Applications

TEROSON® RB 3245 – Spot-weldable mastic adhesive – Automotive antiflutter sealing for hoods and doors

  • Item Name: TEROSON® RB 3245

  • Manufacturer: Henkel

  • Technologies: Rubber

  • Color: Yellow

  • Cure Type: Heat curing (≥155 °C)

  • Package Size: Contact Techniq VN for details.

  • Shelf Life: 3 months

1. Product Overview

TEROSON® RB 3245 is a solvent-free, heat-curing, expandable spot-weldable mastic adhesive based on rubber. It chemically cross-links at temperatures above 155 °C, providing a flexible bond with high wash-off resistance without requiring pregelling or precure. The product adheres well to oily steel sheets, shows reliable corrosion resistance, and is designed for easy application with high-pressure pumps. Once cured, it maintains elasticity across a wide temperature range and withstands short-term heat exposure.


2. Applications

TEROSON® RB 3245 is developed as an antiflutter sealant for filling gaps between steel plates and reinforcing structural rigidity against vibrations. In automotive manufacturing, it is commonly used between skin panels and stiffeners of hoods, doors, and bonnets. Additionally, it serves as a spot-weld sealer, especially in cases where ovens or induction precuring are not available but strong wash-off resistance and long-term elasticity are required.

3. Typical Properties

Condition Property Value
Uncured Colour Yellow
Consistency Paste
Specific Gravity 1.4 ± 0.1
Solids Content >95 %
Viscosity (Brookfield, 20 °C, Spindle 7, 2 rpm) 20,000 – 35,000 mPa·s
Sag Resistance Good
Cured Expansion Rate ~50 %
Corrosion Resistance Good
In-service Temperature Range -40 to +80 °C
Short-term Temperature Resistance (1 h) 200 °C

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