The official Hull Pro reset cleaner — safe on your coating
What Shark Gel does
✓ Removes rust and oxidation from trim tabs, brackets, and metal surfaces
✓ Dissolves stubborn growth on Hull Pro-treated hulls — safe on the coating
✓ Thick gel clings to vertical surfaces — no dripping, no waste
✓ Phosphoric acid formula — no hydrochloric acid, safer for marine use
✗ Do not use on bare gelcoat, bare wood, or ceramic coatings — metal and Hull Pro surfaces only
Shark Gel is a light phosphoric acid cleaner in gel form. The gel formulation is intentional — it adheres to vertical surfaces and stays in contact with the problem area while it works, instead of running off like a liquid cleaner.
It was developed with Hull Pro in mind — it is the recommended reset cleaner for Hull Pro-coated hulls and will not damage the coating. It also handles rust and oxidation on the stainless and metal surfaces that every boat owner deals with: trim tabs, railings, prop shafts, and pontoon and tritoon frames.
No hydrochloric acid. No bleach. No additional chemicals needed. Apply, dwell, wipe or rinse.
Use Shark Gel on
Do NOT use Shark Gel on
Always test a small area before full application.
✓ Adheres to vertical surfaces — railings, transoms, trim tabs — without running off
✓ No overapplication waste — gel stays where applied
✓ Fast-acting — dwell up to 5 minutes, then wipe or rinse
✓ No hydrochloric acid — less volatile, no harsh fumes under normal use
Safety — read before use
Always test a small area before full application.
See it in action
A real reset cleaning documented after 8 months in the water. Shark Gel applied to the Hull Pro-coated hull — growth removed without damaging the coating, hull reset and ready for another season.
Read the full case study→
We’ve collected some of the most frequently asked questions about Shark Gel. Below are some of the most commonly asked questions about our product, application, and care and maintenance.
No, Shark Gel will not harm your gel coated or Hull Pro or coated vessel! Feel free to apply directly to your Hull Pro-protected vessel where you find rust or oxidation and see instant results. Do NOT apply Shark Gel directly to bare gelcoat or an uncoated hull as this may etch the surface.
NO. You should use Shark Gel on bare metal surfaces or a Hull Pro-treated hull. Do NOT use Shark Gel on ceramic as it will etch the surface. Do NOT use Shark Gel near natural wood as it will permanently stain wood surfaces. It is always important to test a small area to ensure Shark Gel’s compatibility prior to application.
Unlike spray-on or liquid cleaners, Shark Gel is a thick, clear gel. This makes it easier to apply for vertical or slanted surfaces without dripping. Because the gel adheres better to these surfaces, Shark Gel works without having users waste the product by overapplying.
Yes. It is important that Shark Gel is applied with caution and the correct PPE. Always apply while wearing gloves in a well ventilated environment. Do not inhale or ingest and avoid contact with skin. See our Safety Data Sheet here. If contact with the skin is made, skin irritation may occur. Wash the affected area thoroughly with soap and water.
No. Shark Gel has been used in the construction industry as well to clean rust and stains from concrete hardscapes, but we have seen amazing results when using Shark Gel in the marine industry, specifically with trim tabs and to clean growth off of a Hull Pro-treated hull.
No. Unlike other market competitors, Shark Gel contains no hydrochloric acid. Hydrochloric acid is very harsh, may contain harmful fumes and vapors during application, and may cause chemical burns if not used with the proper safety precautions. Shark Gel’s active ingredient is phosphoric acid, which is less volatile to use, but still fast-acting enough to get the job done!
Still have additional questions? Contact us below. We’re here to help!
Product Sheet
Technical Data Sheet
Safety Data Sheet
Application Guide
Care & Maintenance| Type |
Liquid gel |
| Color |
Clear |
| pH |
0.3 ± 0.2 |
| Density |
1.35 ± 0.05 kg/L |
| Viscosity |
80 ± 0.5cP @ 68°F (20°C) |
| Coverage (Single-application) |
1 gallon covers ~350 sqft |
| Application Temperature |
41-95°F (5-35°C) |
| Substrate Application Temperature |
41-95°F (5-35°C) |
| Application Conditions |
~72 h @ 68°F (20°C) (48 hours after full cure) |
CONVERSION PRIMER THAT PROTECTS FROM CORROSION AND HULL OSMOSIS
CONVERSION PRIMER THAT PROTECTS FROM CORROSION AND HULL OSMOSIS
DURABLE 2-PART SILICONE EPOXY PERFORMANCE COATING
DURABLE 2-PART SILICONE EPOXY PERFORMANCE COATING
