FREE DELIVERY OVER £50
CLICK & COLLECT
Screwfix Gift Cards a perfect gift
SERVICE UPDATES

As an essential retailer, our stores remain open across the UK

Dow 791 Weatherproofing Silicone Sealant Black 310ml (62431)

£ 6.29INC VAT

Add to basket for...

Check stock in your local store

Dow 791 Weatherproofing Silicone Sealant Black 310ml (62431)

Low modulus silicone that gives excellent, unprimed adhesion to both porous and non-porous substrates. Suitable for weather sealing and expansion joints.

  • For Fixing, Sealing & Binding
  • Mould & Mildew-Resistant
  • Low Odour & Solvented
  • No Primer Required
  • Apply in Dry Conditions Only

More Info

View all: Dow Weatherproof Sealants

£6.29INC VAT (£20.29/Ltr)

Add to basket for...

Check stock in your local store

Dow 791 Weatherproofing Silicone Sealant Black 310ml is rated 4.8 out of 5 by 39.
  • y_2021, m_1, d_21, h_17
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.13
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_39
  • loc_en_GB, sid_62431, prod, sort_[SortEntry(order=FEATURED, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_screwfix
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getAggregateRating, 17ms
  • REVIEWS, PRODUCT

Add to saved list...

Save
Rated 5 out of 5 by from Excellent product Used this product for sealing water ingress on black facia boards causing a leak under a flat roof. Use gloves when using as difficult to get off your hands!
Date published: 2021-01-14
Rated 4 out of 5 by from Weatherproofing Silicone Seala Seems expensive but you won't need to do the job more than once.
Date published: 2020-12-13
Rated 4 out of 5 by from Good stuff Quality product that is easy to apply but can be messy to handle.
Date published: 2020-08-29
Rated 5 out of 5 by from Seals the Butt Used on water butt for the tap, Stopped the leaks Great!
Date published: 2020-06-18
  • y_2021, m_1, d_21, h_17
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.13
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_39
  • loc_en_GB, sid_62431, prod, sort_[SortEntry(order=FEATURED, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_screwfix
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getReviews, 30ms
  • REVIEWS, PRODUCT

Usage for chimney cowl to cap gap?

Can this be used this to seal around a chimney cowl to the chimney cap? I understand it has a 150 degC rating which should be more than sufficient for the two storey gas flue.
Asked by: Jayb5

Can this be used on fish ponds?

Asked by: 44APB44
Hello, No, this is not marine safe and may harm aquatic life. Additionally, it's not suited for permanent submersion in water. I would recommend opting for a specific pond safe product. Thanks for using Q&A. [DG]
Answered by: DGIFF
Date published: 2020-09-30

Paintable?

Is it paintable? I assume not. Thanks
Asked by: Undaunted

does this have a matt black finish

Asked by: axxpo

Splashback

Hi, just wanted to check if this low modulus sealant would be ideal for attaching a splashback in the kitchen. Thanks in advance.
Asked by: Valera
  • y_2021, m_1, d_21, h_17CST
  • bvseo_bulk, prod_bvqa, vn_bulk_3.0.13
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_21
  • loc_en_GB, sid_62431, prod, sort_[SortEntry(order=LOCALE, direction=DESCENDING), SortEntry(order=FEATURED, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_screwfix
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getReviews, 25ms
  • QUESTIONS, PRODUCT
  • bvseo-msg: BV SEO Content for this product did not include verbose reviews.;
Specification
Brand Dow
CE Standard (Tested to EN...) ISO 11600-25LM, ISO specification 9047 Class 50%.
Colour Black
Label Info 2: Hazard Statements EUH 210 Safety data sheet available on request.EUH 208 Contains. May produce an allergic reaction.
Label Info 3: Precautionary Statements P271 Use only outdoors or in a well-ventilated area.
Label Info 5: Hazardous Chemical Content Contains: Methyltrimethoxysilane. This product contains dodecamethylcyclohexasiloxane (D6)
Manufacturer Guarantee 1 Year Guarantee
Model Name 791
Pack Size 1
Parent Colour Black
Pieces in Pack/Case 1
Product Type Weatherproofing Silicone Sealant
Sealant/Adhesive Container Type Cartridge
Suitable Application For Fixing, Sealing & Binding
Volume 310 ml

Downloads

Safety Data Sheet (COSHH)