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Dow Corning

Dow Corning 791 Weatherproofing Silicone Sealant Black 310ml

Product Code: 62431

Rated 5 out of 5 by 4 reviewers.

310ml. Low modulus silicone that gives excellent, unprimed adhesion to both porous and non-porous substrates. Suitable for weather sealing and expansion joints. ISO 11600-25LM. Meets ISI specification 9047 Class 50%.

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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
Rated 5 out of 5 by Best ever sealant Dow cornering 791 black is the best so far on the market. I own a morris minor classic car that had a leaking windscreen rubber and no other sealant would seal it. Now no more puddles inside the car. 6 Aug 2011
Rated 5 out of 5 by Dow Corning 791 We used this after being impressed when our builders used it. Put in very large pieces of glass. The seal is fantastic, does what it says on the packet exactly. We will use more of this product. Good outside and in the house. allows a little movement in the glass; what we needed here. Waterproof and allows for expansion and contraction on wooden soffits also. An excellent bond. Better value than other DIY products we have tried from big stores. We look forward to using this in other parts of our build to gain a good seal.. watch this space. Do not mistake this for glue though. reccomend it on all counts. also quick delivery. 8 Nov 2009
Rated 5 out of 5 by Rolls Royce of silicons Have used 100s of tubes on conservation project on north Cornwall coast. Excellent adhesion to stone and metal and wholly weather reliable product. Screwfix offering great price as normal but need to offer more colours - dark grey would have helped me. 9 Jun 2009
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Specification

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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