HB BODY Undercoating Spray – U951 Autoflex 400ml Grey 

HB BODY U951 Autoflex Undercoating Spray 400ml Black is a professional rubberized underbody protective coating designed to protect automotive surfaces against stone chips, road debris, moisture and corrosion.

Its flexible, textured black coating provides a durable protective layer for vulnerable areas such as wheel arches, chassis components, sills, rocker panels and vehicle underbody surfaces. The convenient aerosol format makes U951 suitable for both professional body shops and automotive restoration applications.

Part # (5100700030 )

Key Features

• HB BODY U951 Autoflex
• Product Code: 5100700030 
• 400ml Aerosol
• Grey finish
• Rubberized underbody coating
• Flexible protective film
• Helps protect against stone chips
• Helps protect against road debris and abrasion
• Helps protect against moisture and corrosion
• Textured OEM-style appearance
• Suitable for automotive underbody applications
• Easy aerosol spray application
• Useful for repair, restoration and preventative protection

Ideal For

• Automotive Body Shops
• Professional Workshops
• Car Restoration
• Underbody Restoration
• Wheel Arches
• Rocker Panels
• Sills
• Chassis Areas
• Underbody Panels
• Mudguard/Inner Fender Areas
• Stone-Chip Protection
• Corrosion Protection

Benefits

Stone-Chip Protection

U951 creates a flexible protective layer that helps shield vulnerable automotive surfaces from stone impacts and road debris.

Rubberized Protective Coating

The rubberized formulation provides a flexible coating that is suitable for areas exposed to vibration, road debris and environmental conditions.

Helps Prevent Corrosion

By providing a protective barrier against moisture and environmental exposure, U951 helps protect suitable metal surfaces against corrosion.

Textured Black Finish

The black textured finish provides an OEM-style underbody appearance, making it suitable for restoration and body-repair applications where both protection and appearance are important.

Convenient Aerosol Application

The 400ml spray can makes application convenient without requiring a dedicated spray gun or compressor, making it practical for localized repairs and smaller projects.

How to Use

1. Thoroughly clean the surface and remove dirt, grease, oil and loose contamination.
2. Remove loose rust, flaking coating and unstable material where necessary.
3. Ensure the surface is completely clean and dry.
4. Mask surrounding areas that should not receive the coating.
5. Shake the aerosol can thoroughly before use.
6. Perform a small test application to check the desired texture and coverage.
7. Hold the can at a suitable spraying distance and apply an even, controlled coat.
8. Avoid applying excessively thick layers in a single pass.
9. Allow the coating to dry between coats if additional coverage is required.
10. Apply additional coats as necessary to achieve the required protection and texture.
11. Allow the coating to dry fully before exposing the vehicle to road conditions.

Pro Tip / Professional Automotive Tip

For the best result, surface preparation is more important than applying a heavy coating. Remove loose rust, old unstable undercoating, grease and contamination before application.

For an OEM-style finish, use several controlled coats rather than one heavy coat. This helps create a more uniform texture and reduces the risk of sagging or uneven buildup.

For professional body-shop work, ensure the substrate and primer system are fully compatible with the undercoating before application.

Suitable Applications / Compatibility

HB BODY U951 Autoflex is suitable for compatible automotive surfaces including:

• Vehicle Underbody
• Wheel Arches
• Inner Fenders
• Rocker Panels
• Sills
• Chassis Areas
• Underbody Panels
• Stone-Chip-Prone Areas
• Repaired Bodywork
• Restoration Projects

Metal Surfaces

Suitable prepared metal surfaces can be protected with undercoating where the coating system is compatible. Bare or repaired metal should be properly prepared and primed as required before applying the underbody coating.

Painted Surfaces

U951 can be used over compatible, properly prepared existing coatings. Always ensure the substrate is clean, dry and stable before application.

Plastic Surfaces

For plastic components, compatibility should be confirmed first. Plastic adhesion can vary depending on the substrate, so a suitable adhesion promoter may be required.

