Chemical Guys Bug & Tar Heavy Duty Car Wash Shampoo
Priced as of May 6, 2026
4.4(7,636 ratings)Subscribe & Save: $40.49 (10% off)Buy on AmazonAs an Amazon Associate and affiliate partner, CarCareTruth earns from qualifying purchases. Full disclosure
Prices may varyCarCareTruth's Analysis
Last reviewed 2026-05-07
TL;DR Mild surfactant concentrate that handles fresh bugs and tar as part of a normal 2-bucket wash workflow with no harsh chemistry — but baked-on residue may need extended dwell or a follow-up product. Good fit for the home detailer who washes regularly and wants one product for the wash plus the bumper.
What it is and how it performs
This is a heavy-duty car wash shampoo that doubles as a bug and tar remover, sold as a 64 oz concentrate. Mix 1 oz per gallon for routine washing, 2-3 oz per gallon as a pre-wash spray for heavier residue. Spray, dwell briefly, then wash with the same product in a 2-bucket setup. Community on r/AutoDetailing and Autogeek broadly confirms effective single-pass cleaning on fresh bug residue and tar splatter at the recommended pre-wash dilution. Baked-on residue (multi-day weathered tar) is its honest limitation — for that, an aerosol cling-foam product clears faster. The dual-purpose value is real: one product handles weekly washing and bug season without a separate decontamination step.
Who should buy this — and who should skip it
Buy it if you wash your vehicle weekly to monthly and want a single product for the wash plus fresh bug and tar capability. Skip it if you mostly deal with weathered tar or baked-on residue — for that, a solvent-aerosol product (Stoner Tarminator, 3M 38983) clears the residue faster, accepting the petroleum-solvent chemistry trade-off.
Safety and environmental impact
The SDS assigns a WARNING signal word with H319 (serious eye irritation), H303 (acute oral toxicity Cat 5 — may be harmful if swallowed), and H313 (may be harmful in contact with skin) classifications driven by the sodium metasilicate alkaline builder and the surfactant package. No DANGER, no petroleum solvent, no aerosol propellant, no asthmagen, no Prop 65. The formula contains ethylene glycol monobutyl ether at low concentration — an aquatic toxicant flagged for the storm-drain pathway when the wash water rinses to driveway drain. No EPA Safer Choice certification or confirmed biodegradability.
Frequently asked questions
Is this a wash soap or a dedicated bug and tar remover?▾
Both. Chemical Guys positions CWS_104 as a heavy-duty car wash shampoo with bug and tar removal built in — buyers use it as their primary wash soap on heavily-soiled vehicles. For spot-treatment of baked-on tar, an aerosol product (Stoner Tarminator) works faster, but CWS_104 handles fresh bugs and tar splatter as part of normal weekly washing without the petroleum-solvent exposure trade-off.
What dilution should I use for bug and tar removal?▾
Chemical Guys recommends 1 oz per gallon of water for general washing. For heavy bug or tar residue, increase to 2-3 oz per gallon as a pre-wash spray, dwell briefly, then wash. Community on r/AutoDetailing reports good results at the standard wash dilution for fresh residue and the stronger pre-wash dilution for stuck-on residue.
Will it strip wax or sealant?▾
The alkaline pH and metasilicate builder can degrade some wax layers at the heavier-duty pre-wash dilution; community on r/AutoDetailing recommends keeping the wash dilution at 1 oz/gal on waxed vehicles. For ceramic-coated paint, the formula is generally compatible at standard dilution but avoid the heavier pre-wash strength to maintain coating hydrophobics.
Is it safe on plastic trim and rubber?▾
Yes at recommended dilution — community confirms it's safe on common plastic trim, rubber seals, and headlight lenses without the dehydration or blanching concerns associated with petroleum-solvent aerosols. The aqueous-surfactant chemistry doesn't have the trim-damage profile that solvent-based products carry.
Does it remove sap and bird droppings?▾
Fresh sap and bird droppings yes — within hours of deposition, normal wash strength clears them. For dried sap or etched bird-dropping residue (paint damage from acid attack), the wash chemistry helps but may not fully restore the surface; that requires polish or compound.
From the manufacturer
Marketing copy from Chemical Guys, via Amazon. Not editorial.
- •Safely Removes Stubborn Bugs & Tar: Eliminate stuck-on bug guts, tar, grime, sap, and bird droppings with ease, leaving your vehicle’s paint and surfaces spotless and protected.
- •Concentrated Cleaning Power: A single capful of Chemical Guys Bug & Tar Wash mixes with 1 gallon of water, providing a powerful clean for cars, trucks, RVs, SUVs, motorcycles, and more.
- •Protects Against Paint Damage: The advanced formula dissolves acidic residues from bugs and tar, preventing permanent etching, stains, or scratches on your vehicle’s clear coat or single-stage paint.
- •Works on All Exterior Surfaces: Safe and effective on paint, glass, chrome, plastic, grilles, headlights, bumpers, and windshields, ensuring a thorough clean for any type of vehicle.
- •Easy Pre-Wash Solution: Loosens debris like bugs and tar before washing, saving time and reducing the need for heavy scrubbing, which helps prevent swirls and scratches on your vehicle.
- •Versatile Application Methods: Use with a foam cannon, foam gun, or wash bucket for a full vehicle wash, or dilute 6:1 in a spray bottle for spot-cleaning hard-to-reach areas.
- •Perfect for Heavy-Duty Vehicles: Ideal for truckers, RV owners, commuters, and couriers dealing with heavy bug buildup and tar from long-distance travel or challenging road conditions.
- •Gentle Yet Heavy-Duty Formula: Free of harsh chemicals, this water-based solution effectively tackles tough messes while being gentle on your vehicle’s surfaces and environmentally friendly.
- •Essential for Bug-Prone Areas: Designed for drivers in regions with high insect activity, this powerful cleaner keeps your vehicle free of bug guts, grime, and tar, no matter where you travel.
- •Ultimate Cleaning Solution: Enhance your car wash routine with this multipurpose bug and tar remover, delivering professional results and a showroom shine to every vehicle you own.
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Manufacturer videos
Manufacturer images
Manufacturer specifications
- Brand
- Chemical Guys
- Item Form
- Liquid
- Scent
- Citrus
- Specific Uses For Product
- Vehicle Exterior (Car, Truck, SUV, Jeep, RV & More)
- Material Feature
- Concentrated, Scented
- Surface Recommendation
- Vehicle Exterior (Car, Truck, SUV, Jeep, RV & More)
- Special Features
- A single capful of Chemical Guys Bug & Tar Wash mixes with 1 gallon of water, providing a powerful clean for cars, trucks, RVs, SUVs, motorcycles, and more
- Contains Liquid Contents?
- Yes
- Material Features
- Concentrated, Scented
- Item Volume
- 64 Fluid Ounces
- Unit Count
- 64.0 Fluid Ounces
- Number of Items
- 1
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Top Amazon review
↗External — Amazon's most-helpful review for context.
Removes Bugs 🐛 easy!
Great product. I live in the South and it’s love bug season. If you don’t remove them in 24 hours or so they will eat your paint. This stuff takes them right off with very little effort! Used a microfiber cloth and it does the trick. Recommend it!