Fuel bills are too high
Check the condition of the hot face, gaps, and how hot the outer shell runs.
Ceramic fibreinsulatingInsulating Castable
Zenco Engineering · Trusted industrial supplier
Heat held in.
Heat held in.
Noise kept down.
A trusted supplier of refractories, insulation, acoustics and sealing for industrial plant.
- Contain heatRefractories and insulation
- Absorb noiseAcoustic mineral wool
- Seal the lineGaskets for steam, oil, acid
- Establishedindustrial materials supplier
- 39 productsacross 6 product ranges
- Data sheetswith every quote
- Engineer-ledadvice on every enquiry
Shop by category
Line it. Insulate it. Seal it.
6 categories, 39 products. Pick one to browse, compare and build a quote.
01
10 products
Refractory materials
Bricks and shapes for the hottest zones
02
6 products
Refractory cement and castables
Cast, patch and joint linings
03
9 products
Thermal insulation
Keep heat in and surfaces safe
04
3 products
Acoustic insulation
Quieter plant rooms and ducts
05
6 products
Gaskets and sealing
Sealing for steam, oil and acid
06
5 products
Industrial insulation
Insulation for plant and pipework
The full range
Every product, one swipe.
01 / 39
1,450°C 01
Refractory materials
Fire Bricks
Dense fireclay bricks for furnace, kiln and boiler linings. Price on requestView
1,450°C 02
Refractory materials
40% Alumina Fire Bricks
General-purpose lining for furnaces and kilns. Price on requestView
1,700°C 03
Refractory materials
70% Alumina Fire Bricks
For hotter, more demanding zones and heavier wear. Price on requestView
1,700°C 04
Refractory materials
High Alumina Refractory Bricks
Higher temperature and load capability than standard firebrick. Price on requestView
2,000°C 05
Refractory materials
Zirconia Refractory Bricks
For the harshest heat and corrosion, such as glass contact. Price on requestView
06
Refractory materials
Glass Furnace Refractory Bricks
Built for glass-furnace linings and molten-glass contact. Price on requestView
07
Refractory materials
Fire Slabs
Flat refractory slabs for hearths, floors and shelves. Price on requestView
08
Refractory materials
Fire Splits
Thin split bricks for lining where thickness is limited. Price on requestView
09
Refractory materials
End Arch Bricks
Shaped bricks for the ends of furnace and kiln arches. Price on requestView
10
Refractory materials
Side Arch Bricks
Shaped bricks for the sides of furnace and kiln arches. Price on requestView
11
Refractory cement and castables
MaxHeat A
Refractory cement product for linings, patching and repairs. Price on requestView
12
Refractory cement and castables
MaxHeat K
Refractory cement product for linings, patching and repairs. Price on requestView
13
Refractory cement and castables
MaxSet 50 Fine
Fine-grade refractory product for casting and repairs. Price on requestView
14
Refractory cement and castables
MaxLyte 11
Refractory castable for casting linings and repairs. Price on requestView
15
Refractory cement and castables
Refractory Mortar
Mortar for jointing refractory brickwork. Price on requestView
16
Refractory cement and castables
Insulating Castable
Lightweight castable that saves heat behind the hot face. Price on requestView
1,260°C 17
Thermal insulation
Ceramic Fibre Blanket
Flexible high-temperature insulation for furnace and kiln linings. Price on requestView
1,260°C 18
Thermal insulation
Ceramic Fibre Roll
Blanket supplied in rolls for large areas. Price on requestView
1,260°C 19
Thermal insulation
Ceramic Fibre Board
Rigid boards for backup and hot-face insulation. Price on requestView
700°C 20
Thermal insulation
Rockwool
Mineral wool for boilers, pipes, ducts and tanks. Price on requestView
700°C 21
Thermal insulation
Rockwool Rolls
Flexible rolls for roofs, walls and ducts. Price on requestView
22
Thermal insulation
Fibreglass Insulation
Light insulation for ducts, roofs and pipework. Price on requestView
23
Thermal insulation
Fibreglass Rolls
Rolled fibreglass for large surfaces. Price on requestView
400°C 24
Thermal insulation
Glass Wool
Lightweight wool for thermal and acoustic insulation. Price on requestView
2,000°C 25
Thermal insulation
Zirconia Insulation
Very high-temperature insulation for the hottest zones. Price on requestView
26
Acoustic insulation
Knauf Acoustic Insulation
Acoustic mineral wool from Knauf for walls, ceilings and ducts. Price on requestView
27
Acoustic insulation
Glass Mineral Wool
Absorbs sound and insulates, in rolls and slabs. Price on requestView
28
Acoustic insulation
Acoustic Insulation Rolls
Rolled acoustic wool for plant rooms and enclosures. Price on requestView
29
Gaskets and sealing
Superlite 5000 Red
Gasket sheet for general industrial flanges. Price on requestView
30
Gaskets and sealing
Superlite 5000 Steel
Steel-reinforced gasket sheet for higher pressure. Price on requestView
31
Gaskets and sealing
Superlite ITS Acid
Gasket sheet for acid and chemical duties. Price on requestView
32
Gaskets and sealing
Superlite Special Oil
Gasket sheet for oil and fuel duties. Price on requestView
33
Gaskets and sealing
Non-Metallic Gasket Sheets
Compressed sheet for flanges on steam, oil and water. Price on requestView
34
Gaskets and sealing
Steel-Reinforced Gasket Sheets
Reinforced sheet for higher pressures. Price on requestView
35
Industrial insulation
Thermal Insulation Materials
Insulation packages for plant and process equipment. Price on requestView
36
Industrial insulation
Furnace Insulation
Linings and backup insulation that cut fuel use. Price on requestView
37
Industrial insulation
Boiler Insulation
Keeps boiler surfaces safe and efficient. Price on requestView
38
Industrial insulation
Pipe Insulation
Sections and wraps for hot and cold pipework. Price on requestView
39
Industrial insulation
High-Temperature Insulation
For equipment running above normal insulation limits. Price on requestView
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Material guide
Which material, where.
