Dowsil 791 – Weatherproof Low Mod Silicone 310ml

(2 customer reviews)

From: £8.88 inc. VAT
£7.40 ex. VAT

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  • Suitable For: the weather sealing of building components where high movement is anticipated.
  • Area of use: INT & EXT
  • Application Method: silicone gun
  • Volume: 310ml
  • Container Type: cartridge
  • Type: sealant
  • Colour: 10 colours
  • Brand: Dowsil
  • Manufactuer: Dowsil
  • Box Size: 1

 

Dowsil 791 or DC 791 is a low modulus, neutral cure, alkoxy, odourless silicone sealant. It is specifically designed for the weather sealing of building components where high movement is anticipated. Dowsil 791 adheres to a wide range of both porous and non-porous surfaces without the need for priming.

CHARACTERISTICS

– Excellent tooling and slow skinning properties. Therefore, it is ideal for large scale construction and glazing applications.
– Has excellent adhesion – adheres to most common surfaces. For instance, glass, metals, plastics and wood (painted or unpainted), uPVC and polycarbonate.
– Excellent external weathering properties, therefore, can be guaranteed over many years worth of exposure.
– High viscosity non-slump formula. In other words, it will hold it’s structure & body on even larger joints.
– Resistant to fumed Hydrogen Peroxide and fumed Formaldehyde.

 

For any other Dow Corning products on our website, please click here.

 

 

This item is currently experiencing a 4-5 week lead time

 

USES

– Perimeter pointing internally and externally around uPVC /wood and aluminium.
– Sealing and as an adhesive onto uPVC, plastic trims and components.
– Can be used for sealing soft metals. For instance, lead, copper and zinc.
– For weather sealing and joint sealing on pre-formed panels, Can also be used on curtain walls and glazing sealing.
– Glass to glass sealing and glass to aluminium sealing. Parapet and roof weather sealing applications.
– Suitable as an expansion joint sealant.
– Bedding and sealing of Insulated Glass units.

 

APPLICATION

PRIMER

Dow Corning 791 does not require a primer on most common surfaces, although adhesion tests are recommended before full-scale application. However, if the joint is likely to be immersed or if adhesion is poor (especially on porous surfaces) use a Dow Corning Primer.

SUBSTRATE PREPARATION

Ensure that the desired application area is dry and clean, containing no grease or other contaminants. For instance, remove dust with compressed air or de-grease by using a solvent soaked pad, following by wiping with a clean cloth.

LIMITATIONS

– Not to be used with bitumen asphalt, neoprene and certain organic elastomers, please refer to the datasheet.
– Can not be used in the manufacture of Aquariums.
– Non-overpaintable.
– Not recommended for use as a mirror adhesive.
– Do not use on food grade applications
– Do not use for in and around swimming pools. DC 791 is not suitable for swimming pool areas.
– Can yellow if exposed to bleach or HCl based brick cleaners while curing.

 

2 reviews for Dowsil 791 – Weatherproof Low Mod Silicone 310ml

  1. Barry S. (verified owner)

    Great quality neutral silicone

  2. Kristina Molloy (verified owner)

    Product was excellent,sales staff excellent

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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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