Bastion Bond Breaker Joint Sealant
Professional silicone bond breaker for wet areas. Create a flexible, waterproof separation at wall to wall and wall to floor junctions so your membrane and tile system can move without cracking. Ideal for bathrooms, showers, laundries and balconies.
Why choose this sealant
- Permanently flexible to absorb movement in corners and junctions
- Neutral cure silicone suitable for use with most waterproofing membranes
- Low odour, low VOC, indoor use friendly
- Excellent adhesion to common building materials including concrete, masonry, ceramic tile, porcelain and most metals
- Water resistant once cured and designed for wet area applications
- Easy to gun out and tool for a smooth finish
Typical uses
- Forming a bond breaker fillet in shower bases, bathrooms and laundries before waterproofing
- Movement joints at internal corners prior to tiling
- General wet area sealing where a flexible joint is needed
Surface preparation
- Ensure surfaces are clean, dry and free from dust, oil, loose material and old sealant.
- Mask adjacent edges for a neat finish if required.
- For wide gaps, insert backing rod to control sealant depth.
How to apply
- Cut the cartridge nozzle to the desired bead size and load into a standard caulking gun.
- Gun a continuous bead into the corner or joint. Aim for a smooth cove fillet in the 5 to 12 mm range.
- Tool the bead with a spatula or rounded tool to compact and shape it. Remove masking tape while the sealant is still wet.
- Allow the bond breaker to skin before applying compatible waterproofing membranes over the area. Follow your membrane manufacturer’s recoat time.
Cure and finishing
- Skin time is typically minutes depending on temperature and humidity.
- Full cure occurs over 24 to 48 hours for standard beads. Thicker sections require longer.
- After the membrane has cured, complete tiling and finish perimeter joints with a sanitary grade silicone.
Clean up
- Wipe away excess immediately with a clean cloth.
- Once cured, remove mechanically by trimming and peeling.
Handy tips
- Not paintable. If painting is required, paint adjacent surfaces before sealing.
- Always use backing rod for large joints to control sealant depth and reduce three sided adhesion.
- Pre test on sensitive or natural stone surfaces.
- Do not use in continuously immersed conditions or for structural glazing.
Storage and packaging
- Cartridge size: 300 mL
- Store upright in a cool, dry place. Use before the best by date printed on the cartridge.
Safety
Use in a well ventilated area. Avoid contact with skin and eyes. Keep out of reach of children. Refer to the product label for first aid directions.
In the box
- 1 x 300 mL cartridge of Bastion Bond Breaker Joint Sealant
- 1 x application nozzle
