Road salt from October to March
Local authorities salt the national and regional network right through winter. Salt spray gets thrown up into chassis rails, sill seams and suspension mounts, and it keeps working long after the road dries.
Undersealing Specialists — All 32 Counties
Undersealing Ireland
Irish salt and damp eat underbody steel from the inside out. We strip the underside back, treat the corrosion, weld what needs welding, then seal the chassis, floor pan and box sections properly — cars, 4x4s, vans, campers and commercials.
What's included
Our undersealing process
The prep is what makes a coating last. Anyone can spray black over a dirty chassis — that traps moisture and makes things worse. Here's what actually happens to your vehicle.
- Full underbody degrease and high-pressure wash
- Dried out and inspected on the ramp with you
- Surface rust treated back to sound metal
- Any holed or weak steel cut out and welded
- Chassis rails, sills and floor pan sealed
- Cavity wax injected into enclosed box sections
- Brake lines, fuel lines and moving parts masked
- Photos of the finished underside before collection
Why here, why now
Why undersealing matters more in Ireland
Underbody rust isn't bad luck — it's the predictable result of salt, damp and mud sitting on bare steel. These are the four things that put Irish vehicles on the welding ramp early.
Damp coastal air year round
Most of Ireland sits within an hour of the coast. Constant humidity means underbody steel rarely dries out fully, so corrosion continues in months other countries would call summer.
Boggy lanes and farm traffic
Mud packs into box sections and holds moisture against bare metal for weeks. It's why 4x4s, pickups and agricultural vehicles rot from the inside out here far faster than mileage suggests.
Imports arriving unprotected
Japanese and UK imports usually land with no underbody protection at all. Sealing on arrival is the cheapest chassis work you will ever pay for on that vehicle.
Step by step
From photo to finished underside
- 1
Send photos
WhatsApp a few photos of the underside. We come back the same day with an honest read on what's needed.
- 2
Free chassis inspection
Vehicle up on the ramp in Wexford, walked through with you. Nothing is agreed before you see it.
- 3
Clean and treat
Degrease, high-pressure wash, dry out, then treat corrosion back to sound metal.
- 4
Weld if needed
Holed or weak steel is cut out and welded to NCT standard before any coating goes near it.
- 5
Seal and wax
Chassis, floor pan and sills sealed; cavity wax injected into enclosed sections.
- 6
Photos and collection
Finished underside photographed and sent to you, usually same day.
Not sure whether your vehicle needs sealing or welding? Book a free chassis check or read the undersealing cost factors that decide the quote.
Real undersealing work
Every photo is real Rayco work — no stock images.
By vehicle
Undersealing by vehicle type
4x4 UndersealingVan UndersealingSUV UndersealingPickup UndersealingCampervan UndersealingMotorhome UndersealingClassic Car UndersealingHorsebox UndersealingTrailer UndersealingFleet UndersealingLand Cruiser UndersealHilux Underseal & Repair
Related rust protection services
Undersealing Near MeRustproofing IrelandRust Protection IrelandUnderbody ProtectionWaxoyl / Waxoil AlternativeChassis Welding IrelandFree Chassis Check
Undersealing by county
We take undersealing work from all 32 counties.
Undersealing WexfordUndersealing WicklowUndersealing CarlowUndersealing KilkennyUndersealing WaterfordUndersealing DublinUndersealing KildareUndersealing MeathUndersealing LouthUndersealing CorkUndersealing KerryUndersealing LimerickUndersealing ClareUndersealing TipperaryUndersealing GalwayUndersealing MayoUndersealing SligoUndersealing LeitrimUndersealing RoscommonUndersealing DonegalUndersealing MonaghanUndersealing CavanUndersealing LongfordUndersealing WestmeathUndersealing OffalyUndersealing LaoisUndersealing AntrimUndersealing ArmaghUndersealing DownUndersealing FermanaghUndersealing TyroneUndersealing Derry
FAQs
Undersealing questions
What is undersealing?
Undersealing is cleaning the underside of a vehicle back, treating any corrosion, then coating the chassis, floor pan and box sections with a protective sealant so salt and water can't reach the steel.
How do I get an undersealing quote?
Every vehicle is assessed individually because size and chassis condition affect the work required. Send WhatsApp photos before you travel or book a free chassis inspection for an accurate quote.
How long does undersealing last?
A properly prepared and coated underside lasts years, not months. The prep is what decides it — coating over dirt or live rust will always fail early, which is why we degrease, wash, dry and treat before anything is sprayed.
Is undersealing worth it in Ireland?
Irish roads are salted through winter and coastal air is damp year round, so underbody steel corrodes faster here than in drier climates. Sealing a sound chassis is far cheaper than welding a rotten one later.
Can you underseal a vehicle that already has rust?
Yes — surface rust is treated and sealed. Where metal is holed or structurally weak, it is cut out and welded first, then coated. We never spray over rot.
Do you do undersealing near me?
We take vehicles from all 32 counties into the yard in Wexford, and customers regularly travel from Dublin, Cork, Galway and the midlands for a day's work.
How long does a vehicle need to be left in?
Most cars, vans and 4x4s are a full day. If welding or heavier rust treatment is needed, it can run to two or three days — we confirm the timeline after the inspection, before any work starts.
What is the best time of year to underseal a car in Ireland?
Late summer and early autumn are ideal, so the coating is fully cured before the salt goes down on the roads. Work through winter is still worthwhile — the underside just needs longer to dry out before spraying.
Does undersealing help with the NCT?
It won't hide a fail, but it prevents one. NCT failures for corrosion come from perforated or weakened structural metal; sealing sound steel stops that decay before it becomes a fail item, and we weld what is already gone.
Is undersealing the same as rustproofing?
They overlap. Undersealing is the sprayed protective coating on the exposed underside; rustproofing usually also means injecting cavity wax into enclosed box sections, sills and doors. We do both on a full treatment.
Get an Undersealing Quote
Send WhatsApp photos of your underside and we'll quote before you travel.