Dowsil 791 – Weatherproof Low Mod Silicone
From: £8.58 inc. VAT
£7.15 ex. VAT
- Suitable For: the weather sealing of building components where high movement is anticipated.
- Area of use: INT & EXT
- Application Method: silicone gun
- Volume: 310ml / 600ml
- Container Type: cartridge / foil
- 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.
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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.
3 reviews for Dowsil 791 – Weatherproof Low Mod Silicone
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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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Barry S. (verified owner) –
Great quality neutral silicone
Kristina Molloy (verified owner) –
Product was excellent,sales staff excellent
Martin B. (verified owner) –
Quality gear from a quality company