Sanitary Silicone Akemi flannel grey 15, 310 ml cartridge, Art. No. 16268

Sanitary Silicone Akemi flannel grey 15 and correct back-filling

What brings a tiler back to site after two years is rarely the sealant. It is the joint that sticks to the base. If the silicone adheres not only to both flanks but to the joint base as well, it cannot absorb movement across the free cross-section — and it tears.

Flannel grey 15 is one of AKEMI's warm greys in this range. What sits beneath it decides the service life.

Application area

AKEMI® Sanitary Silicone is a special joint-sealing material for expansion and connecting joints in kitchens, living and sanitary areas on ceramic tiles. Approved for interior and exterior use. Excellent and durable adhesion on non-porous silicate materials: glass, glazed ceramics, tiles, clinker, glass ceramics, email, porcelain and aluminium.

Adhesion on three flanks, PE and PUR: what belongs underneath the joint

The manufacturer puts it briefly: to avoid adhesion on three flanks and in case of deep joints, use back-filling cords. The cord has two jobs — it limits the joint depth and it prevents the sealant from adhering to the base.

The material choice is not arbitrary. For humid room applications as well as in outdoor and permanent wet areas, use closed-cell PE back-filling cords; otherwise use open-cell PUR back-filling cords. The reason lies in the material: closed-cell polyethylene is not water-absorbent and rot-free; open-cell polyurethane is not. In showers, bathrooms and outdoors, PE is therefore the only correct choice. AKEMI supplies the PE cords in grey and the PUR cords in yellow — the fastest distinction on site.

Joint size at least 5 x 3 mm (width x depth). The cord must be selected so that this minimum depth is preserved.

Then there is substrate preparation: contact surfaces dry, clean, free of grease and dust. Clean with AKEMI® Cleaner A on tiles, ceramics, glass, non-painted wood and metal; AKEMI® Cleaner I on plastics and painted surfaces. Mask off surfaces in the area of the joint edges with special adhesive tape.

Depending on the substrate and subsequent loads, adhesion can be improved using cleaners and primers — AKEMI names Clean Primer AP 40 for non-porous surfaces and Primer AP 10 for porous or absorbent surfaces. Important: do not apply the primer to visible surfaces, or staining may result.

Technical data

Full characteristic values, test standards and processing instructions: see the manufacturer's Technical Data Sheet.

Consumption per cartridge

Application in brief

1. Contact surfaces dry, clean, free of grease and dust; clean with AKEMI® Cleaner A (tiles, ceramics, glass, non-painted wood, metal) or Cleaner I (plastics, painted surfaces).
2. Joint size min. 5 x 3 mm. Insert back-filling cords to avoid adhesion on three flanks: closed-cell PE in damp rooms and outdoors, otherwise open-cell PUR. Mask off the joint edges.
3. Apply at +5 °C to +35 °C with dry flanks. Smoothen within 10–15 minutes using a smoothing rubber and smoothing agent; remove excess smoothing agent.
4. Remove the masking tape before the skin forms, pulling towards the joint. Clean tools with AKEMI® Cleaner A.

Full instructions for use in the manufacturer's Technical Data Sheet.

Important restrictions

For professional use only. Not suited for porous, absorbent surfaces like natural and artificial stone — danger of discolouring in the marginal zone. AKEMI offers dedicated neutral cross-linked products for natural stone.

• Releases acetic acid during hardening — not on or near acid- or corrosion-sensitive materials (iron, copper, brass, zinc, lead, concrete, materials containing lime or cement).
• No sufficient adhesion on silicone, PE, PP, PTFE, butyl rubber, neoprene, EPDM or plasticised plastics.
• Discolouration on tar- and bitumen-coated surfaces as well as elastomers (EPDM, APTC, neoprene).
• On wood, metal, paints, plastics, stainless steel and sanitary acrylate no general prediction is possible — test adhesion and compatibility beforehand.
• Not for the construction of aquariums. Read the Safety Data Sheet.

Conformity

EN 15651-3 (XS1) · EN 15651-4 (PW20LM Ext.-Int.) · GEV EMICODE® EC1^PLUS · VOC France emission class A+ · REACH compliant (EU No. 1907/2006) · IVD-leaflets 3-1 and 14.

Further colours in this range

Sanitary Silicone Akemi transparent 01 (Art. No. 16255) · Sanitary Silicone Akemi white 02 (Art. No. 16256) · Sanitary Silicone Akemi silver grey 05 (Art. No. 16259) · Sanitary Silicone Akemi pale grey 11 (Art. No. 16264) · Sanitary Silicone Akemi bright grey 12 (Art. No. 16265) · Sanitary Silicone Akemi stone grey 17 (Art. No. 16270) · Sanitary Silicone Akemi sanitary grey 18 (Art. No. 16271) · Sanitary Silicone Akemi grey 22 (Art. No. 16275) · Sanitary Silicone Akemi anthracite 23 (Art. No. 16276) · Sanitary Silicone Akemi cloud grey 74 (Art. No. 16300) · Sanitary Silicone Akemi fog 82 (Art. No. 16304)