A quick comparison of the main materials we supply. Temperatures are indicative maximums, not guarantees.
MaterialIndicative maxBest forWatch out for
Fire brick (fireclay)
1,450°C
General furnace, kiln and boiler linings
Less load and slag resistance than higher alumina
40% alumina brick
1,450°C
All-round lining where conditions are moderate
Not for the hottest or most aggressive zones
70% alumina brick
1,700°C
Hot, heavily loaded or abrasive zones
Costs more, so use it where the duty needs it
Zirconia
2,000°C
Glass contact and highly corrosive slags
Specialist material and the highest cost
Ceramic fibre
1,260°C
Fast heat-up, light linings, door seals
Not for abrasion or fast flame impact; wear PPE
Rockwool
700°C
Boilers, steam lines, ducts and tanks
Not for furnace hot faces
Glass wool
400°C
Ducts, roofs and sound absorption
Lowest temperature limit of the group
Indicative only. Exact limits depend on the grade, atmosphere and how the material is installed. Ask us for the data sheet.
Common problems
What is going wrong, and what to look at.
The lining wears out early
Check peak temperature, slag or alkali attack, abrasion and thermal shock.
High AluminaZirconiacastableCracks after heat-up
Check the heat-up schedule, expansion joints, and drying of castables.
MortarcastablefibrePipes and boilers run too hot
Check insulation thickness and its temperature rating on the hot side.
RockwoolPipe InsulationBoilerThe plant room is too loud
Check where sound escapes: walls, ceilings, ducts and enclosures.
AcousticKnaufGlass Mineral WoolFlanges weep or leak
Check the medium, pressure, temperature and gasket thickness and type.
SuperliteGasketSteel-Reinforced
Heat and sound, layer by layer
From 1,700° to a touch.
From 1,700° to a touch.
And quiet.
Furnace
1,700°
The hot face. Everything starts here.See the range
Refractory brick
1,200°
Takes the heat and the abrasion.See products
Insulating layer
700°
Slows the heat down.See products
Ceramic fibre
250°
Light, efficient, cuts fuel use.See products
Acoustic wool
110°
Soaks up the noise.See products
Steel shell
60°
Cool enough to work beside. Sealed at the joints.See products
HeatSoundTypical furnace wall, illustrative °C. Hover or tap a layer.
- Right gradeMatched to your temperature, atmosphere and wear.
- One full rangeRefractory to acoustic to sealing, from one supplier.
- Technical adviceSelection and installation guidance, in plain terms.
- Reliable supplyStock and delivery you can plan shutdowns around.
Product finder
What are you working on?
7 products for furnaces
A hot-face lining of brick or castable, backed by insulation to keep the shell cool.
Refractory materials
5 matches
See the range
5 products for kilns
Light, well-fitted linings give even heat and lower fuel use.
Refractory materials
4 matches
See the range
3 products for boilers
Refractory where the flame is, insulation outside, and sealing at doors and flanges.
5 products for steam lines
Insulate to save energy and protect people, and seal every flange.
3 products for glass plants
Linings that stand up to molten glass and constant heat.
Refractory materials
2 matches
See the range
4 products for generator rooms
Absorb noise and heat so the room is quieter and cooler.
Acoustic insulation
3 matches
See the range
How it works
From duty to delivery.
- Send the dutyTemperature, atmosphere, size
- We recommendThe right grade and thickness
- You get a quoteClear and quick
- We supplyDelivered to site
Should I use 40% or 70% alumina fire brick?
Higher alumina handles higher temperatures, load and abrasion. 40% suits general furnace and kiln linings. 70% and above is for hotter or more demanding zones.
Insulating brick or dense fire brick?
Dense fire brick takes wear and direct flame contact. Insulating brick is lighter and saves more heat, so it usually sits behind the hot face.
Ceramic fibre or rockwool?
Ceramic fibre takes far higher temperatures and heats up fast. Rockwool suits lower-temperature pipes, boilers and ducts, and costs less.
How do I choose a gasket sheet?
By pressure, temperature and the medium: steam, oil or acid. Steel-reinforced sheet suits higher pressure. Tell us the duty and we will match it.
Can one material cut heat loss and noise?
Often, yes. Mineral wool insulates and absorbs sound, so one layer can do both on pipes, ducts and plant-room walls.
What do you need for a quote?
The operating temperature, the atmosphere, what the lining touches, and the size of the job.
Guides and notes
Read before you buy.
Why furnace linings fail early: six common causes
Most early failures trace back to a short list of causes. Knowing them helps you fix the right thing.
Choosing a gasket sheet for steam, oil and acid
The medium, pressure, temperature and flange all matter. A short checklist before you order.
Ceramic fibre or rockwool: which insulation, where
Both insulate well, but they live in very different temperature ranges. Here is how to tell which belongs where.