PU Sealant For Car

Product Advantage

Outstanding Temperature Adaptability

PU Sealant For Car maintains optimal performance across a wide temperature range, from -30°C to 120°C. This versatility allows it to withstand extreme heat from engine bays and freezing cold in winter, without losing elasticity or adhesion—outperforming standard sealants that become brittle or viscous in harsh conditions.

Strong Adhesion to Multiple Automotive Substrates

This polyurethane sealant offers superior bonding to all common automotive materials, including steel, aluminum, plastic (PVC, ABS, PP), glass, and rubber. No primer is required for most substrates, saving time and labor while ensuring a firm, long-lasting bond that resists peeling or separation even under constant vibration.

Excellent Waterproof and Dustproof Performance

Formulated to create a seamless, flexible seal, PU Sealant For Car effectively blocks water, dust, dirt, and moisture from penetrating automotive joints and gaps. This protects internal components from corrosion, rust, and damage, extending the lifespan of vehicles and reducing maintenance costs.

Chemical and Wear Resistance

The sealant exhibits strong resistance to automotive fluids such as oil, gasoline, coolant, and cleaning agents, as well as UV radiation and environmental pollutants. It retains its integrity against abrasion and mechanical stress, ensuring long-term performance without cracking, shrinking, or deteriorating.

Product Uses

Automotive Exterior Sealing

Sealing of body seams, door edges, and trunk gaps to prevent water and dust intrusion

Bonding and sealing of automotive glass (windshields, side windows, rear windows) for leak-proof installation

Sealing of sunroofs, convertible tops, and roof racks to ensure waterproof performance

Repair of cracks and gaps in bumpers, fenders, and body panels

Engine and Underhood Applications

Sealing of engine covers, valve covers, and oil pans to prevent fluid leaks

Bonding and sealing of radiator hoses, coolant reservoirs, and air intake systems

Sealing of electrical component housings (batteries, alternators) to protect against moisture and dust

Automotive Interior Sealing

Sealing of dashboard gaps, door panels, and interior trim to reduce noise and vibration

Bonding of carpet edges, headliners, and interior plastic components

Sealing of air conditioning vents and ductwork for efficient climate control

Aftermarket and Repair Uses

Collision repair sealing for body joints and damaged areas

Restoration of old or worn seals in classic cars

Custom automotive modifications (e.g., sealing of custom body kits, spoilers, and accessories)

Product Operate Guide

Pre-Application Preparation

Check substrate compatibility: Test a small amount of PU Sealant For Car on an inconspicuous area to ensure adhesion and no surface damage.

Clean the surface: Remove all dirt, grease, oil, rust, and moisture from the bonding area using a degreaser or isopropyl alcohol. Allow the surface to dry completely (no residual moisture).

Mask the area: Apply masking tape along the edges of the sealing area to ensure clean, neat lines and easy cleanup.

Application Steps

Cut the sealant nozzle: Use a sharp utility knife to cut the nozzle at a 45-degree angle. The diameter of the cut should match the width of the gap (typically 3 to 6 mm for automotive applications).

Load the sealant: Insert the PU Sealant For Car cartridge into a standard caulking gun, ensuring it is securely positioned.

Apply the sealant: Hold the caulking gun at a 45-degree angle to the substrate. Squeeze the trigger steadily to extrude the sealant, filling the gap completely. Move the gun slowly and uniformly to avoid bubbles or gaps.

Tool the sealant: Use a damp finger or a tool to smooth the surface of the sealant within 10 minutes of application (before it becomes tack-free). This ensures proper contact with the substrate and a neat finish.

Post-Application Care

Remove masking tape: Peel off the masking tape immediately after tooling the sealant (do not wait for it to cure).

Allow curing: Keep the sealed area away from moisture, dust, and mechanical stress during the curing period. Avoid washing the vehicle or exposing it to heavy rain for at least 24 hours.

Cleanup: Use isopropyl alcohol or a polyurethane sealant cleaner to remove any excess uncured sealant. Cured sealant can be removed with a sharp tool or sandpaper.

1.Surface Cleaning

2.Affixed Tape

3.Sealant Mouth Cutting

4.Injection

5.Surface Fixing

6.Tape Remove

7.Finish