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Pricelist: General Price List (USD) Pricelist
Pricelist: General Price List (USD) Pricelist

Akemi Darkener Plus

AKEMI® Darkener Plus is a ready-to-use, solvent-based impregnation containing reactive modified siloxanes. Absorbed into the stone by capillary action, it reacts to form a polysiloxane that deepens and enriches the natural colour and structure of fine-ground and polished stone while leaving a water- and dirt-resistant impregnation behind. It does not form a film on the surface, so the polish stays intact and the stone continues to breathe. Its longer working time makes it well suited to larger surfaces, and it can be tinted with AKEMI® Stone Ink to intensify or change the stone’s colour.

  • Deep, rich colour enhancement on fine-ground and polished stone
  • Prolonged working time — easier to control on larger areas
  • Tintable with AKEMI® Stone Ink (up to 30%) to adjust or change colour
  • No surface film — keeps the polish and lets the stone breathe
  • Weather-resistant, non-yellowing — for indoor and outdoor use

This product is offered in the following options — select your choice above:

SizeItem Reference
1 LCARE.10991
5 LCARE.10992
PropertyDetail
BrandAkemi
ManufacturerAKEMI GmbH, Nuremberg, Germany
Product TypeSolvent-based colour-enhancing impregnation
Chemical BasisReactive modified siloxanes (forms a polysiloxane on curing)
ColorOpaque liquid (tintable with AKEMI® Stone Ink)
DensityApprox. 0.92 g/cm³ (7.7 lb/gal)
CoverageApprox. 407–814 ft²/gal (10–20 m²/liter)
Optimal Working Temp.59–77°F (15–25°C)
Wipe-Off TimeRemove excess approx. 10–15 min after application
Max. Tint AdditionUp to 30% AKEMI® Stone Ink
Use LocationIndoor and outdoor
Tool CleanerAKEMI® Nitro-Dilution
Shelf Life2 years, sealed, stored cool
  • Intensifies the natural colour and structure of fine-ground and polished stone
  • Maintains the lustre of the polish
  • Can be coloured with AKEMI® Stone Ink to intensify or change the stone’s colour
  • Does not form a layer on the surface and allows the stone to breathe
  • Excellent weather resistance and durability; non-yellowing
  • Prolonged working time for easier application
  • Water- and dirt-resistant effect; for indoor and outdoor use

For fine-ground and polished absorbent natural and artificial stone, including:

  • Marble, slate, Solnhofen limestone, sandstone
  • Granite and gneiss
  • Concrete ashlar

Colour enhancement is very durable on silicate-based stone and durable on lime-based stone. Not suitable for glazed or non-absorbent surfaces.

Disregarding the processing guidelines can lead to irreparable damage — always prepare a 1–2 m² sample area first, especially when tinting.

  1. Clean the surface — it must be clean, totally dry, and free from all residues and harmful salts. Use the appropriate AKEMI® cleaner, rinse with water, and let the stone dry completely (1–2 days). Optimal working temperature is 59–77°F (15–25°C); protect from rain for approx. 24 hours and keep out of direct sun and underfloor heat.
  2. For colour adjustment, tint with AKEMI® Stone Ink (max. 30%). Once tinted, use within 1 day.
  3. Apply undiluted with a brush, paint roller, or spraying device in a thin, smooth layer, allowing the product to absorb into the stone.
  4. Approx. 10–15 minutes after application, remove all excess with an absorbent cloth. Surfaces treated with tinted product should additionally be cleaned with AKEMI® Cleaner I.
  5. Re-polish polished surfaces until any haze is completely removed. Clean tools with AKEMI® Nitro-Dilution.
  • Seal the reverse and lateral faces of the stone (e.g. with AKEMI® Anti-Stain Coating 2015) so that rising moisture cannot penetrate.
  • On some stones (e.g. Nero Assoluto, Nero Impala) natural structures may be enhanced more strongly than the surrounding surface — this is a stone characteristic, not a product defect.
  • When spraying, avoid aerosol formation, do not breathe vapours, and wear a protective mask. Clean spray nozzles and parts in contact with the product to prevent sticking.
  • Protect nearby solvent-sensitive materials (synthetics, rubber, lacquered parts); use a liquid-glove hand protector.
  • Inaccurately applied product can often be removed with AKEMI® Impregnation Remover; empty the container completely for disposal.
  • Industrial chemical product — use only in well-ventilated areas and wear chemical-resistant gloves and eye protection. Always consult the AKEMI Safety Data Sheet (SDS) before use.

Industrial chemical product. Use only in well-ventilated areas. Wear chemical-resistant gloves and eye protection. Consult the AKEMI Safety Data Sheet (available from the manufacturer or stein.akemi.de) before use. Technical values are manufacturer figures at 68°F (20°C) and may vary with jobsite conditions.

Specifications

Size 1 L, 5 L