If you need some new mastic sealant for your built-in hob top then look no further than eSpares. This may be just the part you're after. I had my gas hob fitted today. The plumber was in a hurry and didn't get it square with the worktop and the foam was all over the place. Nice soldered joints though. All gas hobs should come with detailed instructions about where they can be fitted and the safe distances that units, plugs and anything else, must be from the fitted hob. Read and follow these as they will be up to date and specific to your appliance. That said there are some general rules that you should follow: Ventilation

Sealing hob to worktop | Screwfix Community Forum

The sealer is designed to repel oil and water, which can lead to extensive damage in the grout over time. In places where moisture is common, such as the kitchen or bathroom, this type of protection can reduce the amount of maintenance your grout and tiles will need after extensive use. The sealer helps repel food, grease, and mildew, as well as mold to prevent ugly stains and damage from developing. Like most grout sealers, this one is available in several container sizes, including spray bottles. You can fit a gas hob yourself, and it is a very satisfying job, if you take the time to do it right. You are not allowed to connect the hob to the gas unless you are Gas Safe registered, and it is worth engaging with your chosen engineer before you start so that you are familiar all the rules.

Tube grout sealers allow for precise control over the sealant as you work without need of a brush or rag. But since tubes usually don't contain a whole lot of product, they are best used for small projects or for touching up damaged spots. If you have grout, it's smart to keep a tube of sealant, like the Miracle Sealants Grout Sealer, on hand for spot repairs when needed. This helps to keep the grout intact over time. There are some simple guidelines to follow when it comes to where you shouldn’t place your gas hob:

5 Metre Sealing Foam Strip for Cooker Hobs or Kitchen Sinks

I just fitted a ceramic hob into a new worktop, and the only sealing supplied was a very narrow adhesive foam strip. It is far smaller than the recess on the underside of the edge of the hob. Wipe excess sealer off the tiles, unless you are using a product meant to seal both grout and tile. Formulated for both interior and exterior use, you can also use this sealer to protect outdoor tiled surfaces on patios or around swimming pools.

The reason/reasons silicon should not used to set down ceramic hobs is because of the possible heat generated A very common size is 600mm wide by 500mm deep. The size of the hole you will need to cut into your worktop will be smaller than the overall hob size. Having said that, I cooked a three-pan meal on the hob last night and throughout the chassis was cold and the stainless cover only got warm (the oven is not in yet). At least on this hob there's very little coupling between the top cover and chassis/flange and plenty of air movement. I was curious how hot my silicone would get. Not very hot it seems. Worktops are stone which would help keep things cool. A gas hob is cut into a worktop and sits over a kitchen base unit like the one in the image above. Before it is cut you need to measure the hob itself, or use the manufacturers fitting instructions and/or template to make sure you know the exact opening size to cut. Of course, you can also use this easy-to-apply, fast-drying grout sealer spray on existing grout. It won't change the appearance or leave haze on the surrounding tile, whether that's natural stone, ceramic or porcelain tile, or masonry. As a bonus, the product sprays on without much over-spray and requires very little cleanup.

sealing ceramic hob? | Screwfix Community Forum sealing ceramic hob? | Screwfix Community Forum

The clips are fitted to the underside of the hob and tightened onto the worktop to hold the hob firm. The hob should also sit on some sealing strips to keep the joint between the underside of the hob and the top of the worktop, clean and waterproof. Let the sealer dry for the time recommended by the manufacturer. This is typically anywhere from 15 minutes to an hour. Choose your appropriate application tools. If applying the sealer to a large tiled floor, and using a product safe for use on tile as well as grout, it’s fastest to apply the sealer with a sponge mop. But for most jobs, you’ll do best with a small paint brush, sponge, or roller. Some products come in applicator bottles with a roller top built right in; this is especially handy for thin grout lines. Aerosol products spray on directly. Most retailers are careful to provide lots of information so that you get the right size hob for the space you have in your kitchen. Fitting a Gas Hob Yourself This is just a guess, I would think the reason they say do not use a sealant, just in case anything goes wrong with the hob and it needs to be taken out.

Officially Gas Safe Register disapprove of silicone because the hob can not then be easily removed for maintenance. It must also be fixed using the manufacturer's clamps.

GAS HOB SEALING | DIYnot Forums GAS HOB SEALING | DIYnot Forums

Your hob is one of the most functional parts of your kitchen design, but that doesn’t mean it can’t look great too! Explore our comprehensive collection right here and choose the ideal kitchen hob to suit your taste and requirements. Not so obviously, you will almost certainly need to have an electricity supply for your gas appliance. This also should be within 1.5m of your planned location. Not all types of grout need to be sealed. Synthetic-based grouts, such as epoxy or urethane grouts, do not require regular sealing. However, if you want to keep your cement-based grout—the most common type—reasonably free of dirt, stains, and mold spots, you’ll need to apply a grout sealer on a regular basis. If the sealer leaves any hazy or white splotches on the tile, dampen a clean cloth with a bit of the grout sealer, and wipe the area until the blotch is gone. Now wipe the tile with a clean, dry cloth to remove any lingering residue.

Essentially this is all common sense; you want it away from any draughts that might blow out the flame leaving gas flowing into your kitchen. Apply enough grout sealer to soak the grout. Work slowly and methodically to ensure you evenly coat all grout surfaces. Any gas hob needs to be fitted into a room with adequate ventilation, just in case there is a gas leak – a very unlikely event but potentially catastrophic. If there is not a door or window to the outside in the kitchen a gas hob should not be used.