PPF & Ceramic Coating

Not intended for PPF or ceramic-coated automotive paint. This is an underbody/body-repair protective coating rather than a paint protection or detailing product.

Technical Specifications

What’s in the Package?

• 1 × HB BODY U951 Autoflex Undercoating Spray
• Colour: Grey
• Size: 400ml Aerosol Can

Safety & Precautions

• Use in a well-ventilated area.
• Keep away from flames, sparks, heat and other ignition sources.
• Aerosol container is pressurized; do not puncture or burn.
• Do not expose the can to excessive temperatures.
• Wear suitable gloves, eye protection and respiratory protection appropriate for spraying.
• Avoid breathing spray mist.
• Do not spray onto hot surfaces.
• Protect brake discs, brake pads, tyres, exhaust components and other safety-critical components from overspray.
• Do not apply over loose rust, dirt, grease or unstable old coating.
• Ensure adequate drying before exposing the vehicle to road conditions.
• Always verify compatibility with the existing substrate/coating system.
• Keep out of reach of children.

Why Choose This Product?

HB BODY U951 Autoflex provides a convenient professional solution for protecting vulnerable vehicle body and underbody areas from the harsh conditions encountered on the road.

Its rubberized formulation, flexible protective layer, black textured finish and aerosol application make it particularly useful for body shops, workshops, restoration projects and localized underbody repairs.

Why Buy from AutoHub Pakistan?

• 100% Genuine Products
• Fresh Manufacturing Stock
• Competitive Prices Across Pakistan
• Fast Nationwide Delivery
• Secure Online Shopping
• Expert Product Advice
• Complete Range of Premium Car Care Products
• Trusted by Professional Detailers & Enthusiasts

Frequently Asked Questions (FAQs)

What is HB BODY U951 Autoflex used for?

U951 is a rubberized underbody protective coating used to help protect automotive surfaces against stone chips, road debris, moisture and corrosion.

Can U951 be used on wheel arches?

Yes. Wheel arches and inner fender areas are common applications for protective undercoating, provided the substrate is properly prepared.

Can it be used on rocker panels and sills?

Yes. It can be used on suitable, properly prepared rocker panels and sill areas where additional stone-chip and environmental protection is required.

Does U951 provide stone-chip protection?

Yes. The flexible protective coating is designed to help protect vulnerable surfaces from stone chips and road debris.

Does it help prevent rust?

It helps protect suitable surfaces against moisture and environmental exposure, which can help reduce corrosion risk. Existing severe rust should be properly removed and treated before undercoating.

Is U951 waterproof?

The cured protective film is designed to provide resistance against environmental moisture, but proper surface preparation and application are essential for effective protection.

Can it be applied over bare metal?

Bare metal generally requires appropriate preparation and corrosion protection/primer according to the complete coating system before applying an underbody coating.

Can I apply it over existing undercoating?

Only if the existing coating is firmly bonded, clean, dry and compatible with U951. Loose or damaged old coating should be removed first.

Can U951 be used on PPF?

No. It is an automotive body/underbody coating and is not intended for PPF.

Can it be used on ceramic-coated paint?

No. U951 is not designed as a ceramic coating topper or paint protection product.

Does it require an air compressor?

The 400ml aerosol version is designed for direct spray application and does not require a separate spray gun or air compressor.

What colour is U951?

This version is Grey.

What size is this product?

This product contains 400ml.

HB BODY U951 Autoflex Undercoating Spray 400ml

• HB BODY U951 Pakistan
• HB BODY Autoflex U951
• U951 Undercoating Spray
• HB BODY Undercoating Black
• Automotive Undercoating Spray
• Car Underbody Coating
• Rubberized Undercoating
• Stone Chip Protection
• Automotive Stone Chip Coating
• Underbody Protection Spray
• Car Rust Protection
• Chassis Undercoating
• Wheel Arch Undercoating
• Rocker Panel Protection
• Automotive Body Protection
• Grey Underbody Coating
• HB BODY 5100200030