Novol 33101 Gravit 630 - Polyurethane Seam Sealant (310ml)
Seal your automotive repairs with the industrial strength of Novol Gravit 630. This one-component (1K) polyurethane sealant is the professional standard for sealing joints, welds, and overlapping metal sheets.
Presented in a standard 310ml cartridge, the Grey formula is designed to remain permanently elastic, ensuring that vibration, chassis flex, and thermal expansion don't compromise the airtight and watertight integrity of your vehicle's bodywork.
Key Features & Benefits
- Permanent Elasticity: Does not become brittle over time; it moves with the vehicle to prevent cracking in structural joints.
- Superior Adhesion: Bonds powerfully to bare steel, aluminum, galvanized surfaces, and cured 2K primers (like epoxy or acrylic).
- Anti-Corrosive Barrier: Creates an impenetrable seal against moisture and road salt, stopping "seam rust" before it can start.
- Overpaintable: Can be coated with all automotive paint systems (water-borne or solvent-borne) once a surface skin has formed.
- No Shrinkage: High solid content ensures the bead maintains its volume and shape during the curing process.
- Vibration Dampening: Softens mechanical noise by absorbing energy between joined metal panels.
Common Application Areas
- Wheel Arches & Shock Towers: Sealing the critical joints where road spray is most aggressive.
- Boot & Bonnet Floors: Closing the gaps in multi-layer sheet metal assemblies.
- Welded Seams: Protecting fresh welds from atmospheric moisture.
- Drip Rails & Guttering: Ensuring water sheds correctly away from the cabin.
Professional Application Strategy
To achieve a "factory-original" look, the technique used during application is vital.
Application Steps:
- Preparation: Surfaces must be clean, dry, and degreased with Novol Plus 780. For best results, apply over an epoxy primer (like Novol Protect 360).
- Extrusion: Use a standard caulking gun. Cut the nozzle to the desired bead width.
- Tooling: Use a stiff nylon brush or a finger dipped in a mild soapy water solution (or specialized smoothing agent) to level the bead and push it into the seam.
- Painting: For the best adhesion, wait for a skin to form (approx. 1 hour) before overpainting.
Expert Insight: If you want to replicate the "brushed" look found in many engine bays and trunks, apply a generous bead and immediately use a short-bristled brush to "paint" the sealant over the seam.
