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🚗 Elevate your paint game with GRIP#4 — where flawless adhesion meets zero hassle!
U-POL GRIP#4 is a 12 oz aerosol adhesion promoter designed for automotive surfaces including plastics, aluminum, galvanized metal, zinc, painted surfaces, fiberglass, and body fillers. It eliminates the need for sanding, sprays evenly, and is compatible with most water and solvent-based paints. This low-odor formula creates a durable barrier against lifting and solvent attack, ensuring professional-grade, long-lasting paint adhesion and protection.

| ASIN | B00397POFC |
| Age Range Description | adult |
| Best Sellers Rank | #14,019 in Automotive ( See Top 100 in Automotive ) #8 in Automotive Primers |
| Brand | U-POL |
| Brand Name | U-POL |
| Color | Regular |
| Color Code | #FFFFFF |
| Container Type | Aerosol Can |
| Coverage | 12 sq ft/coat |
| Customer Reviews | 4.7 out of 5 stars 1,410 Reviews |
| Finish Type | Clear |
| Full Cure Time | 0.5 hours |
| Global Trade Identification Number | 00010796104202, 05010796104207 |
| Included Components | Aerosol |
| Indoor Outdoor Usage | Outdoor |
| Is Waterproof | False |
| Item Form | Liquid |
| Item Type Name | U-POL GRIP#4 Universal Adhesion Promoter 450 ml Aerosol |
| Item Volume | 450 ml |
| Item Weight | 0.1 kg |
| Manufacturer | U-Pol Products |
| Model Name | 0799 |
| Model Number | 0799 |
| Paint Type | Specialty |
| Part Number | 0799 |
| Size | 12 Fl Oz (Pack of 1) |
| Special Feature | Low Odor |
| Special Features | Low Odor |
| Specific Uses For Product | Automotive painting, Surface preparation |
| Surface Recommendation | Plastic, Aluminum, Galvanized Metal, Zinc, Painted Surfaces, Fiberglass, Body Fillers |
| Unit Count | 12 Fluid Ounces |
| Water Resistance Level | Water Resistant |
B**E
Does help the paint adhere to plastic surfaces.
Worked well to help paid adhere to the plastic. Without this, paint would easily scratch off the surface. Sanding is critical as well as cleaning prior to painting, however this is another important step in prepping the surface.
D**Z
Nice spray pattern
Can't go wrong with anything from this product
J**H
Upol Adhesion Promoter
Used this for places I needed to sand but couldn't get to it. Raptor lining my Truck
D**M
Good on metal, stay away from poly.
Had great adhesion on metals, on poly it made the finish come out fish eyed. I like Bulldog from Kleen Strip, but this stuff works good for urethane bedliners
R**.
Product is as advertised
Easy to use decent price I’m not sure. Really makes the paint adhere to the plastic any better
E**N
The right adhesion promoter for Raptor liner on polypropylene
I decided to paint the polypropylene fenders and side panels on my 13 year old KLR650 with Raptor liner. The sun had faded them to a dark pink. The instructions for the Raptor liner required the use of Grip #4 adhesion promoter. As far as I can tell it did exactly what it was supposed to do on a difficult to paint surface, which is to encourage a strong bond between the paint and surface. The stuff is water clear and and doesn't appear to have any solids in it. It's a mix of organic solvents that seem to slightly soften the plastic surface for 20 minutes or so. The stuff isn't cheap. Was it necessary? It's hard to know but the time for prep and the expense of the Raptor coating justified it in my eyes.
C**O
Excelente
Excelente
B**S
Sprayed Atv plastic before bedlining. Seemed to work good
I sprayed my atv plastic with it before bedlining it. Bedliner stuck to the plastic real good.
P**N
Ras
Parfait tres bon produit
P**L
Très bon produit que je recommande !
Je suis très satisfait de cet achat, ce primaire d'accrochage est un excellent produit et je le recommande sans hésitation.
R**D
Parfait
Ras
T**O
Produit reçu conforme et dans les temps
Produit entrant en base de préparation d'accroche pour travaux de peinture sur air soft platique/alu
Trustpilot
2 weeks ago
3 weeks ago