Seal-It 353 SUPER-STRONG is a high-quality, extremely strong, stain-free, universal MS-Polymer® based adhesive sealant. Specifically for sealing and bonding of various materials.
Seal-it® 353 SUPER-STRONG
Seal-It 353 SUPER-STRONG is a high-quality, extremely strong, stain-free, universal MS-Polymer® based adhesive sealant. Specifically for sealing and bonding of various materials.

Applications
- Specifically for high-strength sealing and bonding of virtually all materials.
- Elastic bonding and sealing in automotive, bus, caravan, truck and train structures.
- Universal joint sealing and material bonding in industry, marine and automotive.
- Stain-free sealing and bonding of porous materials and sensitive substrates.
- Bonding and sealing of corner profiles, roof and floor systems in the transportation industry.
- Multi-purpose assembly and construction adhesive, suitable for virtually all construction materials.
- Bonding of polyester structural components to metal and aluminum frames.
- Structural bonding in vibrating structures of buildings, vehicles and equipment.
- Sealing and bonding in bodywork, trailer, ship, container and air duct construction.
- Repair adhesive sealant for damaged MS-Polymer® joints and adhesive joints.

Properties
- Low odor, blow and shrinkage-free curing.
- Permanently permanently elastic.
- Excellent adhesion without primer on almost all, even damp substrates.
- Extremely high tensile strength, mechanical resistance, final strength and rapid strength build-up.
- Does not stain or bleed in porous materials, does not cause edge zone contamination.
- Easy to use and versatile in application.
- Suitable for bonding or sealing almost everything indoors and outdoors.
- Paintable with dispersion-based paint and lacquer systems.
- Plasticizer-, phthalate-, isocyanate-, solvent- and silicone-free.
- Perfectly sandable and grindable after complete curing.
- Compatible with foodstuffs, PVB films, laminated glass and silver-coated mirrors.
- Excellent absorption of acoustic and mechanical vibrations and oscillations.
- Durable UV, weather, water, moisture, aging resistance.

Application conditions
- Application temperature (ambient and substrate) between min. +5°C and max. +35°C.
- On load-bearing, tolerant, clean, grease- and dust-free substrates.
- Remove loose substrate particles completely with a suitable brush.
- Completely degrease greasy substrates with SEAL-IT® 510 CLEANER.
- Apply in correct joint dimensions to accommodate movements.
- SEAL-IT® 353 SUPER-STRONG has a broad adhesion spectrum, however prime highly porous substrates with SEAL-IT® 520 PRIMER. Non-porous substrates with minimal adhesion should be pretreated with SEAL-IT® 525 CLEAN & BOND.
- SEAL-IT® 520 PRIMER can be applied easily, quickly, cleanly, evenly and not excessively using SEAL-IT® 590 PRIMERFLES + KWAST, under proper temperature and substrate conditions (see TDS).
- As soon as the primer is dry, apply SEAL-IT® 353 SUPER-STRONG as soon as possible.
- Wet-finish for skin formation using SEAL-IT® 550 FINISH and smoothen immediately afterwards using SEAL-IT® 590 FINISHING PADDLE, FINISHING PADDLE QUARTET or FINISHING WOOD.
Assortment
Colour | 12 x 290ml | 12 x 600ml |
Grey | SI-353-7100-290 | SI-353-7100-600 |
Pallet Unit:
Cartridge blank – 1560 pieces
Cartridge seal-it – 1248 pieces
600ml foil pack – 792 pieces
600ml foil pack Seal-it – 792 pieces
SI-XXX-XXXX-XXX = Item number.
Certification
- EN 15651-1: F-EXT-INT-CC 20 HM
- EN1561-3: XS3
- EN15651-4: EXT-INT-CC 20HM
- VOC-emission class A+