Paint hydraulic housings and cylinders

Guided shopping manual

Guide to painting hydraulic housings and cylinders

Hydraulic housings and cylinder bodies need precise masking, careful cleaning and a compatible primer and topcoat so the paint protects the outside without interfering with moving or sealed parts.

What do you need to paint hydraulic housings and cylinders?

Cleaning and degreasing

Mipa silicone remover and Mipa silicone remover spray remove wax, grease and silicone before sanding, priming or coating.

Sanding pad

MP Sanding Pad helps key curves, edges and awkward metal shapes so the primer has a cleaner mechanical grip.

PU acrylic primer

Mipa PU 100-20 gives steel, zinc and aluminium an active corrosion-protection primer layer before compatible 2K PU topcoats.

Semi-gloss PU topcoat

Mipa PU 250-50 gives workshop metal, housings and equipment panels a semi-gloss 2K PU finish in selected colour groups.

PUR Plus hardener

Mipa PUR Plus Hardener A60 supports the relevant 2K PU coating stage where the anti-slip or semi-gloss system requires it.

PU hardener and thinner

Mipa PU 912-25 normal, Mipa PU 914-10 short and Mipa 2K Thinner Normal V 25 support correct curing and spray viscosity for the compatible 2K PU coatings.

How to paint hydraulic housings and cylinders

1
Mask functional areas

Cover rods, seals, ports, threads, labels and sliding or mating surfaces before cleaning or sanding.
2
Degrease the housing

Use silicone remover to remove oil film and handling contamination from the cylinder body or hydraulic housing.
3
Key and prime the metal

Sand sound coating and exposed metal, then apply Mipa PU 100-20 where a corrosion-protection primer is needed.
4
Apply the semi-gloss topcoat

Use Mipa PU 250-50 with the compatible hardener and thinner for a durable 2K PU colour finish.
5
Remove masking carefully

Pull masking at the right stage and inspect edges around ports, seals and mounting points before the component goes back into service.

Which hydraulic part coating products should you choose?

Choose PU 100-20 for the primer

Use the PU acrylic primer on prepared steel, zinc or aluminium housing sections before the topcoat.

Choose PU 250-50 for the colour coat

Use the semi-gloss PU topcoat where the housing or cylinder body needs a clean industrial finish.

Choose careful masking over heavy film build

Keep coating away from rods, seals and precision-fit areas so the hydraulic function is not affected.

Technical details

Mipa PU 100-20 is listed as a 2K PU acrylic primer with active corrosion protection and excellent adhesion on steel, zinc and aluminium.
Mipa PU 250-50 is listed as a semi-gloss 2K PU topcoat in price groups I, II and III.
The PU coating system uses Mipa 2K Thinner Normal V 25 and compatible PU hardener choices from the listed products.
Hydraulic rods, seals, ports and nameplates should not receive paint film because coating buildup can interfere with service and inspection.

Practical suggestion

Paint only the external housing or cylinder body; leave chrome rods, seal lips, breather points, grease nipples and machined faces completely clear.