ENDRUST® UB302B is a heavy-duty Bituminous Rustproofing Sealant formulated to comply with AS2662, Part 1 – 1983 – Corrosion Inhibition (Rust Proofing) for Motor Vehicles. It is specifically designed to inhibit rust formation on undercarriage sections such as floor pans, firewalls, chassis members, and wheel arches of motor vehicles, caravans, and trailers.

This heavy-bodied, waterproof, anti-corrosive, and noise-suppressing black compound is fortified with bitumen, waxes, and corrosion preventatives. It exhibits excellent seam penetration with minimal sag and runs when applied by spray through a body deadener gun. Once dry, it forms a durable, flexible coating with a stippled surface finish that provides outstanding resistance against stone chip damage. An intact seal of ENDRUST® UB302B will protect the undercarriage from damage caused by flying stones and road debris and will help maintain corrosion protection for 4WD vehicles against sand, mud, tree roots, and rocks. Additionally, it reduces the penetration of road and tyre noise through the floor pan and firewall into the cabin.

Sizes: 400g Aerosol, 20L, 200L

Colour:  BLACK

Also known as:  Bituminous-Based Bottomside | Bituminous-Based Underbody Black | Bituminous-Based Proofcoating

To purchase this product for DIY use or enquire about becoming an approved Endrust Applicator please use our  Enquiry Form or call us on (08) 9325 1399

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SKU UB302B Category

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Product FAQ's

Q: Why should I choose a bituminous-based rustproofing product like Endrust over rubberized coatings?
A: Bituminous-based rustproofing products, such as Endrust, are less likely to trap moisture compared to rubberized coatings. Moisture entrapment can promote corrosion over time, making bituminous-based coatings a preferable choice for effective rust protection.

Q: What is the advantage of using a thixotropic rustproofing product?
A: Thixotropic rustproofing products, like Endrust, offer multiple advantages. They provide enhanced protection against chipping and abrasion, thanks to their ability to absorb and dissipate energy upon impact or friction. Thixotropic coatings also accommodate the flexing of the substrate, ensuring that the protective layer remains intact even under dynamic conditions.

Q: How does bituminous-based rustproofing prevent moisture entrapment?
A: Bituminous-based rustproofing, such as Endrust, minimizes moisture entrapment due to its thixotropic properties. The coating remains in a higher viscosity state when at rest, reducing the risk of moisture becoming trapped between the coating and the metal surface. This characteristic helps prevent the accumulation of moisture, which can lead to corrosion.

Q: Will a thixotropic rustproofing product like Endrust protect against chipping and abrasion?
A: Yes, thixotropic rustproofing products excel in providing superior protection against chipping and abrasion. The reversible viscosity change in thixotropic coatings, such as Endrust, allows them to absorb and dissipate energy during impacts or friction, minimizing the risk of coating damage and preserving the integrity of the protective layer.

Q: Is a thixotropic rustproofing product suitable for vehicles with substrate flexing?
A: Absolutely. Thixotropic rustproofing products, like Endrust, offer flexibility to accommodate substrate movement, including vibrations, expansions, and contractions. This flexibility ensures that the protective layer remains intact, preventing the formation of cracks or gaps that could expose the substrate to corrosion-causing elements.

Remember to consult with professionals or experts in rustproofing to understand specific application guidelines and the best solution for your vehicle's needs.

Bitumen vs Rubberised

Endrust Bituminous Based Underbody, being a thixotropic product, offers significant advantages over rubberized coatings, especially in preventing moisture entrapment and addressing factors like chipping, abrasion, and substrate flexing. Here's why it is preferable to use a thixotropic product like Endrust:

1. Minimizes Moisture Entrapment: Unlike rubberized products, bituminous-based rustproofing is less likely to trap moisture. The thixotropic properties of the coating ensure that it remains in a higher viscosity state when at rest, reducing the risk of moisture becoming trapped between the coating and the metal surface. This characteristic helps prevent the accumulation of moisture, which can contribute to corrosion over time.

2. Enhanced Protection against Chipping and Abrasion: Thixotropic coatings excel in providing superior resistance to chipping and abrasion. Endrust Bituminous Based Rustproofing's reversible viscosity change enables it to absorb and dissipate energy when subjected to impacts or friction. This exceptional resistance minimizes the risk of coating damage, preserving the integrity of the protective layer and the underlying substrate.

3. Flexibility for Substrate Movement: The flexibility offered by a thixotropic product is particularly advantageous when dealing with substrate flexing. The coating's ability to adapt to the substrate's movements, expansions, and contractions ensures that it remains intact even under dynamic conditions. This flexibility prevents the formation of cracks or gaps in the coating, safeguarding the substrate from exposure to corrosion-causing elements.

In summary, choosing a thixotropic product such as Endrust Bituminous-Based Rustproofing over rubberized coatings provides several benefits. It reduces the likelihood of moisture entrapment, which can promote corrosion. Additionally, the thixotropic properties of the product offer enhanced protection against chipping and abrasion, while also accommodating the flexing of the substrate. By opting for a thixotropic solution, you can ensure long-lasting, effective rust protection for your customers' vehicles.

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