Weatherproofing Sealant ( Sillicon ) – DOWSIL™ 791, 310ml

£16.25 incl. VAT

DOWSIL™ 791 Weatherproofing Silicone Sealant is a one-part, low modulus, neutral curing weatherproofing silicone sealant designed for both commercial and domestic applications. It provides excellent unprimed adhesion to most porous and non-porous surfaces.

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SPECIFICATIONS

Benefits

  • Excellent weathering characteristics, including resistance to ozone, UV radiation, and temperature extremes
  • Joint movement capability +/- 50%
  • Conforms to ISO 11600-F&G-25LM and also meets ISO specification 9047 class 50%
  • Designed for general glazing, and weather sealing in curtain walls & building facades

Substrate Type

  • Wood
  • Glass
  • Toughened Glass
  • Laminate Glass
  • Glass Sealed Units – Weatherseal
  • Brick
  • Stone
  • Concrete
  • PVCu
  • Plastic
  • Mill Finished Aluminium
  • Anodised Aluminium
  • PVF2 Aluminium
  • Powdercoat
  • Steel
  • Stainless Steel
  • Galvanised Steel
  • Copper
  • Brass
  • Zinc
  • Lead
  • Polycarbonate
  • Masonry
  • MDF
  • Stained Timber
  • Painted Timber

Technical Information

Where to use Exterior
Paintable No
Time to cure 24 hours
Container Type Cartridge
Shelf life 1 year
Sizes 310ml
Application method Sealant Gun and Cartridge

 

Supporting Documents Data Sheet

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SHIPPING

Free Delivery:

  • Available on all orders over £400 within the London (M25) area.

Delivery Times:

  • Standard Flat & Pitched Skylights: 3–6 working days.
  • Custom Sizes: 3–6 weeks for production and shipping (free delivery).
  • Roof Lanterns, Framed Skylights, Electric Opening Skylights, Walk-On Skylights, Skylight Blinds: 10–14 working days.
  • Glass Balustrades & Juliet Balconies: 4-8 weeks (after approval of detailed drawing)

Delivery Arrangements:

  • Delivery is scheduled Monday to Friday, 8 am to 5 pm.
  • We’ll contact you to arrange a delivery time once payment is complete.

Shipping Options:

  • Enter your shipping address at checkout to view options.
  • Within M25: Our drivers ensure safe delivery. We ask that you or your builders are present to accept the order.
  • Outside M25: We use external couriers. They will contact you to schedule delivery.
  • Extra Economy Shipping: Available for all areas except Northern Ireland and Scotland. In rare cases, you may need to pick up your order from a nearby depot.

Important Notes:

  • Products range from 10kg to 280kg. You may need 2–6 people to assist with unloading.
  • We are not liable for any damage during unloading, as it’s the customer’s responsibility.
  • If no one is available to receive the delivery, we will try to contact you. If unreachable, the order will be returned to our warehouse.