OB1 Brown Multi-Surface Construction Sealant & Adhesive
Versatile OB1 waterproof sealant for metal, plastic, wood & underwater use. VOC-free, food-safe, and weatherproof.
OB1® Brown Multi-Surface Construction Sealant & Adhesive is a versatile, waterproof silicone solution suitable for a wide range of construction and repair applications. Its unique hybrid polymer formulation provides an exceptional bond for metals (including lead), plastics (such as PVC and GRP), glass, mirror, polystyrene, fibreglass, and wood—even in wet or underwater conditions.
Key features include:
- Excellent Chemical Resistance
- Resists Fungal Growth
- Weather Resistant
- Food Safe (Conforms to ISEGA Standards)
- No Solvents or Isocyanates (Zero VOCs)
- Does Not Shrink
- Paintable
- Unique Flexibility (Elongates up to 350%)
- Works in Wet or Dry Conditions (Including saltwater)
Applications
- Aluminium & Wood Bonding: Maintains a strong bond from -40°C to +120°C, accommodating material expansion and contraction.
- Marine & Pool Sealant: Water-resistant, even in saltwater, making it ideal for underwater tile applications.
- Carbon Fibre & GRP Repair: Provides a durable, flexible bond resistant to vibration and movement.
- Plastic-to-Metal Adhesion: Solvent-free formula prevents surface damage while allowing flexibility.
- Solar Panel Installation: Unlike silicone mastics, it won’t shrink, crack, or degrade.
- Mirror Adhesive: No solvents or isocyanates means no degradation of mirror backing.
- Bathroom & Kitchen Use: Prevents bacterial and mould growth, making it safe for food zones.
- Roofing & Gutters: Effective for sealing lead flashings and repairing leaking gutters.
- Gardening Repairs: Repairs terracotta, ceramic, concrete, and pond ornaments—even underwater.
After bigger quantities? Need extra quantities? Get in touch and we'll organise it for you.
- Dispatched within 0-2 business days
- Delivery to United States: 3-5 business days*
- Free Shipping Included
- Metal-to-metal bonding (including aluminium and lead)
- Plastic and GRP construction
- Glass and mirror installations
- Underwater sealing (pools, marine applications)
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- Material: Hybrid polymer silicone
- Colour: Brown
- Temperature Resistance: -40°C to +120°C
- Elongation: Up to 350%
- Chemical Resistance: Excellent
- Fungal Resistance: Yes
- Weatherproof: Yes
- VOC-Free: Zero VOCs
- Food Safe: ISEGA-compliant
- Application: Wet or dry surfaces, underwater compatible
- Paintable: Yes
- Weight: 522g
Always follow local regulations and product guidance.
Free standard delivery on Australian mainland orders. Express delivery options and international shipping available at checkout.
We offer a 30-day money-back guarantee on most products. For faulty items, contact us within 14 days for a replacement or refund.
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