Everbuild 700T Silicone Sealant – LMN

Everbuild 700T is a low modulus, neutral oxime cure RTV silicone sealant designed for UPVC glazing, window sealing, and general construction joints. As a reliable everbuild silicone sealant option, the 700T bonds directly to a wide range of porous and non-porous substrates without the need for a primer coat first, which saves time and material cost on most standard jobs.

Low modulus means the cured sealant stays flexible under movement. Where frames expand and contract with temperature changes, or where substrates flex slightly, a low modulus silicone absorbs that movement without tearing away from the joint face. This makes the 700T particularly well suited to UPVC window and door installations, where frame movement is a fact of life and a rigid sealant would fail quickly.

The neutral cure chemistry is worth noting. Some silicones cure by releasing acetic acid, which gives off the familiar vinegar smell and can attack sensitive metals, mirror backings, and certain natural stones. The 700T uses a neutral oxime cure process, so there is no corrosive by-product released during curing. That makes it safe to use on copper, zinc, and other metals where an acetoxy product would cause staining or corrosion over time.

Where Everbuild 700T Silicone Sealant Gets Used

The 700T is a practical, everyday sealant for window installers, glaziers, and general builders. It handles the typical sealing jobs you encounter on a domestic or commercial site: bedding glass into frames, sealing around UPVC window and door perimeters, filling movement joints in cladding systems, and sealing around roof penetrations or flashings where flexibility is needed.

Because it adheres without priming to most common building materials including glass, UPVC, timber, brick, concrete, and aluminium, the 700T cuts out a preparation step that can slow down a working day. On a window installation with multiple frames to seal, that adds up.

Colour Options

The 700T is available in four standard colours: clear, white, brown, and black. Clear suits most glazing applications where a clean finish is preferred. White is the default for UPVC window sealing on standard white frames. Brown and black give you matching options for darker frame systems or where a contrasting sealant bead is specified.

At £2.69 per 310ml cartridge, the Everbuild 700T silicone sealant sits in the cost-effective end of the low modulus neutral cure market. It is the sort of product you buy in a box and keep on the van without worrying too much about the maths each time you pull out a cartridge. Bulk rates are available on request, so it is worth calling ahead if you are buying for a larger project or stocking up for a busy period.