Paint Shop Engineered Products

Our advanced lineup of products for the automotive paint shop improve vehicles inside and out, with water‐tight seals, unsurpassed underbody protection and remarkable paintability.

Body Sealer

We offer superior body sealers that provide manufacturers with truly waterproof, dustproof, and corrosion‐proof solutions for automotive body joints that are susceptible to environmental threats. These one‐component PVC sol/acryl sol sealing materials accommodate multiple wet‐ on‐wet coating applications without requiring the time and expense of oven curing between coats. These sealers are tough on the elements, yet easy on your team—and your bottom line.

Distinct Benefits

• Protection at its best. Body Sealer keeps dust and moisture out, preserving the integrity of steel panels inside and outside of the automobile cabin. It puts a durable, rustproof coating on vulnerable steel plate edges, virtually eliminating corrosion.
• Ultimate application flexibility. Body Sealer can be applied manually or robotically during the paint process, then cured in the paint shop’s baking oven.
• Excellent adhesion. Our body sealer is engineered to provide exceptional adhesion, including bonding securely to electodeposition coatings.

• Tailored to your needs. Sunstar’s flexible design allows for the material’s properties and performance characteristics to be optimized for each working environment, application, coating, and working condition. Custom specifications can be set to further fine‐tune coating properties and assure exceptional paint finishing for your shop.
• Excellent compatibility. Our Body Sealer systems are highly compatible with virtually all adherends and paints, and are cured in conventional OEM paint shop baking ovens one time (no need for curing between each applied coating). Achieving excellent results is easy when everything works together.

Production process

Applicable substrates

✓ Full adhesion / – Not recommended

Metal

SPCC	High tensile steel	Galvanized steel sheet	Aluminum
–	–	–	–

Plastic

PC	CFRP	PC/ABS	PC/PET	PP	ABS	PA/PPE	PVC	PBT
–	–	–	–	–	–	–	–	–

Others

Painted metal	Electro deposited metal	Glass	Electronic parts
✓*1	✓	–	–

*¹ Depends on product

Curing method

Application parts

Underbody Coating

The underside of an automobile is subjected to a pounding from stones, debris, road grime, moisture and corrosive agents such as road salt and brine. Sunstar Underbody Coatings— available in both thin film and foaming types—are designed to provide a critical protective barrier between the road and vulnerable underbody surfaces. In addition to protecting from moisture and impact, the foaming‐type products provide excellent sound dampening properties.

Distinct Benefits

• Tailored to your needs. Sunstar has engineered a solution with diverse manufacturing needs in mind. Our underbody coating has been developed to be tailored to varying processes and working conditions, providing optimum performance for each unique environment, application, and condition present in regions around the world.
• Low weight. High performance. Although our thin‐film type underbody coating has a thinner application and a lower specific gravity, it delivers the same performance as thicker, heavier coatings thanks to its advanced formulation.
• Lower cabin noise. Our flexible foaming‐type underbody coating provides a tough, sound‐deadening barrier that reduces stone and cinder noise, contributing to a more comfortable, quiet driving experience.

Production process

Applicable substrates

✓ Full adhesion / – Not recommended

Metal

SPCC	High tensile steel	Galvanized steel sheet	Aluminum
✓*1	–	✓*1	–

Plastic

PC	CFRP	PC/ABS	PC/PET	PP	ABS	PA/PPE	PVC	PBT
–	–	–	–	–	–	–	–	–

Others

Painted metal	Electro deposited metal	Glass	Electronic parts
✓*1	✓	–	–

*¹ Depends on product

Curing method

Application parts

Structural Cavity Filler

Sunstar leads the way with advanced products for the automotive paint shop, including high‐ performance gap and cavity fillers engineered to improve automobile structure rigidity while also reducing vehicle weight.

Distinct Benefits

• A wide range of products. Structural Cavity Fillers are available in a wide range of foam expansion ratios to assure the right filler for the right application. Cartridge type products are available for manual application.
• Excellent filling property. The unique low‐drip, high‐build formulation delivers exceptional gap filling performance.
• Simple curing process. As a two‐component mixture‐type product, these fillers do not require ovens or UV lamps to accelerating curing.
• Non‐polluting. Structural Cavity Fillers do not contaminate electrodeposited surfaces and are designed to promote coating quality.

Production process

Applicable substrates

✓ Full adhesion / – Not recommended

Metal

SPCC	High tensile steel	Galvanized steel sheet	Aluminum
–	–	–	–

Plastic

PC	CFRP	PC/ABS	PC/PET	PP	ABS	PA/PPE	PVC	PBT
–	–	–	–	–	–	–	–	–

Others

Painted metal	Electro deposited metal	Glass	Electronic parts
✓*1	✓	–	–

*¹ Depends on product

Curing method

Application parts

Acoustic Cavity Filler

Sunstar’s Acoustic Cavity Fillers are engineered to dramatically improve sound insulation and vibration damping. These fillers close the gaps and cavities throughout the automobile body that commonly generate unwanted noise and resonance.

Distinct Benefits

• Excellent filling properties. The unique low‐drip, high‐build formulation delivers exceptional gap filling performance.
• Superb sound insulation and vibration damping. The properties of Acoustic Cavity Fillers were developed specifically to suppress the noises and resonations that can detract from the driving experience. The result is a quieter, more enjoyable cabin.
• Uncompromising. These fillers have been developed to be highly compatible with electrodeposited surfaces, preserving their integrity along with top coat quality.

Production process

Applicable substrates

✓ Full adhesion / – Not recommended

Metal

SPCC	High tensile steel	Galvanized steel sheet	Aluminum
–	–	–	–

Plastic

PC	CFRP	PC/ABS	PC/PET	PP	ABS	PA/PPE	PVC	PBT
–	–	–	–	–	–	–	–	–

Others

Painted metal	Electro deposited metal	Glass	Electronic parts
✓*1	✓	–	–

*¹ Depends on product

Curing method

Application parts