Automotive Sealants

Automotive sealants from Soudal covers windscreen bonding, panel sealing, underbody protection, and high-temperature engine bay applications for workshops and panel repair trades, supplied in 310ml, 600ml, and bulk formats to suit both single-job and high-throughput workshop use.

Sealants and coatings built for the demands under the bonnet, not just the shelf.

A dedicated windscreen sealant offers good sag resistance and high end strength, paired with a matched primer to increase bond strength on the glass and pinch weld. A general-purpose PU sealant and adhesive offers excellent adhesion across automotive, engineering, and construction substrates, while a high-temperature silicone withstands continuous exposure up to 280°C for engine bay sealing. Underbody protective coatings add sound deadening and water and solvent repellence to protect vehicle chassis long term. See the full Sealants range for general construction alternatives.

Choosing the right automotive sealant

Windscreen and glass bonding. A dedicated windscreen sealant with matched primer, formulated specifically for windscreen replacement with good sag resistance for vertical and overhead application.

General panel and structural sealing. A PU or MS adhesive sealant, both suited to bonding and sealing panels, trims, and structural joints with strong initial and long-term adhesion.

High heat, under-bonnet applications. A high-temperature silicone, rated to 280°C, for exhaust, engine bay, and other continuous-heat sealing jobs.

Underbody and chassis protection. Protective coatings providing sound deadening and water/solvent repellence over the sealed and protected areas.

Technical differentiators

• Cure speed: Fast-curing options for high-throughput panel and glass work
• Sag resistance: Windscreen sealants formulated to hold position on vertical and overhead application
• Temperature resistance: Standard sealants to general workshop conditions; high-temp silicone to 280°C
• Primer requirement: Windscreen sealant systems require a matched primer on glass and pinch weld for full bond strength
• Post-cure properties: Underbody coatings remain paintable and sound-deadening once cured

Automotive sealant application guidance

Windscreen sealant should always be used with its matched primer, applied to both the glass and the pinch weld before the sealant is applied, following the drive-away time stated on the datasheet before the vehicle is driven. Surfaces must be clean, dry, and free of old sealant residue or contamination before any automotive sealant is applied. High-temp silicone should be allowed to fully cure before the engine is run at operating temperature. Underbody coatings are typically applied to a clean, rust-treated surface and left to cure fully before the vehicle is exposed to water or road debris.

Explore the full Sealants range or contact us for workshop-scale supply.