Substrate preparation: 

Ensure the substrate is sound and clean, free from cracks, delaminations, grease, and dry, without any biological or chemical efflorescence. The substrate should also be free of algae and fungal growth. Before application, weak, dusty, or highly absorbent substrates must be treated with an appropriate penetrating primer to improve adhesion.

TERRIX PR-DP – Deep penetration primer for absorbent substrates

TERRIX PR-UA-Q – Universal acrylic primer with quartz

TERRIX PR-ST-LB – Silicate primer for absorbent substrates

The selection of the appropriate primer should be confirmed with Terrix’s technical department for each specific application.

Preparation: 

Gradually pour the entire contents of the package into a container with a measured quantity of clean, cold water (approximately 6.0 litres) while continuously stirring with a mixer/drill with a low-speed stirring attachment until a homogeneous mass free of lumps is obtained. After waiting for 5 minutes and mixing again, the mortar is ready for use. The usable period of the prepared mortar is approximately 2 hours (at a temperature of +20°C and with a relative air humidity of 50%).

Application method (adhering insulation):

• Adhering External and Double-Layer Mineral Wool Panels: Prepare the adhesive mortar for filling and patching the panels, focusing on areas where the mortar will be applied using the strip-pointing method. Apply the prepared mortar in strips, approximately 60 mm wide, along the entire perimeter of the panel’s outer edges. Additionally, place 6 to 8 blobs of mortar, each with a diameter of 100 to 120 mm, evenly distributed across the panel surface. Shape the applied mortar on the edge strips into a pyramid form, sloping at a 45° angle towards the panel’s surface.After applying the mortar, immediately press the panel against the designated area on the wall, ensuring it is flush with adjacent panels. The panels should be adhered in an interlocking manner, tightly fitting against each other. Remove any excess mortar from the edges of the panel to avoid residue. The properly applied mortar should cover at least 40% of the panel surface, with the mortar layer not exceeding 10 mm in thickness after adhesion. After allowing sufficient bonding time (minimum of 48 hours), secure the adhered panels with appropriate mechanical fasteners according to the insulation project specifications.
• Adhering lamella mineral wool boards: Prepare the adhesive mortar and smooth the entire surface of the panel to be adhered using a stainless steel trowel. Next, apply a thin, even layer of adhesive mortar onto the prepared surface using a notched trowel (e.g., with 12 x 12 mm notches). After applying the mortar, immediately press the panel against the designated area on the wall and press it firmly into place. The mortar should cover the entire surface of the panel, with a final thickness not exceeding 10 mm after adhesion.Adhere the lamella panels in a layer-by-layer fashion, working from bottom to top and maintaining an alternating pattern. After sufficient bonding time (minimum of 48 hours), secure the adhered panels with appropriate mechanical fasteners according to the insulation project specifications.

Drying: 

The initial curing period of the mortar is at least 3 days under conditions of +20°C air temperature and 65% relative humidity. After 48 hours, the process of mechanically fastening (dowel fixing) the mineral wool can begin.

Note: Low temperatures and high relative humidity can significantly extend the mortar’s drying time.

For the application of the reinforced layer, it is recommended to use the adhesive-spackling mortar Terrix® AD-BW.

Useful hints: 

During the application and drying of the adhesive mortar, ensure a rain-free period with air temperatures between +5°C and +25°C. Clean tools with water immediately after completing the work. Avoid working on surfaces directly exposed to sunlight, in strong winds, or under high humidity conditions. To protect the mineral wool insulation from adverse weather conditions, it is recommended to cover scaffolding with protective mesh or tarpaulins.