C-Tec CT1 Sealant and Adhesive 290ml (Colour Options)
CT1 sealant and adhesive 290ml is a trade-trusted, multi-purpose cartridge for sealing and bonding in one go. Ideal for busy decorating jobs and DIY repairs where you want a neat finish and strong hold without swapping products.
Choose from Black, Clear, Grey, White or Anthracite. CT1 can be painted once fully cured and is paintable with common water-based paints (not suitable with alkyd paints). For best results, test first on your system.
Key benefits
- Seal and bond with one cartridge (great for repairs, finishing and general maintenance)
- TRIBRID polymer technology
- Works on wet surfaces (including under water)
- Paintable once fully cured (water-based paints; not suitable with alkyd paints)
- Flexible performance with low shrinkage after cure (<3%)
- Wide temperature stability once cured (-40°C to +120°C)
- Available in popular colours for tidy, colour-matched finishes
Best for
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Trade: snagging, sealing junctions, bonding trims/profiles, quick repair & maintenance jobs
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DIY: home repairs, kitchens/bathrooms, bonding and sealing around common household materials
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Multi-surface fixes: where you need adhesion + sealing in one step
Why it matters
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One-product convenience: helps reduce tool changes and product overlap on the job
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Neat finishing: pick a colour that suits the joint line and surrounding materials
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Paint-ready planning: once cured, you can decorate over (with suitable paint systems)
Specifications
| Technology |
TRIBRID® Polymer |
| Cartridge size |
290ml |
| Application temperature |
+5°C to +40°C |
| Skin cure (23°C / 50% RH) |
25 minutes ± 5 minutes |
| Full cure rate (23°C / 50% RH) |
2–3mm / 12 hours (varies by application) |
| Thermal stability |
-40°C to +120°C |
| Volume shrinkage after cure |
<3% |
| Shelf life |
18 months |
| Curing system |
Neutral cure |
| Certifications / classifications |
EC1 Plus Certified, A+ Indoor Air Comfort GOLD®, ISEGA Food Preparation Certificate, ETAG 022 |
Suitable surfaces / compatibility
CT1 bonds to many common materials including metals (including lead), glass, mirrors, wood/MDF, fibreglass, tiles, concrete, most stones (without staining), and many synthetic materials and plastics.
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Not compatible: PP, PE and PTFE
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Mirrors: apply in vertical strips; not suitable for PP-backed mirrors
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Paint compatibility: paintable with common water-based paints once fully cured (not suitable with alkyd paints). Prior testing is recommended.
What’s included
- 1 × C-Tec CT1 Sealant & Adhesive 290ml cartridge (colour selected)
How to use (application guide)
- Store the cartridge at room temperature before use.
- Cut the cartridge at the nose, then cut the nozzle to your desired bead size.
- Load into a mastic gun and apply to a clean, degreased surface.
- Tool/finish the joint as needed. If using a finishing product/cleaner, follow the product instructions.
- Allow to cure fully before painting (water-based paints only; not suitable with alkyd paints). Prior testing is recommended.
Accessories & add-ons
Delivery & returns
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Free shipping over £50 (UK)
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28 day returns (UK) – see returns policy for full terms
Why buy from us?
- UK stock for reliable availability
- Fast dispatch
- Trade-friendly service for decorators and contractors
- Independent family-owned business
- 16 decorating stores nationwide
Choose your colour
Select Black, Clear, Grey, White or Anthracite to suit the finish you want. Clear is often chosen where you want a less visible bead; darker colours are popular for contrast lines and matching darker trims or frames.
FAQs
Is CT1 paintable?
Yes, CT1 can be painted once it is fully cured. It is paintable with common water-based paints, but it is not suitable with alkyd paints. Prior testing is recommended.
What surfaces does CT1 stick to?
CT1 bonds to many common materials including metals (including lead), glass, mirrors, wood/MDF, fibreglass, tiles, concrete, and most stones (without staining), plus many synthetic materials and plastics. It is not compatible with PP, PE and PTFE.
Can I use CT1 on wet surfaces or under water?
CT1 can be applied on wet surfaces, even under water. Make sure the area is suitable for your application and test first where needed.
How long does CT1 take to cure?
Skin cure at 23°C / 50% RH is typically 25 minutes ± 5 minutes. Full cure rate is application-dependent; as a guide, 2–3mm can cure in around 12 hours (conditions and bead depth can change this).
Is CT1 suitable for kitchens and bathrooms?
CT1 is commonly used for sealing and bonding jobs in kitchens and bathrooms. Choose the colour that best suits the finish and allow it to cure fully before painting.
Which colour should I choose (Black, Clear, Grey, White, Anthracite)?
Choose a colour that matches (or intentionally contrasts) the surrounding materials. Clear is useful where you want a less visible finish; White is common around trims; Grey and Anthracite suit darker frames and modern interiors; Black is often used for bold contrast or dark substrates.
Do I need any special tools to apply CT1?
You’ll need a standard mastic gun for 290ml cartridges. For a neat finish, use masking tape and tool the bead before it skins.
Can CT1 be used on mirrors?
Yes, but apply it in vertical strips and it is not suitable for PP-backed mirrors.
Will CT1 bond to plastics?
It bonds to many plastics and synthetic materials, but it is not compatible with PP, PE and PTFE. If you’re unsure, test on a small area first.
How should I store CT1?
Store unopened cartridges as advised for shelf life (18 months). Before use, ensure the cartridge has been stored at room temperature.