Graffiti removers come in two chemistries that need opposite seals: caustic and alkaline removers need a sprayer with EPDM seals, and solvent based gels and citrus removers need VITON (FKM). Put a caustic through a VITON sealed sprayer, or a solvent gel through an EPDM one, and the seals swell, harden or crack. It is a common and avoidable reason a sprayer stops holding pressure part-way through a job.
NORA PRO supplies the applicator, not the chemical. Councils, contract cleaners and facilities teams already have a remover on the shelf, so our job is to match the sprayer to it. EPDM sealed units for the caustic side, VITON sealed units for the solvent side, from 1.0L minis up to the 5.0L Gloria CLEAN 500. Send us the product name or the SDS and we will confirm the seal. Pricing is on quote.
Caustic and alkaline removers want EPDM
Caustic removers are sodium or potassium hydroxide based, and they are the usual choice on porous masonry, concrete, brick and render, because they break the paint down in the pores rather than just softening it on the face. Strong alkalis attack VITON, so this side of the job needs EPDM right through the unit, including the trigger and the nozzle O-ring.
Two units cover most of this work. The CLEAN 500 5.0L Industrial Grade Poly Sprayer, Alkaline Resistant from Gloria holds 5.0L in a 7.0L tank on EPDM seals, with a plastic lance with extension and a plastic flat jet nozzle that sheets a remover onto a wall evenly. The 1.2L Alkaline Resistant Pressure Sprayer from Klager takes 1,200mL of liquid and suits spot work: one tag on a bollard, a door, a bin surround. Both list graffiti removal in their own application data.
The chemistry behind this side of the range is covered in alkaline-resistant sprayers.
Solvent gels and citrus removers want VITON
Solvent-based gel removers and d-limonene citrus products are the usual choice on smooth and non-porous surfaces, where a caustic would eat into the finish. Powder-coated and prepainted steel, signage, glass, sealed render. Most of these products are petroleum or terpene based, which points to VITON (FKM), but confirm the specific remover against its SDS. Test a small area first as well, because a strong solvent can lift the coating under the paint you are trying to remove.
For close work, the 1.0L and 1.5L Solvent Resistant minis from Klager cover spot jobs, and the 1.0L Superior steps up to higher-grade FKM-80 seals for the more aggressive petroleum solvents. For long wall runs, the Gloria PRO 500 or PRO 8 with VITON seals suits most petroleum and citrus removers. None of these suit acetone or MEK strippers.
Worth reading twice: no single sprayer covers both sides. The caustic side needs its own EPDM unit, and the solvent side needs a VITON solvent build, not just any sprayer with VITON seals. See solvent-resistant sprayers for the solvent range.
Why most graffiti crews end up with two sprayers
A contractor on a council route does not get to pick the surface. Brick fence at one stop, powder-coated substation at the next. Both chemistries travel in the ute, and no single seal covers both properly, so two sprayers is the honest answer rather than an upsell.
Label them and keep them apart. Decanting a caustic into yesterday's solvent tank is how a good unit gets written off. If the two chemistries share a hose or a spare lance, that shared part is the one that fails first. The same discipline applies across the rest of a commercial cleaning kit.
One case catches people out. Some heavy paint strippers are acetone or MEK based, and ketones swell standard VITON seals. Klager does not recommend any standard sprayer, including the standard EPDM model, for pure acetone. If your stripper blends 20 to 50% acetone with solvents, use the specialist Klager 1.2L Master Solve+. For pure acetone or MEK, ask us about the Klager Master Clean+, and send us the SDS if you are unsure. You can also check the Chemical Compatibility Guide.
Capacity, tank and keeping it serviceable
Match the size to the route, not to the biggest job you can picture.
- 1.0L to 1.5L mini. Spot tags, bollards, signage, lift interiors. Also the sensible size for whichever chemistry you reach for less often.
- 5.0L poly. The everyday unit for caustic removers, the Gloria CLEAN 500 with EPDM seals. Enough for route work without stopping to refill, and light enough to carry up a stair.
- 5.0L or 8.0L poly for solvent removers. The Gloria PRO 500 or PRO 8 with VITON seals for long runs with petroleum or citrus removers. Not for caustic removers or acetone.
Triggers and seals are the parts that wear out first on graffiti work. Replace the part rather than the sprayer. The Alkaline Resistant Trigger with EPDM Seals and the matching VITON components are stocked as genuine parts and seal kits. NORA PRO is the exclusive Australia and New Zealand distributor for Klager. Gloria is supplied and stocked from Brisbane.
Request a quote and tell us the remover you run, or send the SDS, and we will spec the seal. Councils, contract cleaners and chemical resellers, apply for a trade account for wholesale supply and custom labelling.
Frequently asked questions
What sprayer do I need for graffiti remover?
It depends on the chemistry of the remover. Caustic and alkaline removers, used on masonry, concrete and brick, need a sprayer with EPDM seals. Solvent-based gel and citrus removers, used on coated and non-porous surfaces, need VITON (FKM) seals. Check the label or the SDS, and we will confirm the seal.
Can one sprayer handle both types of graffiti remover?
Not reliably. The two chemistries need opposite seal materials, so most graffiti contractors carry two units, one EPDM and one VITON, labelled and never decanted into each other.
What seal resists caustic graffiti remover on brick and concrete?
EPDM. It stands up to the sodium and potassium hydroxide based removers used on porous masonry, where VITON would harden and crack.
Which sprayer suits a solvent-based or citrus graffiti remover?
A VITON (FKM) sealed solvent sprayer, such as the Klager 1.0L or 1.5L Solvent Resistant, or the Gloria PRO 500 or PRO 8 for larger jobs. One exception: if the stripper contains acetone or MEK, use the Klager 1.2L Master Solve+ for 20 to 50% acetone blends, or ask us about the Klager Master Clean+ for pure acetone or MEK.
Does NORA PRO sell graffiti removal chemicals?
No. NORA PRO supplies the applicators: sprayers, lances, triggers and seal kits. Tell us the remover you already use, or send the SDS, and we will match the seal to it.