• Low-modulus neutral-cure silicone providing ±50 % joint movement capability
• Excellent adhesion to glass, aluminium, masonry, and painted surfaces
• Ideal for curtain walls, glazing, and window perimeter joints
• Outstanding resistance to UV, ozone, and extreme weather conditions
• Maintains long-term flexibility without shrinkage or cracking

1. Surface Preparation

• Non-porous substrates (e.g. glass, aluminium, metals): Clean with Dowsil R-40 Universal Cleaner or another approved solvent on an oil- and lint-free cloth; wipe dry immediately.
• Porous materials (e.g. concrete, brick, stone): Remove loose particles and dust by wire-brushing or other mechanical methods. Ensure surfaces are clean, dry, and sound.

2. Masking - Use masking tape along joint edges to achieve clean lines and prevent spreading onto adjacent finishes.

3. Application - Cut the nozzle to the required joint width. Using a suitable caulking gun, apply a continuous bead of Dowsil 791, ensuring full contact with both joint faces.

4. Tooling - Tool immediately after gunning to compress the sealant into the joint and create a smooth, concave profile. Remove masking tape before skin forms.