U-POL Adhesion Promoter spray Clear — Strong-Hold, fast-drying tie-coat for plastics & metal

U-POL Adhesion Promoter Strong-Hold Clear is a fast-drying spray primer that creates a durable bonding layer on metal, plastic, and painted automotive surfaces to help primers and topcoats adhere.

This clear adhesion promoter is designed for auto bodywork and general refinishing where different substrates meet—bumpers, fender liners, wheels, trim, and repair areas that are difficult to sand. It acts as a tie-coat between substrates and primer or topcoat, reducing lift and improving finish longevity while saving time on extensive mechanical abrasion. The formula is intended to be simple to apply from an aerosol can and to work across a wide range of materials commonly found in vehicles and equipment.

How does U-POL Adhesion Promoter help when working with mixed materials?

The promoter creates a consistent surface layer that primers and topcoats can grip to, especially on plastics and low-energy surfaces where paints normally struggle. By forming a bonding bridge it lowers the risk of peeling or delamination at material transitions.

• Works on plastic, vinyl, fiberglass, galvanized steel, aluminum and bare metal.
• Reduces the need to sand inaccessible or complex-shaped parts hard.
• Improves adhesion between old paint, fillers and new coatings.

What preparation and technique produce the best results?

Surface prep is essential: clean and degrease thoroughly, remove wax and contaminants, and lightly scuff glossy areas for optimal wetting. Mask adjacent panels to prevent overspray and allow each light coat to flash-dry according to recommended times before topcoating.

• Clean with an appropriate solvent or degreaser to remove oils and dirt.
• Lightly abrade high-gloss surfaces with fine grit sandpaper where accessible.
• Apply even, thin passes with the anti-clog spray nozzle for smooth coverage.

Will this product change the look or finish of my topcoat?

The promoter dries to a flat, clear film designed to accept primers and topcoats without noticeably altering color or gloss of the finished coating. It is formulated to be compatible with typical automotive primers and clear-coats when used as part of a proper refinishing process.

• Dries fast to a smooth, flat base that accepts primer or topcoat.
• Clear formulation minimizes color or gloss shift when overcoated correctly.
• Use compatible primers and follow recommended recoat windows for best results.

How durable is the adhesion and where should I use it?

The Strong-Hold formula is engineered to provide a protective bonding layer that resists lifting and separation across a variety of substrates. It's suitable for both repair touch-ups and larger refinishing projects where long-term adhesion is important.

• Protects vulnerable edges and joints from lifting on trim and bumpers.
• Effective for underhood parts, wheel arches, chassis areas and moldings.
• Minimizes failures over filler, bare metal, and previously painted areas.

Who is this for: U-POL Adhesion Promoter Strong-Hold Clear is aimed at professional auto body technicians, collision repair shops, restoration enthusiasts, and DIYers who need a reliable tie-coat for mixed-material surfaces. If your work involves plastic bumpers, composite panels, or repainting areas with differing substrates, this product simplifies preparation and strengthens the bond between old and new coatings while reducing sanding in hard-to-reach spots.