Silicone is used to seal joints between two surfaces. It can be used indoors or outdoors, between almost any surfaces. It’s pretty useful stuff to have around the home. But there is more than one kind, and a few things you need to know to help you get the best out if it.
To choose the right sealant for the job, first take a close look at the problem you’re trying to fix – where is the gap, how big is it, what weather conditions will it face, do I want to paint over it? For first time users the range of sealants on the market can be quite daunting. At Mitre 10, however, you’ll find experts on hand to give you the right advice on which sealant to use.
Window & Glass Sealant
Uses: Windows, doors, aquariums, light fittings, awnings, refrigerator gaskets, exhaust fans.
Features: Adheres strongly to glass, is flexible and non-staining.
Bathroom & Tile Sealant
Uses: Virtually all surfaces found in bathrooms, laundries, toilets and kitchens.
Features: Built-in mould and mildew inhibitor, excellent adhesion to most hard surfaces.
Roof & Gutter Sealant
Uses: Guttering, downpipes, aluminium and galvanised iron roofing, sheet metal and garage doors.
Features: Doesn’t corrode metal surfaces or cause rusting. Ideal for most roofing, guttering and wall systems.
Brick & Concrete Sealant
Uses: Concrete, mortar, stone, fibro, marble, granite, slate and plasterboard.
Features: Permanent, flexible, waterproof seal, long working time for difficult applications, won’t eat away at surrounding materials.
Paintable Sealants
Uses: Window frames, door frames, timber, masonry.
Features: Most clean up in water, ideal for all house frames which require painting. Sometimes used between pavers to prevent weeds growing through.
It sounds like the magnetron is burned up. It will probably be cheaper to replace the microwave. If it's new, then take advantage of the factory warranty or take it back to the dealer you bought it from.