Description
The LTX 90mm polystyrene fixing plug 200pcs box is the Klimas LTX-10 length for a 50 mm insulation board on a new or stripped wall of brick, block or concrete. Over a wall that keeps its old plaster, the same plug holds a 30 mm board. It is hammered in: a plastic sleeve, a plastic pin and a 60 mm plate pressing on the board face.
With thin boards, a few millimetres of plaster use up most of the spare length, so check the wall before you buy. The sections below show what this box reaches and when a longer one is the safer order; every length sits in the insulation fixing accessories range.
Which Boards the 90 mm Plug Holds
A plug must pass through the board, the adhesive and any plaster, and still finish with its full anchorage in sound wall. The Klimas selection table puts the 90 mm length here on brick, block and concrete:
| Wall | Plate on the board face | Plate recessed |
|---|---|---|
| New or stripped wall, 10 mm adhesive bed | up to 50 mm | up to 70 mm |
| Old plaster of 20 mm plus the adhesive bed | up to 30 mm | up to 50 mm |
The 2026 European Technical Assessment gives the same figures by subtraction: plug length, minus adhesive and plaster, minus 30 mm of anchorage. 90 − 10 − 30 leaves 50 mm of board on a new wall; 90 − 30 − 30 leaves 30 mm over old plaster.
In aerated concrete blocks the plug has to sit 50 mm deep instead of 30 mm, so every figure drops by 20 mm. On a new wall that means a 30 mm board on the surface or 50 mm recessed; over old plaster, 10 mm on the surface or 30 mm recessed. For a thicker board on aerated block, choose a longer plug.
Why the LTX-10 Suits Thin Boards
- Matched to 50 mm on new masonry. A 50 mm board on a fresh or stripped wall is this length's own row in the table, with the plate on the surface.
- Reaches 70 mm when recessed. Sinking the plate into the board adds 20 mm of reach, so the same box covers a 70 mm board on a new wall.
- Plastic all the way through. Sleeve and pin carry no steel, and Klimas declares 0.001 W/K per plug on the surface and 0.000 W/K recessed.
- One bit for every wall type. Concrete, solid and perforated brick, lightweight block and aerated concrete all take the same 10 mm drill under ETA-16/0509.
LTX-10090 Specification
| Parameter | Value |
|---|---|
| Product code | LTX-10090 |
| Sleeve diameter × length | 10 × 90 mm |
| Plate diameter | 60 mm |
| Drill bit | 10 mm (cutting diameter up to 10.45 mm) |
| Anchorage depth in the wall | at least 30 mm; 50 mm in aerated concrete |
| Drilled hole depth | at least 40 mm; 60 mm in aerated concrete |
| Sleeve material | Polyethylene |
| Pin material | Polyamide, glass-fibre reinforced |
| Point thermal transmittance | 0.001 W/K on the surface · 0.000 W/K recessed |
| Plate stiffness | 0.50 kN/mm |
| Minimum spacing, edge distance and wall thickness | 100 mm each |
| European Technical Assessment | ETA-16/0509 of 30 March 2026 |
| Box | 200 plugs |
Pull-Out Resistance in Each Wall Type
| Wall | Drilling | Characteristic pull-out |
|---|---|---|
| Concrete C12/15 | hammer | 0.50 kN |
| Concrete C20/25 to C50/60 | hammer | 0.75 kN |
| Solid clay brick | hammer | 0.75 kN |
| Calcium silicate solid brick | hammer | 0.60 kN |
| Calcium silicate hollow block | hammer | 0.60 kN |
| Vertically perforated clay brick | rotary only | 0.60 kN |
| Porotherm 25 perforated block | rotary only | 0.40 kN |
| Lightweight concrete block | rotary only | 0.60 kN |
| Aerated concrete, density from 0.35 kg/dm³ | rotary only | 0.50 kN |
| Aerated concrete, density from 0.65 kg/dm³ | rotary only | 0.60 kN |
The Klimas data sheet starts the 0.75 kN concrete row at C20/25, while the 2026 assessment starts it at C16/20. On concrete of uncertain grade, work with 0.50 kN. All values are characteristic: the fixing design applies its own safety factors and sets the number of plugs per square metre.
Fitting the 90 mm Plug
- Bond the boards with adhesive first. The plug resists wind suction; it does not carry the weight of the insulation.
