Dunlop FC Joint Sealant
Dunlop FC Joint Sealant is a premium, ultra flexible, moisture curing polyurethane sealant designed for jointing fibre cement, blueboard and compressed fibre cement sheets. The non slump formula handles joints up to 40 mm wide with a movement capability of plus or minus 25 percent. It is easy to apply, solvent free and isocyanate free. Colour: Grey.
Why choose this sealant
- High flexibility for dynamic joints
- Non slump for clean, accurate beads on vertical and horizontal surfaces
- Solvent free and isocyanate free
- Paintable after curing
- Reliable performance supported by a 10 year guarantee
Ideal uses
- Joints in fibre cement, blueboard and compressed fibre cement sheets
- Facade and cladding joints where movement is expected
- General building joints up to 40 mm width
Compatible surfaces
Adheres to most common construction substrates, including:
- Fibre cement sheets and blueboard
- Precast concrete panels, blockwork and bricks
- Sandstone and granite
- Fibreglass
- Plasterboard
Technical details
| Movement capability |
± 25% |
| Joint width |
Up to 40 mm |
| Skin time |
Approximately 35 minutes at 23°C and 50% RH |
| Tack free time |
Approximately 1 hour at 23°C and 50% RH |
| Cure rate |
About 2.5 mm per 24 hours at 23°C and 50% RH |
| Application temperature |
10°C to 35°C |
| Clean up |
Warm water immediately after use |
| Shelf life |
12 months unopened, stored cool and dry |
| Finish |
Paintable when dry. Can be overcoated with paint or texture coats. |
| Colour |
Grey |
Surface preparation
Ensure surfaces are clean and dry, free of dust, oil, grease, salt, mould, release agents and any contaminants that may affect adhesion. Mask adjacent areas to keep lines neat. Follow sheet fixing instructions from the board manufacturer.
How to apply
- Cut the nozzle at a sharp angle slightly wider than the desired bead or joint width.
- Use a suitable backing rod where required to control depth. Aim for a joint depth equal to half the joint width.
- Gun the sealant into the joint and tool within 10 minutes using a round spatula to ensure full contact with the joint sides.
Curing times increase in cold or humid conditions.
Safety and handling
Avoid contact with skin and eyes. Wear protective gloves, clothing and eye protection. Ensure adequate ventilation during application. Keep out of reach of children. Refer to the product SDS for full safety guidance.
Guarantee
Backed by a 10 year guarantee when used as directed.
