OB1 Multi-surface Sealant & Adhesive
The Ultimate Guide
OB1 Multi-surface Sealant is a versatile, high-performance adhesive designed to handle the toughest jobs. With its waterproof, weather-resistant formula and excellent adhesion to a variety of materials, OB1 is the go-to choice for homeowners, DIYers, and professionals alike.
In this blog, we’ll breakdown why OB1 sealant is the ultimate solution for all your bonding and adhesive needs, and answer some of the most frequently asked questions on the product.
Why OB1 Is the Best Sealant on the Market
OB1 stands head and shoulders above the competition when it comes to reliability and versatility. This advanced sealant can bond and seal in wet or dry conditions, won’t shrink or crack over time, and is fully paintable.
One Tube Does It All! OB1 replaces mastics, wood glues, PU adhesives, silicone, acrylic, and butyl rubber sealants—making it the ultimate all-in-one solution. Its unique solvent-free hybrid polymer formula allows for a flexible, durable bond that can expand and contract with metal, wood, and all of the above materials without breaking down.
With a OB1 sealant gun, you can bond almost any surface, including:
- Metals
- PVC
- Glass
- Mirrors
- Polystyrene
- Wood
- Underwater applications
Unlike traditional silicone sealants that can crack or fail over time, OB1’s non-shrinking and non-cracking composition ensures a long-lasting seal, even in extreme temperatures ranging from -40°C to +120°C.
Whether you’re installing a mirror, fixing leaking gutters, sealing a bath, or working on a marine project, OB1 provides an exceptional bond that can handle both indoor and outdoor conditions. OB1’s food-safe and zero-VOC formula also makes it a superior, eco-friendly choice for anyone looking for a high-performance sealant that meets diverse needs.
OB1 Multi-surface Sealant & Adhesive FAQ’s
What is the OB1 Sealant Cure Time?
For OB1 Sealant, curing time refers to the process by which the sealant transitions from its initial application state to a fully hardened and adhered state, achieving optimal bonding and strength. The curing time for OB1 sealant varies depending on the thickness of the application, temperature, and humidity levels:
- Skin Cure: The sealant forms an initial, tack-free skin on the surface in about 8 minutes at 23°C and 50% relative humidity (R.H.).
- Non-Adhering Stage: After 25 minutes under the same conditions, the sealant reaches a non-adhering state, meaning it can be touched lightly without transferring.
- Full Cure Time: OB1 reaches full cure as follows:
- For applications up to 6mm thick, full cure is achieved in 24 hours at 23°C and 50% R.H.
- For thicker applications (7-12mm), it requires 48 hours to reach full cure at the same temperature and humidity.
These curing times indicate when the sealant has reached its maximum bonding strength and durability.
Is OB1 Sealant Waterproof?
Yes, OB1 Multi-surface Sealant & Adhesive is waterproof. It is designed to bond and seal effectively in both dry and wet conditions, and it can even be applied directly underwater. This waterproof property makes OB1 suitable for applications in bathrooms, kitchens, and other high-moisture areas. It’s also ideal for marine applications, such as swimming pools and underwater repairs, as it maintains its bond and integrity without shrinking, cracking, or collapsing due to water exposure.
What is the OB1 Sealant drying time?
For OB1 Multi-surface Sealant & Adhesive, the drying time refers to when the surface layer or “skin” is no longer tacky to the touch but hasn’t fully cured.
- Skin Drying Time: At 23°C and 50% relative humidity (R.H.), the sealant develops a dry, non-tacky skin on the surface in about 8 minutes.
- Non-Adhering Stage: After 25 minutes under these same conditions, the sealant becomes non-adhering, meaning it can be touched without sticking.
While this drying time makes the sealant easier to handle, it does not indicate full curing, which requires 24-48 hours depending on the thickness of the application.
How do you use OB1 Sealant?
To use OB1 Multi-surface Sealant & Adhesive effectively, start by preparing the surfaces you plan to bond or seal. Ensure they are clean, dry, and free from any grease, dust, or old adhesive. OB1 can be used in various conditions, including damp or even underwater applications, but cleaning the area first maximises the bond’s strength.
Next, prepare the OB1 cartridge by cutting the tip off the cartridge nozzle at a 45-degree angle, creating an opening slightly smaller than the desired bead size. Insert the nozzle into the gun, then load the cartridge by pulling back the caulking gun’s plunger and inserting the cartridge firmly into place. Squeeze the trigger a few times to push the plunger against the bottom of the cartridge, ensuring the sealant will dispense evenly when you begin.
As you apply the sealant, position the nozzle at the start of the joint or seam and pull the gun toward you while steadily squeezing the trigger. This technique, rather than pushing the gun forward, allows you to maintain a more controlled and even bead of sealant, avoiding gaps or uneven thickness.
Once applied, it’s important to shape or smooth the bead promptly, as OB1 forms a surface “skin” in about 8 minutes at room temperature. A gloved finger or a caulking tool can be used to smooth out the sealant for an even, professional-looking finish. Within 25 minutes, OB1 will reach a non-adhering stage, making it safer to handle without sticking to surrounding surfaces.
If you plan to paint over the OB1, wait until it is fully cured, typically after 24-48 hours depending on the thickness of the application. This curing period ensures that the sealant has fully bonded and hardened, providing a durable and waterproof base that can be safely painted.
Can you paint over OB1 sealant?
Yes, OB1 Multi-Surface Sealant can be painted over. It is compatible with water-based paints and can be painted once fully cured. If you plan to use oil-based or synthetic paints, it’s recommended to test a small area first to ensure compatibility and desired results.
Shop OB1 Multi-surface Sealant & Adhesive with the Screw Shop
The Screw Shop is your one-stop destination for all things sealants and adhesives. We stock OB1 Multi-surface construction Sealant and Adhesive at unbeatable prices. Available in five colors: White, Clear, Black, Anthracite, and Grey, browse our range online today. The Screw Shop: where all your sealant needs are met.
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