Metal Casting Repair Adhesive
50ml
$10.00 AUD
Novva Living · Tools
Metal Casting Repair Adhesive.
Repair the casting, not the scrap pile.
A high-temperature adhesive for filling sand holes, air pockets and cracks in metal castings — restoring the part without the heat distortion welding introduces. By RayHong, in 50ml and 100ml.
Hi-TempResistant
3Defect Types
0Welding Required
2Sizes
Clean and degrease the defect first — surface preparation decides whether the bond holds.
01
No Heat, So No Distortion
Welding a casting introduces a heat-affected zone, changes the metallurgy around the repair, and can warp a part that was dimensionally correct. Adhesive repair avoids all of it — no heat input, no post-weld grinding, no risk of the repair causing a second problem elsewhere on the part.
02
It Fills the Defects Castings Actually Have
Sand holes from the casting process, air pockets that weaken the structure, and cracks that open up under load or thermal cycling. These are the defects that make a casting look like scrap — and they are exactly what this is formulated to fill.
03
Works Where Welding Cannot
High-silicon cast iron, aluminium castings, complex geometry where a torch cannot safely reach — these are the cases where welding is difficult, risky or simply not possible. Adhesive repair gives you a route back to a working part without specialist equipment or a specialist welder.
04
Two Sizes for Two Kinds of Job
50ml for a single defect or an occasional repair, where you would rather not leave most of a tube to cure in the container. 100ml for larger repairs, multiple defects on one part, or a workshop that repairs castings regularly and wants a supply on the shelf.
Adhesive or Welding
When to reach for this, and when not to
The honest dividing line, because this is a repair product and the wrong call matters.
Adhesive suitsSmall to medium defects · castings that cannot take weld heat · high-silicon cast iron and aluminium · fast return to service
Welding suitsLarge structural defects · repairs under heavy mechanical load · anything a standard or safety code requires to be welded
Not forSafety-critical structural repairs — consult an engineer before relying on an adhesive repair
Temperature ratingNot stated on this listing — described as high-temperature resistant; check the product packaging for the actual figure
"High-temperature resistant" is a real property, but it is not a number. If your part runs hot, get the actual temperature rating from the packaging before you commit to the repair — an adhesive that softens at 120°C is a very different proposition from one rated to 300°C.
Which to Choose
Adhesive repair, or weld repair?
Both can restore a casting. One of them changes the metal around the repair.
This Adhesive
- No heat-affected zone — the surrounding metal is unchanged
- No specialist equipment or welder needed
- No post-weld grinding, cleaning or inspection
- Limited to small and medium, non-safety-critical defects
Weld Repair
- Strongest option for large structural defects
- Introduces heat — distortion and metallurgical change
- Needs the right equipment and a competent welder
- Required where a code or standard says so
Fills the defect without the heat that distorts the part — a casting you were about to scrap, back in service.
In the Box
1 × Metal Casting Repair Adhesive — 50ml or 100ml
Who It’s For
Engineers, machinists and workshop owners repairing casting defects without sending parts out for welding, and competent DIY metalworkers restoring tools and machinery.
Product Specifications
BrandRayHong
PropertiesHigh-temperature resistant · strong bonding
ApplicationSand holes · air pockets · cracks in metal castings
Sizes50 ml · 100 ml
Temperature ratingNot stated on this listing — described as high-temperature resistant; check the product packaging
Best forEngineers · machinists · industrial repair · DIY metal repair
In the box1 × Metal Casting Repair Adhesive (50ml or 100ml)
Not for safety-critical structural repairs — consult an engineer first.
Applying It, Choosing an Approach & Storage
- Clean the repair area thoroughly. Remove all oil, grease, loose scale, rust and contamination from both the surface and inside the defect. A clean, dry, roughened surface is the single biggest factor in whether the bond holds.
- Open the defect slightly if needed so the adhesive can fully penetrate. A skin of adhesive over a hollow void is not a structural repair — it is a cover-up that will fail.
- Work the adhesive into the defect and overfill slightly to allow for minor shrinkage while curing, then level or shape as required before it sets.
- For cracks, apply from one end and work progressively along, so the adhesive penetrates the full depth rather than bridging the surface and leaving the crack open underneath.
- Allow it to cure fully before the part goes back into service. Do not apply heat to speed curing unless the packaging specifically says you can.
Surface preparation matters more than any other step. The same adhesive on a properly prepared surface will outperform itself on a contaminated one by a wide margin.
- Use adhesive when: the defect is small to medium, the part cannot be welded without heat distortion, welding equipment is not available, the alloy is difficult to weld — high-silicon cast iron being the classic case — or you need the part back in service without post-weld finishing.
- Use welding when: the defect is large and structural, the part carries heavy mechanical load at the repair point, or a standard or safety code specifically requires a welded repair.
- Adhesive repair suits cast iron, aluminium castings and complex-geometry parts where weld distortion would cause dimensional problems or need extensive post-weld machining.
For safety-critical structural repairs, consult an engineer before proceeding. This product is designed for maintenance and restoration of non-safety-critical casting defects.
- Store cool and dry, out of direct sunlight and away from heat sources. Warm storage accelerates the chemical ageing of the adhesive and shortens its shelf life.
- Seal the container tightly after every use. Air exposure starts the curing process inside the container and eats into the remaining shelf life.
- Do not freeze — freezing affects the consistency and the bonding performance.
- If it has been stored a while, check for any change in consistency, colour or smell before use. Adhesive that has partially cured in the container should not be used for a structural repair.
A tube that has been open for months is worth testing on a scrap piece before you commit it to the actual repair.
- 50ml: the right choice for a single repair, a small defect, or occasional use where you would rather not leave most of a tube to cure unused. Enough for most small casting defects, and a sensible first purchase to see how the product behaves on your application.
- 100ml: better value per millilitre for larger repairs, several defects on one part, or regular workshop use where having a supply on the shelf avoids reordering delays.
- The difference in price between the two sizes is small — if there is any chance you will need more than a little, take the 100ml.
Adhesive is a consumable and it does not keep forever once opened. Buying the size you will actually use in one go beats buying small and having the rest go off.
Fill it. Bond it. Hold it.
“A high-temperature adhesive that fills sand holes, air pockets and cracks — a casting you were about to scrap, back in service.”
Clean the defect properly first — that is what makes the bond hold.
Hi-Temp
Fills Defects
No Welding
50 & 100ml
Metal Casting Repair Adhesive
$10.00