303 Products Rubber Seal Protectant — Pack of 2 (3.4 fl oz) • Restores Flexibility & UV Protection

303 Rubber Seal Protectant is a concentrated formula that restores color and flexibility to aging rubber seals while providing UV defense and a non-greasy finish.

Whether your vehicle’s window gaskets, hood seals, trunk rubbers, or exterior trim have become dull, stiff, or cracked from sun exposure and weathering, this protectant is designed to renew and shield those surfaces. The fast-penetrating liquid absorbs into rubber, vinyl, and plastic to help recover pliability and refresh appearance without leaving oily residue. Packaged as two 3.4 fl. oz bottles, it’s sized for multiple applications and easy storage in a detailing kit or glove compartment.

How does 303 Rubber Seal Protectant improve old, dry seals?

The formula sinks into dried rubber to soften fibers and bring back original color, which can reduce sticking, creaking, and brittle edges. It doesn’t just sit on the surface; the active ingredients work below the top layer to restore flexibility and appearance.

• Penetrates rubber and vinyl to replenish flexibility
• Restores deeper color, reducing faded, dull look
• Helps prevent rubber from becoming brittle and cracking

Will it leave a greasy residue or attract dirt?

No—the protectant dries to a clean, non-greasy finish that keeps treated surfaces feeling dry to the touch. That finish minimizes dirt buildup and allows seals and trim to stay cleaner between applications.

• Non-oily drying formula for a neat appearance
• Reduces dust and grime adhesion compared with oily dressings
• Leaves a natural-looking sheen rather than an artificial shine

Can I use this on other parts besides seals?

Yes. In addition to door, window, hood, and trunk seals, the product is safe and effective on many rubber, vinyl, and plastic surfaces found inside and outside the vehicle. It’s also useful for restoring exterior trim pieces and interior molding without altering texture.

• Safe on rubber, vinyl, and most automotive plastics
• Works on exterior trim, interior molding, and weatherstripping
• Ideal for quick touch-ups and routine maintenance

How do I apply it for best results?

Application is straightforward: wipe a small amount onto the seal or trim and rub evenly to allow penetration. For very dry or heavily weathered areas, allow a short dwell time then reapply as needed until the rubber regains elasticity and color.

• Use a clean cloth or applicator to apply evenly
• Work the product into seams and folds for thorough coverage
• Allow to dry; repeat on heavily degraded rubber after initial treatment

Who this is for: If you own cars, trucks, SUVs, or even boats with rubber weatherstripping and exterior trim that have been dulled by sun and age, this protectant is suited to routine maintenance and restorative care. It appeals to DIY detailers, fleet managers, and anyone who wants to preserve seals to maintain fit, lessen wind noise and leaks, and keep vehicles looking well cared-for without greasy residues or complex procedures.