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Dow Corning

Dow Corning 791 Weatherproofing Silicone Sealant Black 310ml

Product Code: 62431

310ml. Low modulus silicone that gives excellent, unprimed adhesion to both porous and non-porous substrates. Suitable for weather sealing and expansion joints.

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ISO 11600-25LM, ISO specification 9047 class 50%.

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Safety Data Sheet (COSHH)




QtyPrice per item
1 - 2 £6.29 (£20.29/Ltr)
3 - 5 £5.65 (£18.23/Ltr)
6 + £4.99 (£16.10/Ltr)

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Rated 5 out of 5 by Excellent sealer Great product , did exactly what I needed it to after another product had let me down !! Was a lot thicker than most silicone which was exactly what I needed !! 29 Apr 2015
Rated 4 out of 5 by Good roof sealant Good stuff for sealing those very annoying corners on roof windows where the manufactures flashing is not up to the job. Also good for sealing gutter joints when using different manufactures products that don't quite fit as they should. A bit pricy for what it is though. 18 Dec 2014
Rated 5 out of 5 by silicon you always get value for money from screwfix. This silicon is excellent and not watery like some you buy. Highly recommended 11 Nov 2014
Rated 5 out of 5 by Dow Corning 791 After trying to find a silicone that would stick to perspex (clear polystyrene sheet). This is the only one that worked for me. Other neutral low modulus silicones may work to. I would stay away from silicones that contain acetoxy when trying to stick to oily plastics. Only give 4star rating for reliability because it hasnt been on for long so I dont no how long it will last. 13 Jun 2014
  • 2015-11-25 T09:43:27.350-06:00
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Brand Dow Corning
Colour Black
Manufacturing Standards ISO 11600-25LM and ISO specification 9047 class 50%
Model Name 791
Pack Size 1
Product Type Weatherproofing Silicone Sealant
Sealant Adhesive Volume 310 ml
Total Product Weight 0.506 kg