- Pick a spot with adhesive behind the board and drill 10 mm, at least 40 mm into sound wall, or 60 mm into aerated concrete. Old plaster is not part of that depth.
- Use rotary drilling only in perforated brick, hollow block and aerated concrete, so the thin inner walls do not break.
- Clear the dust with four slow in-and-out passes of the drill.
- Set the plate flush with the board and drive the pin home in one go; a pin that is already set is not hit again.
Work between 0 °C and +40 °C, keep plugs 100 mm apart and 100 mm from edges, and get mesh and base coat over the plates within six weeks, as sunlight is only allowed on an uncovered plug for that long. The guide to installing insulation fixings sets out the order of work for a whole elevation.
Recessed Fixing on Thin Boards
Klimas's WK-FT cutter sinks the plate into the board, the pin is driven, and a polystyrene disc closes the hole. On a 50 mm board that leaves little polystyrene in front of the plate, so recessing is mainly the way to stretch this length to a 70 mm board on a new wall.
All LTX Lengths Side by Side
The Klimas selection table for every length Renders World stocks, for brick, block and concrete. "New wall" counts 10 mm of adhesive; "old plaster" counts 10 mm of adhesive plus 20 mm of plaster.
| Plug | New wall, surface | New wall, recessed | Old plaster, surface | Old plaster, recessed |
|---|---|---|---|---|
| 70 mm | 30 mm | 50 mm | 10 mm | 30 mm |
| 90 mm (this box) | 50 mm | 70 mm | 30 mm | 50 mm |
| 110 mm | 70 mm | 90 mm | 50 mm | 70 mm |
| 120 mm | 80 mm | 100 mm | 60 mm | 80 mm |
| 140 mm | 100 mm | 120 mm | 80 mm | 100 mm |
| 160 mm | 120 mm | 140 mm | 100 mm | 120 mm |
| 180 mm | 140 mm | 160 mm | 120 mm | 140 mm |
| 200 mm | 160 mm | 180 mm | 140 mm | 160 mm |
| 220 mm (100 per box) | 180 mm | 200 mm | 160 mm | 180 mm |
Where the old plaster is thicker than 20 mm, add the extra to the board thickness before you read across. The plug length calculator does the same sum for any other build-up.
Is 90 mm Right for Your Wall?
- Yes for 50 mm EPS insulation boards on the surface of a new or stripped wall, or for a 30 mm board over about 20 mm of old plaster.
- Take the 110 mm plug for a 50 mm board over old plaster, or a 70 mm board on a new wall with the plate on the surface.
- Take the 70 mm plug only for a 30 mm board on a new wall.
LTX 90 mm Plug — Questions Before You Order
Will the 90 mm plug hold a 70 mm board?
Only recessed, and only on a new or stripped wall. With the plate on the surface a 70 mm board needs the 110 mm plug, and over old plaster the 90 mm length stops at 50 mm even when recessed.
How many boxes does a wall need?
Klimas recommends at least 6 plugs per m² across the middle of a wall and 8 per m² near corners, for walls up to 15 m high. A box of 200 therefore covers about 33 m² or 25 m², so a 60 m² wall at 6 per m² takes 360 plugs, or two boxes.
Above 15 m the recommended minimum rises to 8 per m² in the middle and 10 per m² near corners. The insulation design for the building gives the final count.
Can I use it on aerated concrete blocks?
Yes, with rotary drilling and 50 mm of anchorage, which limits it to a 30 mm board on the surface of a new wall or 50 mm recessed. Pull-out is 0.50 kN in blocks from 0.35 kg/dm³ and 0.60 kN from 0.65 kg/dm³.
Which walls does the assessment cover?
Concrete, solid clay and calcium silicate brick, calcium silicate hollow block, vertically perforated clay brick, Porotherm 25, lightweight concrete block and aerated concrete. Other wall types need site pull-out tests before the plug is used.
Which insulation is it made for?
Klimas recommends the LTX-10 for EPS and XPS polystyrene boards. Stone wool slabs are fixed with the plug named in the wool system's own instructions.
Do the plugs hold the boards up?
No. The adhesive carries the boards; the plugs are an extra fixing against wind suction, which is the only load the assessment covers.