- Suitable For: perimeter sealing of PVCu frames and sealing joints in brickwork
- Area of use: INT & EXT
- Application Method: silicone gun
- Time to full cure: 24 hours
- Volume: 380ml
- Container Type: cartridge
- Type: sealant
- Colour: 11 colours
- Brand: ARBO
- Manufactuer: ARBO
- Box Size: 1
Data Sheets
Arbosil LMS Neutral Cure Silicone Sealant
Arbosil LMS is a high-quality, one-part neutral cure silicone sealant that reacts with moisture in the air to form a durable, flexible rubber seal. It’s designed for long-lasting performance and excellent adhesion on a wide range of construction materials.
Key Applications:
Perimeter sealing of PVC-U and PPC window and door frames
Movement joints in brickwork
Glazing of insulating glass units
Remedial glazing in building maintenance
Note: Not suitable for overpainting, glass-to-glass butt joints, or use against natural stone.
Application Instructions:
Before applying Arbosil LMS, all surfaces must be clean, dry, and free from dust or grease. For best results:
Degrease using ARBO® Cleaner
Use ARBO Primer 2650 on porous surfaces like brickwork
Joint backing should be a closed cell, cross-linked polyethylene foam where required
All work should follow BS8000-16:1997 + A1:2010 standards for joint sealing in buildings
Whether you’re working on new installations or repairs, Arbosil LMS offers reliable sealing performance with excellent elasticity and adhesion.
For more information on Arbo, please visit their website here.
For more in our range of external sealants, please click here. For application guns to use with this product, please click here.
Arbosil LM is recommended for perimeter sealing of PVCu frames and sealing joints in brickwork, the MVP and Heel Bead methods of glazing insulating glass units, remedial glazing, and sealing joints in translucent roofing sheets. NB: It is not recommended for overpainting, glass wall assemblies and uses against natural stone.
APPLICATION
Joint Preparation
The joint surfaces must be clean, dry and free from all contamination. The surfaces should be degreased using the appropriate Arbo Cleaner. Primers may be required on some substrates. It is recommended that Adshead Ratcliffe Technical Services Department should be consulted and advice obtained with regard to the choice of primer for specific purposes.
Joint Backing
Where applicable, appropriate joint filler, e.g. closed-cell polyethylene foam, should be used to provide the correct joint depth. All joint preparation, priming, and sealant application should be carried out in accordance with BS 8000 Part 16, the British Standard for the sealing of joints in buildings using sealants.
Application
Arbosil LM is supplied in polyethylene 310 and 380ml cartridges and can be applied into the joint using an Arbo Caulking Gun
JOINT SIZE SUITABILITY
Joint Width
Minimum 6mm Maximum 25mm (single application);
50mm (multiple applications)
Joint Depth Minimum
10mm on porous substrates
Minimum 6mm on non-porous substrates
Maximum 15mm
Width: Depth ratio
(within above min/max restrictions)
2:1 butt joints
1:1 lap joints
15 reviews for ARBO Arbosil LM External Sealant 380ml
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| Elementlength | |||||||
| up to 1,5 m | up to 2,5 m | up to 3,5 m | up to 4,5 m | up to 2,5 m | up to 3,5 m | up to 4,5 m | |
| Type of window frame material |
Minimum witdth of joints for a butled mounting b in mm | Minimum witdth of joints for a inner mounting b in mm | |||||
| Hard PVC (white) | 10 | 15 | 20 | 25 | 10 | 10 | 15 |
| Hard PVC and PMMA (dark) (colour extruded) | 15 | 20 | 25 | 30 | 10 | 15 | 20 |
| Hard PUR integral foam | 10 | 10 | 15 | 20 | 10 | 10 | 15 |
| Wood-aluminium-window | 10 | 10 | 15 | 20 | 10 | 10 | 15 |
| Aluminium-plastic sandwich frame (bright) | 10 | 10 | 15 | 20 | 10 | 10 | 15 |
| Aluminium-plastic sandwich frame (dark) | 10 | 15 | 20 | 25 | 10 | 10 | 15 |
| Wooden window frame | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
From: £3.11 inc. VAT
£2.59 ex. VAT
From: £4.09 inc. VAT
£3.41 ex. VAT
£2.87£2.26 inc. VAT£2.39£1.88 ex. VATBond It MM50 is a mid mod, acetoxy cure, sanitary grade silicone sealant containing a powerful anti‐fungal compound to resist mould growth. A one part silicone sealant specifically designed for areas which are prone to high humidity or frequent wetting. For sealing around worktops, basins, sinks, bed basins to vanity units and also to seal shower trays and shower units. Features & Benefits: - Permanently Flexible - Mould Resistant - Contains powerful fungicide - Waterproof - For Internal Use - High Viscosity Formula - Tools Quickly For seal£2.87£2.26 inc. VAT£2.39£1.88 ex. VATBond It MM50 is a mid mod, acetoxy cure, sanitary grade silicone sealant containing a powerful anti‐fungal compound to resist mould growth. A one part silicone sealant specifically designed for areas which are prone to high humidity or frequent wetting. For sealing around worktops, basins, sinks, bed basins to vanity units and also to seal shower trays and shower units. Features & Benefits: - Permanently Flexible - Mould Resistant - Contains powerful fungicide - Waterproof - For Internal Use - High Viscosity Formula - Tools Quickly For seal£23.04£18.11 inc. VAT£19.20£15.09 ex. VATBond It Trowel Mastic can be applied to most common roofing surfaces including mastic asphalt, roofing felt, corrugated iron, cast iron, fibre/cement, slates, lead, copper, zinc, concrete and timber. Fibre reinforced making it ideal for filling cracks and holes and cures to give a strong and flexible compound. Storage LifeMinimum of 5 years from date of manufacture under good storage conditions in original unopened containers. Store under cover away from sources of heat and ignition. Keep containers sealed when not in use. For all other Bond-it
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£2.89 ex. VATBond-It De-Bond Mate is A non-drip gel formula for the complete removal of cured silicone sealant, particularly when silicone has been accidentally smeared over glass, ceramics or countertops. Removes all types of silicone sealant, leaving surfaces ready for re-sealing. For all other Bond-it products on our website, please click here.For any further information, you may need on Bond-it, please visit their website here.
















Remo Melillo (verified owner) –
I ended up messing my order up on line so ended up calling and very glad I did, spoke to a very helpful guy and gave me some good advice, which I took and turned out for the best so thank you very much. The product is incredibly good and has solved my problem.
Cannot recommend strongly enough so will carry on shopping here.
Keith (verified owner) –
Very prompt turnaround of order from stock. Hassle free process
Christopher GODDARD (verified owner) –
First class service
Mark N. (verified owner) –
Julia . (verified owner) –
Gary Reeves (verified owner) –
Great material
Julia . (verified owner) –
Always happy with the service these guys are providing couldn’t recommend them enough! Great products
Julia (verified owner) –
Same
Good
⭐️⭐️⭐️⭐️⭐️
Jimmy Harris (verified owner) –
5 ⭐️ Service
Chris (verified owner) –
Excellent service and fast response.
Verified Buyer (verified owner) –
Great service
Alan Fuller (verified owner) –
Exceptional product used before. Fast efficient service.
Deborah (verified owner) –
Perfect to seal the new trim on our windswept windows
Dave N. (verified owner) –
A great all round sealant for brick and stone , easy to apply and finish . Used this sealant for years and by far my favourite to use !
Stephen Dixon (verified owner) –
Rapid delivery. Product is good but there were no nozzles sent with the tubes