broad adhesion profile make CT1 a useful product for repair and maintenance work where conditions are less than ideal and speed matters.

Marine and Underwater Work

CT1 works on wet surfaces and even under water, making it suitable for marine repair and similar demanding sealing and bonding applications.