When DOWSIL 795 Structural Glazing Sealant is used in structural applications, the structural joint design MUST be reviewed by a technical service specialist.  Complete design and installation guidelines are contained in the Asia Technical Manual, and must be followed for warranty applications when using this product. 

Joint Design - Structural joints sealed with DOWSIL 795 Structural Glazing Sealant should have a minimum depth (or bite) of 6 mm. For large site- glazed joints the sealant or bite should not be more than 12 mm when the sealant can cure from one side only. When an open-cell moisture-permeable spacer tape is used, a structural bite up to 24 mm can cure to optimum strength. The exact structural bite should always be calculated. The thickness of the structural sealant joint or glue line should be 6 mm minimum. As it must accommodate thermal and dynamic movements, the actual joint movements should be calculated. Ideally the bite to glue line ratio should be not more than about 3:1.

Accessory Selection - The appropriate selection of all accessories such as setting blocks and backing materials is important to avoid discoloration or adhesion-related problems due to incompatibility. Dow will also assess the suitability of proposed accessory materials as part of the standard testing services. Silicone-based setting blocks are generally recommended for best compatibility.

Preparatory Work - Thoroughly clean all substrates to be sealed. Remove all contaminants such as grease, oil, dust, frost or water. All metal, glass, or other surfaces should be cleaned with the recommended solvent, using a lint free cloth. 

Method Of Application - Install backing material or joint filler, setting blocks, spacer shims and tapes. Mask areas adjacent to joints to ensure neat sealant lines. Apply DOWSIL 795 Structural Glazing Sealant in a continuous operation using positive pressure. (The sealant can be applied using many types of air-operated guns and most types of bulk dispensing equipment.) Before a skin forms (typically within 15 minutes), tool the sealant with light pressure to spread the sealant against the backing material and joint surfaces. Remove masking tape as soon as the bead is tooled. 

This product is neither tested nor represented as suitable for medical or pharmaceutical uses. DOWSIL 795 Structural Glazing Sealant should not be used for structural applications without the prior written approval of the Construction Industry Technical Services Department. Each project should be specifically and separately approved by Dow. 

Project specific approval involves the following prerequisites: 
• Joint dimensioning and print reviews. 
• Successful laboratory adhesion and compatibility testing to all building components. 
• Observance of professional sealant application and workmanship standards. 
• Users should always consult the Technical Services Department for adhesion recommendation. 

Dow shall not be held liable for any possible claims arising from structural glazing use of DOWSIL 795 Structural  Glazing Sealant for projects which have not been specifically approved by Dow. For projects which have been approved, Dow will issue a structural adhesion warranty on a case-by-case basis at the user's request. It is the user's exclusive responsibility to ensure project compliance with local building regulations.