Cromar AlphaChem Lead Seal

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£2.37 ex. VAT

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  • Suitable For: sealing roof systems, lead flashings, etc.
  • Area of use: EXT
  • Application Method: silicone gun
  • Time to full cure: 24 hours
  • Volume: 300ml
  • Container Type: cartridge
  • Type: sealant
  • Colour: grey
  • Brand: AlphaChem
  • Manufactuer: Cromar
  • Box Size: Single Box

 

Cromar AlphaChem Lead Seal is a specialised low modulus, neutral cure, fast-curing sealant tailored for use with metals like lead and galvanized steel.

 

Key Points:

Metal Compatibility: Specifically engineered for use with metals such as lead and galvanized steel, Lead Seal ensures reliable adhesion and sealing, making it an ideal choice for various metal applications.

Weather Protection: Lead Seal is designed to effectively prevent weather ingress, tile lift, and noise, this sealant provides robust protection against the elements, enhancing the durability and longevity of metal structures and roofing systems.

Versatile Application: From rooflights and conservatories to soffits, glass houses, and industrial roofing systems, it offers versatile sealing solutions for a wide range of construction projects, providing a flexible alternative to traditional lead flashing mortaring.

Storage and Shelf Life: Store in cool, dry conditions between +5°C and +25°C to maintain its quality. With a shelf life of 24 months when stored in its original, unopened packaging and under proper storage conditions, it ensures long-term reliability for your sealing needs.

 

 

 

For more information on our range of sealants, please click here. Alternatively, for our full range from Cromar, click here.

For more information on Cromar, you can visit their website here.

 

 

Cromar AlphaChem Lead Seal is an ideal solution for sealing various structures, including rooflights, conservatories, soffits, glasshouses, industrial roofing systems, and lead flashing. It serves as a versatile alternative to traditional lead flashing mortaring. With outstanding UV, heat, and ozone resistance, this sealant forms a durable, resilient rubber upon setting. It boasts excellent adhesion to a wide range of materials, including glass, slate, metals, concrete, brick, GRP, sealed timber, plastics, acrylics, PVCu, and painted surfaces.

 

APPLICATION

  • Ensure surface cleanliness: Clean, sound, dry surfaces free from dust, grease, or other contaminants are essential for proper adhesion.
  • Fill gaps or voids: Utilize Alpha Chem Expanding Foam or appropriate backing tape/rod to fill any gaps or voids effectively.
  • Nozzle preparation: Cut the nozzle thread to the desired size for application.
  • Sealant application: Use a sealant gun to apply the sealant, then tool it down with a spatula dampened with soapy water within 5 minutes of application.
  • Bonding procedure: For bonding, press the two surfaces together before skinning occurs; note that skinning time may reduce on very hot roofs.
  • Tool cleaning: Clean tools with Graffers Wipes; mechanically remove cured sealant if necessary.
  • Packaging disposal: Dispose of all packaging responsibly; it is the user’s responsibility to ensure correct disposal.

LIMITATIONS

  • Incompatible substrates: Avoid using on PE, PP, PC, PMMA, PTFE, and soft plastics, as well as neoprene and bituminous substrates.
  • Unsuitable for natural stone: Not recommended for use on natural stone surfaces.
  • Avoid in aquarium applications: Do not use in aquarium construction due to unsuitability.

 

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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
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