Sand Blast Kits for Pressure Washers

A wet sandblast kit turns the machine you already own into a rust and paint stripper. Water carries the abrasive, so you get blasting power without the dust cloud of dry blasting. Tell us your machine's GPM and PSI and we will match the kit orifice for you. Call 301-519-9274.

How a Wet Sandblast Kit Works and How to Size It

The kit replaces your spray nozzle with a blasting head. Water rushing through the orifice creates suction (the venturi effect) that pulls dry sand up a feed hose from a bucket, mixes it into the stream, and throws it at the surface. Because the media travels in water, airborne dust drops dramatically compared to dry blasting. Crews use these kits for rust on trailers and railings, peeling paint, graffiti on masonry, and knocking mill scale off steel before coating.

Sizing matters more than anything else on this page. The orifice in the blasting head works exactly like a spray nozzle orifice. Match it to your machine's flow. A 4.5 orifice suits machines around 4 GPM, and a 5.0 orifice suits machines around 5 GPM. Go too small and you spike system pressure and put the machine into bypass. Go too big and pressure falls off so far the sand just dribbles at the surface. Plan on a machine that makes at least 2.5 to 3 GPM and 2,500 PSI or better, because blasting performance comes from flow and pressure together.

Nozzle material decides how long the kit lasts. Abrasive eats brass, so a straight brass head is the budget option for occasional jobs. A carbide insert stands up to constant abrasive impact and is the piece to buy if you blast weekly. The carbide nozzle we stock also fits Arrowline sandblaster heads as a replacement, so you can rebuild a worn kit instead of replacing it.

Pick Your Kit

Call ahead for availability before you plan a blasting day around one of these.

Field Notes on Media and Technique

Use coarse, bone dry blasting media, never play sand or beach sand. Damp sand is the number one reason kits clog, so keep the bucket covered, set it a couple feet off the ground, and keep the suction hose from kinking. Wear a respirator anyway. Wet blasting knocks down dust but silica is nothing to gamble with. And plan your rust inhibitor before you start, because bare steel that leaves a wet blast flash rusts within the hour. Rinse the surface, then treat it right away.

Related Gear

• Sand blasting nozzles for replacements and spares
• Graffiti removal equipment and graffiti removers
• Concrete cleaning equipment
• 1/4 MEG nozzles to re-nozzle after blasting
• Pressure washer guns and lances
• Quick connects for fast attachment swaps

Prefer to see one first? Stop by the Gaithersburg store and we will walk you through the setup.

Frequently Asked Questions

What size pressure washer do I need for a sandblast kit?

Aim for at least 2.5 to 3 GPM and 2,500 PSI. Then match the kit orifice to your flow, a 4.5 orifice for roughly 4 GPM machines and a 5.0 for roughly 5 GPM machines.

What kind of sand works in a wet sandblaster?

Coarse, completely dry blasting media such as blasting sand or coal slag abrasive. Play sand and beach sand hold moisture and odd grain sizes, and they will clog the feed line fast.

Why does my sandblast kit keep clogging?

Damp media causes most clogs. Keep the sand covered and dry, raise the bucket off the ground, and check the suction hose for kinks. A worn or wet feed tip can also choke the media draw.

How do I stop flash rust after wet blasting steel?

Work in sections, rinse clean, and apply a rust inhibitor or primer within about an hour. Blasted steel is raw metal and it starts oxidizing almost immediately once the water dries.